diff --git a/.github/workflows/bwc-test-workflow.yml b/.github/workflows/bwc-test-workflow.yml
new file mode 100644
index 000000000..692880cdd
--- /dev/null
+++ b/.github/workflows/bwc-test-workflow.yml
@@ -0,0 +1,32 @@
+name: Backward compatibility test workflow
+on:
+  pull_request:
+    branches:
+      - "*"
+  push:
+    branches:
+      - "*"
+
+jobs:
+  test:
+    # This job runs on Linux
+    runs-on: ubuntu-latest
+    steps:
+      # This step uses the setup-java Github action: https://github.com/actions/setup-java
+      - name: Set Up JDK
+        uses: actions/setup-java@v1
+        with:
+          java-version: 17
+      # index-management
+      - name: Checkout Branch
+        uses: actions/checkout@v2
+      - name: Run IM Backwards Compatibility Tests
+        run: |
+          echo "Running backwards compatibility tests..."
+          ./gradlew bwcTestSuite
+      - name: Upload failed logs
+        uses: actions/upload-artifact@v2
+        if: failure()
+        with:
+          name: logs
+          path: build/testclusters/indexmanagementBwcCluster*/logs/*
diff --git a/.github/workflows/create-documentation-issue.yml b/.github/workflows/create-documentation-issue.yml
index 23bc47e6f..b20b78117 100644
--- a/.github/workflows/create-documentation-issue.yml
+++ b/.github/workflows/create-documentation-issue.yml
@@ -2,6 +2,7 @@ name: Create Documentation Issue
 on:
   pull_request:
     types:
+      - closed
       - labeled
 env:
   PR_NUMBER: ${{ github.event.number }}
diff --git a/.github/workflows/dco.yml b/.github/workflows/dco.yml
deleted file mode 100644
index 53ed5304c..000000000
--- a/.github/workflows/dco.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-name: Developer Certificate of Origin Check
-
-on: [pull_request]
-
-jobs:
-  check:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Get PR Commits
-        id: 'get-pr-commits'
-        uses: tim-actions/get-pr-commits@v1.1.0
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-      - name: DCO Check
-        uses: tim-actions/dco@v1.1.0
-        with:
-          commits: ${{ steps.get-pr-commits.outputs.commits }}
\ No newline at end of file
diff --git a/.github/workflows/links.yml b/.github/workflows/links.yml
index cbcf25750..af6c25f3a 100644
--- a/.github/workflows/links.yml
+++ b/.github/workflows/links.yml
@@ -6,7 +6,7 @@ on:
     branches: [ main ]
 
 jobs:
-  linkchecker:
+  check:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
diff --git a/.github/workflows/multi-node-test-workflow.yml b/.github/workflows/multi-node-test-workflow.yml
index 8f634003a..aaa37dc98 100644
--- a/.github/workflows/multi-node-test-workflow.yml
+++ b/.github/workflows/multi-node-test-workflow.yml
@@ -9,17 +9,15 @@ on:
       - "*"
 
 jobs:
-  build:
-    # Job name
-    name: Build Index Management
+  test:
     # This job runs on Linux
     runs-on: ubuntu-latest
     steps:
       # This step uses the setup-java Github action: https://github.com/actions/setup-java
-      - name: Set Up JDK 11
+      - name: Set Up JDK
         uses: actions/setup-java@v1
         with:
-          java-version: 11
+          java-version: 17
       # index-management
       - name: Checkout Branch
         uses: actions/checkout@v2
@@ -31,20 +29,3 @@ jobs:
         with:
           name: logs
           path: build/testclusters/integTest-*/logs/*
-  bwc:
-    name: Run Index Management Backwards Compatibility Tests
-    # This job runs on Linux
-    runs-on: ubuntu-latest
-    steps:
-      # This step uses the setup-java Github action: https://github.com/actions/setup-java
-      - name: Set Up JDK 11
-        uses: actions/setup-java@v1
-        with:
-          java-version: 11
-      # index-management
-      - name: Checkout Branch
-        uses: actions/checkout@v2
-      - name: Run IM Backwards Compatibility Tests
-        run: |
-          echo "Running backwards compatibility tests..."
-          ./gradlew bwcTestSuite
diff --git a/.github/workflows/test-and-build-workflow.yml b/.github/workflows/test-and-build-workflow.yml
index b3dd0ded9..d324148e8 100644
--- a/.github/workflows/test-and-build-workflow.yml
+++ b/.github/workflows/test-and-build-workflow.yml
@@ -9,8 +9,6 @@ on:
 
 jobs:
   build:
-    # Job name
-    name: Build Index Management
     env:
       BUILD_ARGS: ${{ matrix.os_build_args }}
       WORKING_DIR: ${{ matrix.working_directory }}.
diff --git a/build.gradle b/build.gradle
index 07db1a7fa..9872edc51 100644
--- a/build.gradle
+++ b/build.gradle
@@ -137,7 +137,6 @@ task ktlint(type: JavaExec, group: "verification") {
     classpath = configurations.ktlint
     args "src/**/*.kt", "spi/src/main/**/*.kt"
 }
-
 check.dependsOn ktlint
 
 task ktlintFormat(type: JavaExec, group: "formatting") {
@@ -145,12 +144,17 @@ task ktlintFormat(type: JavaExec, group: "formatting") {
     main = "com.pinterest.ktlint.Main"
     classpath = configurations.ktlint
     args "-F", "src/**/*.kt", "spi/src/main/**/*.kt"
+    // https://github.com/pinterest/ktlint/issues/1391
+    jvmArgs "--add-opens=java.base/java.lang=ALL-UNNAMED"
 }
 
 detekt {
     config = files("detekt.yml")
     buildUponDefaultConfig = true
 }
+// When writing detekt Gradle first finds the extension with this name,
+// but with a string it should look for a task with that name instead
+check.dependsOn "detekt"
 
 configurations.testImplementation {
     exclude module: "securemock"
@@ -656,7 +660,14 @@ run {
     }
 }
 
-compileKotlin { kotlinOptions.freeCompilerArgs = ['-Xjsr305=strict'] }
+compileKotlin {
+    kotlinOptions.freeCompilerArgs = ['-Xjsr305=strict']
+    kotlinOptions.allWarningsAsErrors = true
+}
+
+compileTestKotlin {
+    kotlinOptions.allWarningsAsErrors = true
+}
 
 apply from: 'build-tools/pkgbuild.gradle'
 
diff --git a/detekt.yml b/detekt.yml
index 47b9d163c..77c5afe01 100644
--- a/detekt.yml
+++ b/detekt.yml
@@ -1,6 +1,5 @@
-# TODO: Remove this before initial release, only for developmental purposes
 build:
-  maxIssues: 20
+  maxIssues: 0
 
 exceptions:
   TooGenericExceptionCaught:
@@ -14,6 +13,8 @@ style:
   MaxLineLength:
     maxLineLength: 150
     excludes: ['**/test/**']
+  FunctionOnlyReturningConstant:
+    active: false
 
 complexity:
   LargeClass:
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementHistory.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementHistory.kt
index 763603ecc..2b846f9e3 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementHistory.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementHistory.kt
@@ -19,7 +19,7 @@ import org.opensearch.action.index.IndexRequest
 import org.opensearch.action.support.IndicesOptions
 import org.opensearch.action.support.master.AcknowledgedResponse
 import org.opensearch.client.Client
-import org.opensearch.cluster.LocalNodeMasterListener
+import org.opensearch.cluster.LocalNodeClusterManagerListener
 import org.opensearch.cluster.service.ClusterService
 import org.opensearch.common.settings.Settings
 import org.opensearch.common.xcontent.ToXContent
@@ -47,7 +47,7 @@ class IndexStateManagementHistory(
     private val threadPool: ThreadPool,
     private val clusterService: ClusterService,
     private val indexManagementIndices: IndexManagementIndices
-) : LocalNodeMasterListener {
+) : LocalNodeClusterManagerListener {
 
     private val logger = LogManager.getLogger(javaClass)
     private var scheduledRollover: Scheduler.Cancellable? = null
@@ -61,7 +61,7 @@ class IndexStateManagementHistory(
     @Volatile private var historyNumberOfReplicas = ManagedIndexSettings.HISTORY_NUMBER_OF_REPLICAS.get(settings)
 
     init {
-        clusterService.addLocalNodeMasterListener(this)
+        clusterService.addLocalNodeClusterManagerListener(this)
         clusterService.clusterSettings.addSettingsUpdateConsumer(ManagedIndexSettings.HISTORY_ENABLED) {
             historyEnabled = it
         }
@@ -82,7 +82,7 @@ class IndexStateManagementHistory(
         }
     }
 
-    override fun onMaster() {
+    override fun onClusterManager() {
         try {
             // try to rollover immediately as we might be restarting the cluster
             if (historyEnabled) rolloverHistoryIndex()
@@ -97,12 +97,12 @@ class IndexStateManagementHistory(
         }
     }
 
-    override fun offMaster() {
+    override fun offClusterManager() {
         scheduledRollover?.cancel()
     }
 
     private fun rescheduleRollover() {
-        if (clusterService.state().nodes.isLocalNodeElectedMaster) {
+        if (clusterService.state().nodes.isLocalNodeElectedClusterManager) {
             scheduledRollover?.cancel()
             scheduledRollover = threadPool.scheduleWithFixedDelay(
                 { rolloverAndDeleteHistoryIndex() },
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/ManagedIndexCoordinator.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/ManagedIndexCoordinator.kt
index 26d1ac590..20b621f99 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/ManagedIndexCoordinator.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/ManagedIndexCoordinator.kt
@@ -160,8 +160,10 @@ class ManagedIndexCoordinator(
         }
         clusterService.clusterSettings.addSettingsUpdateConsumer(METADATA_SERVICE_STATUS) {
             metadataServiceEnabled = it == 0
-            if (!metadataServiceEnabled) scheduledMoveMetadata?.cancel()
-            else initMoveMetadata()
+            if (!metadataServiceEnabled) {
+                logger.info("Canceling metadata moving job because of cluster setting update.")
+                scheduledMoveMetadata?.cancel()
+            } else initMoveMetadata()
         }
         clusterService.clusterSettings.addSettingsUpdateConsumer(TEMPLATE_MIGRATION_CONTROL) {
             templateMigrationEnabled = it >= 0L
@@ -202,8 +204,8 @@ class ManagedIndexCoordinator(
         // Instead of using a LocalNodeMasterListener to track cluster manager changes, this service will
         // track them here to avoid conditions where cluster manager listener events run after other
         // listeners that depend on what happened in the cluster manager listener
-        if (this.isClusterManager != event.localNodeMaster()) {
-            this.isClusterManager = event.localNodeMaster()
+        if (this.isClusterManager != event.localNodeClusterManager()) {
+            this.isClusterManager = event.localNodeClusterManager()
             if (this.isClusterManager) {
                 onClusterManager()
             } else {
@@ -215,7 +217,7 @@ class ManagedIndexCoordinator(
 
         if (event.isNewCluster) return
 
-        if (!event.localNodeMaster()) return
+        if (!event.localNodeClusterManager()) return
 
         if (!event.metadataChanged()) return
 
@@ -380,7 +382,7 @@ class ManagedIndexCoordinator(
     }
 
     /**
-     * Find a policy that has highest priority ism template with matching index pattern to the index and is created before index creation date. If
+     * Find a policy that has the highest priority ism template with matching index pattern to the index and is created before index creation date. If
      * the policy has user, ensure that the user can manage the index if not find the one that can.
      * */
     private suspend fun findMatchingPolicy(indexName: String, creationDate: Long, policies: List<Policy>): Policy? {
@@ -422,7 +424,7 @@ class ManagedIndexCoordinator(
             try {
                 val request = ManagedIndexRequest().indices(indexName)
                 withClosableContext(IndexManagementSecurityContext("ApplyPolicyOnIndexCreation", settings, threadPool.threadContext, policy.user)) {
-                    val response: AcknowledgedResponse = client.suspendUntil { execute(ManagedIndexAction.INSTANCE, request, it) }
+                    client.suspendUntil<Client, AcknowledgedResponse> { execute(ManagedIndexAction.INSTANCE, request, it) }
                 }
             } catch (e: OpenSearchSecurityException) {
                 logger.debug("Skipping applying policy ${policy.id} on $indexName as the policy user is missing permissions", e)
@@ -473,13 +475,13 @@ class ManagedIndexCoordinator(
         // If ISM is disabled return early
         if (!isIndexStateManagementEnabled()) return
 
-        // Do not setup background sweep if we're not the elected cluster manager node
-        if (!clusterService.state().nodes().isLocalNodeElectedMaster) return
+        // Do not set up background sweep if we're not the elected cluster manager node
+        if (!clusterService.state().nodes().isLocalNodeElectedClusterManager) return
 
         // Cancel existing background sweep
         scheduledFullSweep?.cancel()
 
-        // Setup an anti-entropy/self-healing background sweep, in case we fail to create a ManagedIndexConfig job
+        // Set up an anti-entropy/self-healing background sweep, in case we fail to create a ManagedIndexConfig job
         val scheduledSweep = Runnable {
             val elapsedTime = getFullSweepElapsedTime()
 
@@ -505,7 +507,7 @@ class ManagedIndexCoordinator(
     fun initMoveMetadata() {
         if (!metadataServiceEnabled) return
         if (!isIndexStateManagementEnabled()) return
-        if (!clusterService.state().nodes().isLocalNodeElectedMaster) return
+        if (!clusterService.state().nodes().isLocalNodeElectedClusterManager) return
         scheduledMoveMetadata?.cancel()
 
         if (metadataService.finishFlag) {
@@ -535,7 +537,7 @@ class ManagedIndexCoordinator(
     fun initTemplateMigration(enableSetting: Long) {
         if (!templateMigrationEnabled) return
         if (!isIndexStateManagementEnabled()) return
-        if (!clusterService.state().nodes().isLocalNodeElectedMaster) return
+        if (!clusterService.state().nodes().isLocalNodeElectedClusterManager) return
         scheduledTemplateMigration?.cancel()
 
         // if service has finished, re-enable it
@@ -657,8 +659,7 @@ class ManagedIndexCoordinator(
                 if (scrollIDsToClear.isNotEmpty()) {
                     val clearScrollRequest = ClearScrollRequest()
                     clearScrollRequest.scrollIds(scrollIDsToClear.toList())
-                    val clearScrollResponse: ClearScrollResponse =
-                        client.suspendUntil { execute(ClearScrollAction.INSTANCE, clearScrollRequest, it) }
+                    client.suspendUntil<Client, ClearScrollResponse> { execute(ClearScrollAction.INSTANCE, clearScrollRequest, it) }
                 }
             }
             return managedIndexUuids
@@ -693,7 +694,7 @@ class ManagedIndexCoordinator(
         val mRes: MultiGetResponse = client.suspendUntil { multiGet(mReq, it) }
         val responses = mRes.responses
         if (responses.first().isFailed) {
-            // config index may not initialised yet
+            // config index may not initialise yet
             logger.error("get managed-index failed: ${responses.first().failure.failure}")
             return result
         }
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/ManagedIndexRunner.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/ManagedIndexRunner.kt
index 0b0f58d64..668012a25 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/ManagedIndexRunner.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/ManagedIndexRunner.kt
@@ -269,7 +269,6 @@ object ManagedIndexRunner :
         // the cluster state index uuid differs from the one in the managed index config then the config is referring
         // to a different index which does not exist in the cluster. We need to check all of the extensions to confirm an index exists
         if (clusterStateIndexMetadata == null || clusterStateIndexUUID != managedIndexConfig.indexUuid) {
-            clusterStateIndexMetadata = null
             // If the cluster state/default index type didn't have an index with a matching name and uuid combination, try all other index types
             val nonDefaultIndexTypes = indexMetadataProvider.services.keys.filter { it != DEFAULT_INDEX_TYPE }
             val multiTypeIndexNameToMetaData =
@@ -387,7 +386,7 @@ object ManagedIndexRunner :
         // If this action is not allowed and the step to be executed is the first step in the action then we will fail
         // as this action has been removed from the AllowList, but if its not the first step we will let it finish as it's already inflight
         if (action?.isAllowed(allowList) == false && step != null && action.isFirstStep(step.name) && action.type != TransitionsAction.name) {
-            val info = mapOf("message" to "Attempted to execute action=${action?.type} which is not allowed.")
+            val info = mapOf("message" to "Attempted to execute action=${action.type} which is not allowed.")
             val updated = updateManagedIndexMetaData(
                 managedIndexMetaData.copy(
                     policyRetryInfo = PolicyRetryInfoMetaData(true, 0), info = info
@@ -404,7 +403,13 @@ object ManagedIndexRunner :
         @Suppress("ComplexCondition", "MaxLineLength")
         if (updateResult.metadataSaved && state != null && action != null && step != null && currentActionMetaData != null) {
             if (validationServiceEnabled) {
-                val validationResult = actionValidation.validate(action.type, stepContext.metadata.index)
+                val validationResult = withClosableContext(
+                    IndexManagementSecurityContext(
+                        managedIndexConfig.id, settings, threadPool.threadContext, managedIndexConfig.policy.user
+                    )
+                ) {
+                    actionValidation.validate(action.type, stepContext.metadata.index)
+                }
                 if (validationResult.validationStatus == Validate.ValidationStatus.RE_VALIDATING) {
                     logger.warn("Validation Status is: RE_VALIDATING. The action is {}, state is {}, step is {}.\", action.type, state.name, step.name")
                     publishErrorNotification(policy, managedIndexMetaData)
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/MetadataService.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/MetadataService.kt
index b69fcac5c..c42682f71 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/MetadataService.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/MetadataService.kt
@@ -191,12 +191,12 @@ class MetadataService(
 
             override fun onResponse(response: ClusterUpdateSettingsResponse) {
                 if (!response.isAcknowledged) {
-                    logger.error("Update template migration setting to $status is not acknowledged")
+                    logger.error("Update metadata migration setting to $status is not acknowledged")
                     throw IndexManagementException.wrap(
-                        Exception("Update template migration setting to $status is not acknowledged")
+                        Exception("Update metadata migration setting to $status is not acknowledged")
                     )
                 } else {
-                    logger.info("Successfully update template migration setting to $status")
+                    logger.info("Successfully metadata template migration setting to $status")
                 }
             }
         }
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/model/ManagedIndexConfig.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/model/ManagedIndexConfig.kt
index acaabc864..9a87bc1d0 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/model/ManagedIndexConfig.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/model/ManagedIndexConfig.kt
@@ -178,7 +178,7 @@ data class ManagedIndexConfig(
                 policySeqNo = policySeqNo,
                 policyPrimaryTerm = policyPrimaryTerm,
                 policy = policy?.copy(
-                    id = policyID ?: NO_ID,
+                    id = policyID,
                     seqNo = policySeqNo ?: SequenceNumbers.UNASSIGNED_SEQ_NO,
                     primaryTerm = policyPrimaryTerm ?: SequenceNumbers.UNASSIGNED_PRIMARY_TERM
                 ),
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/model/coordinator/SweptManagedIndexConfig.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/model/coordinator/SweptManagedIndexConfig.kt
index a148d5fde..80fed45d1 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/model/coordinator/SweptManagedIndexConfig.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/model/coordinator/SweptManagedIndexConfig.kt
@@ -31,7 +31,7 @@ data class SweptManagedIndexConfig(
 ) {
 
     companion object {
-        @Suppress("ComplexMethod", "UnusedPrivateMember")
+        @Suppress("ComplexMethod", "UNUSED_PARAMETER")
         @JvmStatic
         @Throws(IOException::class)
         fun parse(xcp: XContentParser, id: String = NO_ID, seqNo: Long, primaryTerm: Long): SweptManagedIndexConfig {
@@ -60,11 +60,11 @@ data class SweptManagedIndexConfig(
             }
 
             return SweptManagedIndexConfig(
-                requireNotNull(index) { "SweptManagedIndexConfig index is null" },
+                index,
                 seqNo,
                 primaryTerm,
-                requireNotNull(uuid) { "SweptManagedIndexConfig uuid is null" },
-                requireNotNull(policyID) { "SweptManagedIndexConfig policy id is null" },
+                uuid,
+                policyID,
                 policy,
                 changePolicy
             )
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/close/AttemptCloseStep.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/close/AttemptCloseStep.kt
index bab8423e8..3e02ecb91 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/close/AttemptCloseStep.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/close/AttemptCloseStep.kt
@@ -44,7 +44,7 @@ class AttemptCloseStep : Step(name) {
         } catch (e: RemoteTransportException) {
             val cause = ExceptionsHelper.unwrapCause(e)
             if (cause is SnapshotInProgressException) {
-                handleSnapshotException(indexName, cause as SnapshotInProgressException)
+                handleSnapshotException(indexName, cause)
             } else {
                 handleException(indexName, cause as Exception)
             }
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/rollup/AttemptCreateRollupJobStep.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/rollup/AttemptCreateRollupJobStep.kt
index f86d0a3b5..a5e767d64 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/rollup/AttemptCreateRollupJobStep.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/step/rollup/AttemptCreateRollupJobStep.kt
@@ -10,6 +10,7 @@ import org.opensearch.ExceptionsHelper
 import org.opensearch.OpenSearchException
 import org.opensearch.action.support.WriteRequest
 import org.opensearch.action.support.master.AcknowledgedResponse
+import org.opensearch.client.Client
 import org.opensearch.index.engine.VersionConflictEngineException
 import org.opensearch.indexmanagement.indexstatemanagement.action.RollupAction
 import org.opensearch.indexmanagement.opensearchapi.suspendUntil
@@ -85,7 +86,7 @@ class AttemptCreateRollupJobStep(private val action: RollupAction) : Step(name)
         logger.info("Attempting to re-start the job $rollupId")
         try {
             val startRollupRequest = StartRollupRequest(rollupId)
-            val response: AcknowledgedResponse = client.suspendUntil { execute(StartRollupAction.INSTANCE, startRollupRequest, it) }
+            client.suspendUntil<Client, AcknowledgedResponse> { execute(StartRollupAction.INSTANCE, startRollupRequest, it) }
             stepStatus = StepStatus.COMPLETED
             info = mapOf("message" to getSuccessRestartMessage(rollupId, indexName))
         } catch (e: Exception) {
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/changepolicy/TransportChangePolicyAction.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/changepolicy/TransportChangePolicyAction.kt
index fed9cf828..4fcdf487c 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/changepolicy/TransportChangePolicyAction.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/changepolicy/TransportChangePolicyAction.kt
@@ -288,7 +288,7 @@ class TransportChangePolicyAction @Inject constructor(
                             )
                         )
                     // if there exists a transitionTo on the ManagedIndexMetaData then we will
-                    // fail as they might not of meant to add a ChangePolicy when its on the next state
+                    // fail as they might not of meant to add a ChangePolicy when it's on the next state
                     managedIndexMetadata?.transitionTo != null ->
                         failedIndices.add(
                             FailedIndex(
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/explain/ExplainResponse.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/explain/ExplainResponse.kt
index 11a1585b3..a0871db8d 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/explain/ExplainResponse.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/explain/ExplainResponse.kt
@@ -57,7 +57,7 @@ open class ExplainResponse : ActionResponse, ToXContentObject {
         indexPolicyIDs = sin.readStringList(),
         indexMetadatas = sin.readList { ManagedIndexMetaData.fromStreamInput(it) },
         totalManagedIndices = sin.readInt(),
-        enabledState = sin.readMap() as Map<String, Boolean>,
+        enabledState = sin.readMap(StreamInput::readString, StreamInput::readBoolean),
         policies = sin.readMap(StreamInput::readString, ::Policy),
         validationResults = sin.readList { ValidationResult.fromStreamInput(it) }
     )
@@ -68,7 +68,11 @@ open class ExplainResponse : ActionResponse, ToXContentObject {
         out.writeStringCollection(indexPolicyIDs)
         out.writeCollection(indexMetadatas)
         out.writeInt(totalManagedIndices)
-        out.writeMap(enabledState)
+        out.writeMap(
+            enabledState,
+            { _out, key -> _out.writeString(key) },
+            { _out, enable -> _out.writeBoolean(enable) }
+        )
         out.writeMap(
             policies,
             { _out, key -> _out.writeString(key) },
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/explain/TransportExplainAction.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/explain/TransportExplainAction.kt
index ac7caab1f..f3d079a53 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/explain/TransportExplainAction.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/transport/action/explain/TransportExplainAction.kt
@@ -383,7 +383,7 @@ class TransportExplainAction @Inject constructor(
                         filteredIndices.add(indexNames[i])
                         filteredMetadata.add(indexMetadatas[i])
                         filteredPolicies.add(indexPolicyIDs[i])
-                        validationResults[i]?.let { filteredValidationResult.add(it) }
+                        validationResults[i].let { filteredValidationResult.add(it) }
                         enabledState[indexNames[i]]?.let { enabledStatus[indexNames[i]] = it }
                         appliedPolicies[indexNames[i]]?.let { filteredAppliedPolicies[indexNames[i]] = it }
                     } catch (e: OpenSearchSecurityException) {
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/ManagedIndexUtils.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/ManagedIndexUtils.kt
index bea3ed57c..a400bf65b 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/ManagedIndexUtils.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/ManagedIndexUtils.kt
@@ -517,6 +517,7 @@ fun checkMetadata(
         val t2 = when (configIndexMetadata) {
             is ManagedIndexMetaData -> configIndexMetadata.stepMetaData?.startTime
             is Map<*, *> -> {
+                @Suppress("UNCHECKED_CAST")
                 val stepMetadata = configIndexMetadata["step"] as Map<String, Any>?
                 stepMetadata?.get("start_time")
             }
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/RestHandlerUtils.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/RestHandlerUtils.kt
index fe48a7a70..151f52fa4 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/RestHandlerUtils.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/RestHandlerUtils.kt
@@ -136,7 +136,8 @@ suspend fun removeClusterStateMetadatas(client: Client, logger: Logger, indices:
 }
 
 const val MASTER_TIMEOUT_DEPRECATED_MESSAGE =
-    "Parameter [master_timeout] is deprecated and will be removed in 3.0. To support inclusive language, please use [cluster_manager_timeout] instead."
+    "Parameter [master_timeout] is deprecated and will be removed in 3.0. " +
+        "To support inclusive language, please use [cluster_manager_timeout] instead."
 const val DUPLICATE_PARAMETER_ERROR_MESSAGE =
     "Please only use one of the request parameters [master_timeout, cluster_manager_timeout]."
 fun parseClusterManagerTimeout(request: RestRequest, deprecationLogger: DeprecationLogger, restActionName: String): TimeValue {
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateDelete.kt b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateDelete.kt
index 34d8d7c3f..70ce78d58 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateDelete.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateDelete.kt
@@ -30,7 +30,7 @@ class ValidateDelete(
         if (!deleteIndexExists(indexName) || !validIndex(indexName)) {
             return this
         }
-        val (rolloverTarget, isDataStream) = getRolloverTargetOrUpdateInfo(indexName)
+        val (rolloverTarget, _) = getRolloverTargetOrUpdateInfo(indexName)
         if (rolloverTarget != null && !notWriteIndexForDataStream(rolloverTarget, indexName)) {
             return this // can't be deleted if it's write index
         }
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/rollup/RollupMapperService.kt b/src/main/kotlin/org/opensearch/indexmanagement/rollup/RollupMapperService.kt
index 0da24de23..2f44f4389 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/rollup/RollupMapperService.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/rollup/RollupMapperService.kt
@@ -106,7 +106,8 @@ class RollupMapperService(
         if (rollupJobs != null &&
             (rollupJobs.size > 1 || rollupJobs[0].id != rollup.id)
         ) {
-            errorMessage = "More than one rollup jobs present on the backing index of the target alias, cannot perform rollup to this target alias [${rollup.targetIndex}]."
+            errorMessage = "More than one rollup jobs present on the backing index of the target alias, " +
+                "cannot perform rollup to this target alias [${rollup.targetIndex}]."
             logger.error(errorMessage)
             return RollupJobValidationResult.Failure(errorMessage)
         }
@@ -152,6 +153,7 @@ class RollupMapperService(
             when (validationResult) {
                 is RollupJobValidationResult.Failure -> logger.error(validationResult.message)
                 is RollupJobValidationResult.Invalid -> logger.error(validationResult.reason)
+                else -> {}
             }
             return validationResult
         } else {
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/rollup/action/index/TransportIndexRollupAction.kt b/src/main/kotlin/org/opensearch/indexmanagement/rollup/action/index/TransportIndexRollupAction.kt
index 251ab7767..baad1f24b 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/rollup/action/index/TransportIndexRollupAction.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/rollup/action/index/TransportIndexRollupAction.kt
@@ -155,7 +155,6 @@ class TransportIndexRollupAction @Inject constructor(
             if (rollup.metrics != newRollup.metrics) modified.add(Rollup.METRICS_FIELD)
             if (rollup.sourceIndex != newRollup.sourceIndex) modified.add(Rollup.SOURCE_INDEX_FIELD)
             if (rollup.targetIndex != newRollup.targetIndex) modified.add(Rollup.TARGET_INDEX_FIELD)
-            if (rollup.roles != newRollup.roles) modified.add(Rollup.ROLES_FIELD)
             return modified.toList()
         }
 
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/Rollup.kt b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/Rollup.kt
index 021f80f1a..fa8c51d93 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/Rollup.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/Rollup.kt
@@ -195,7 +195,7 @@ data class Rollup(
         out.writeString(sourceIndex)
         out.writeString(targetIndex)
         out.writeOptionalString(metadataID)
-        out.writeStringArray(roles.toTypedArray())
+        out.writeStringArray(emptyList<String>().toTypedArray())
         out.writeInt(pageSize)
         out.writeOptionalLong(delay)
         out.writeBoolean(continuous)
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/RollupMetadata.kt b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/RollupMetadata.kt
index 5fb708719..25442c7d0 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/RollupMetadata.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/RollupMetadata.kt
@@ -295,7 +295,8 @@ fun RollupMetadata.incrementStats(response: SearchResponse, internalComposite: I
     return this.copy(
         stats = this.stats.copy(
             pagesProcessed = stats.pagesProcessed + 1L,
-            documentsProcessed = stats.documentsProcessed + internalComposite.buckets.fold(0L) { acc, it -> acc + it.docCount },
+            documentsProcessed = stats.documentsProcessed +
+                internalComposite.buckets.fold(0L) { acc, internalBucket -> acc + internalBucket.docCount },
             searchTimeInMillis = stats.searchTimeInMillis + response.took.millis
         )
     )
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Average.kt b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Average.kt
index b739016f9..a3a491206 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Average.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Average.kt
@@ -15,7 +15,7 @@ import org.opensearch.common.xcontent.XContentParserUtils.ensureExpectedToken
 
 class Average() : Metric(Type.AVERAGE) {
 
-    @Suppress("UnusedPrivateMember")
+    @Suppress("UNUSED_PARAMETER")
     constructor(sin: StreamInput) : this()
 
     override fun toXContent(builder: XContentBuilder, params: ToXContent.Params): XContentBuilder {
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Max.kt b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Max.kt
index 34fe2b2a9..ea9b54105 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Max.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Max.kt
@@ -14,7 +14,7 @@ import org.opensearch.common.xcontent.XContentParser.Token
 import org.opensearch.common.xcontent.XContentParserUtils.ensureExpectedToken
 
 class Max() : Metric(Type.MAX) {
-    @Suppress("UnusedPrivateMember")
+    @Suppress("UNUSED_PARAMETER")
     constructor(sin: StreamInput) : this()
 
     override fun toXContent(builder: XContentBuilder, params: ToXContent.Params): XContentBuilder {
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Min.kt b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Min.kt
index 8e14e87de..5d03ab18b 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Min.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Min.kt
@@ -14,7 +14,7 @@ import org.opensearch.common.xcontent.XContentParser.Token
 import org.opensearch.common.xcontent.XContentParserUtils.ensureExpectedToken
 
 class Min() : Metric(Type.MIN) {
-    @Suppress("UnusedPrivateMember")
+    @Suppress("UNUSED_PARAMETER")
     constructor(sin: StreamInput) : this()
 
     override fun toXContent(builder: XContentBuilder, params: ToXContent.Params): XContentBuilder {
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Sum.kt b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Sum.kt
index b4bc5ca7c..baf2e3f2d 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Sum.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/Sum.kt
@@ -14,7 +14,7 @@ import org.opensearch.common.xcontent.XContentParser.Token
 import org.opensearch.common.xcontent.XContentParserUtils.ensureExpectedToken
 
 class Sum() : Metric(Type.SUM) {
-    @Suppress("UnusedPrivateMember")
+    @Suppress("UNUSED_PARAMETER")
     constructor(sin: StreamInput) : this()
 
     override fun toXContent(builder: XContentBuilder, params: ToXContent.Params): XContentBuilder {
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/ValueCount.kt b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/ValueCount.kt
index daa9465e1..278b95d35 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/ValueCount.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/rollup/model/metric/ValueCount.kt
@@ -14,7 +14,7 @@ import org.opensearch.common.xcontent.XContentParser.Token
 import org.opensearch.common.xcontent.XContentParserUtils.ensureExpectedToken
 
 class ValueCount() : Metric(Type.VALUE_COUNT) {
-    @Suppress("UnusedPrivateMember")
+    @Suppress("UNUSED_PARAMETER")
     constructor(sin: StreamInput) : this()
 
     override fun toXContent(builder: XContentBuilder, params: ToXContent.Params): XContentBuilder {
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/SMUtils.kt b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/SMUtils.kt
index 95ae45b7b..c7384eefc 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/SMUtils.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/SMUtils.kt
@@ -190,6 +190,7 @@ fun preFixTimeStamp(msg: String?): String {
 }
 
 fun addSMPolicyInSnapshotMetadata(snapshotConfig: Map<String, Any>, policyName: String): Map<String, Any> {
+    @Suppress("UNCHECKED_CAST")
     var snapshotMetadata = snapshotConfig["metadata"] as MutableMap<String, String>?
     if (snapshotMetadata != null) {
         snapshotMetadata[SM_TYPE] = policyName
@@ -351,7 +352,7 @@ fun timeLimitExceeded(
 }
 
 fun getTimeLimitExceededMessage(timeLimit: TimeValue, workflow: WorkflowType): String {
-    val workflow = when (workflow) {
+    val workflowStr = when (workflow) {
         WorkflowType.CREATION -> {
             "creation"
         }
@@ -359,5 +360,5 @@ fun getTimeLimitExceededMessage(timeLimit: TimeValue, workflow: WorkflowType): S
             "deletion"
         }
     }
-    return "Time limit $timeLimit exceeded during snapshot $workflow step"
+    return "Time limit $timeLimit exceeded during snapshot $workflowStr step"
 }
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/SMStateMachine.kt b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/SMStateMachine.kt
index 4556030e5..51f4d35a2 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/SMStateMachine.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/SMStateMachine.kt
@@ -123,10 +123,11 @@ class SMStateMachine(
         } catch (ex: Exception) {
             val message = "There was an exception at ${now()} while executing Snapshot Management policy ${job.policyName}, please check logs."
             job.notificationConfig?.sendFailureNotification(client, job.policyName, message, job.user, log)
+            @Suppress("InstanceOfCheckForException")
             if (ex is SnapshotManagementException &&
                 ex.exKey == ExceptionKey.METADATA_INDEXING_FAILURE
             ) {
-                // update metadata exception is special, we don't want to retry update metadata here
+                // update metadata exception is special, we have logged out the error in updateMetadata
                 return this
             }
             log.error("Uncaught snapshot management runtime exception.", ex)
@@ -219,7 +220,9 @@ class SMStateMachine(
         // TODO SM save a copy to history
     }
 
-    private val updateMetaDataRetryPolicy = BackoffPolicy.exponentialBackoff(TimeValue.timeValueMillis(EXPONENTIAL_BACKOFF_MILLIS), MAX_NUMBER_OF_RETRIES)
+    private val updateMetaDataRetryPolicy = BackoffPolicy.exponentialBackoff(
+        TimeValue.timeValueMillis(EXPONENTIAL_BACKOFF_MILLIS), MAX_NUMBER_OF_RETRIES
+    )
 
     /**
      * Handle the policy change before job running
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/SMState.kt b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/SMState.kt
index 991a9a174..00630bd5e 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/SMState.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/SMState.kt
@@ -45,7 +45,7 @@ enum class WorkflowType {
  *   resetRetry is performed in Next and Stay.
  *   except the last one. Refer to [DeletingState]
  */
-sealed class SMResult : State.Result() {
+sealed class SMResult : State.Result {
     data class Next(val metadataToSave: SMMetadata.Builder) : SMResult()
     data class Stay(val metadataToSave: SMMetadata.Builder) : SMResult()
     data class Fail(
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/State.kt b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/State.kt
index e6c272ab0..98cf1b08e 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/State.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/State.kt
@@ -22,5 +22,5 @@ interface State {
 
     suspend fun execute(context: SMStateMachine): Result
 
-    abstract class Result
+    interface Result
 }
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/creation/CreatingState.kt b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/creation/CreatingState.kt
index bc4b296bd..bc591a486 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/creation/CreatingState.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/creation/CreatingState.kt
@@ -9,6 +9,7 @@ import org.apache.logging.log4j.Logger
 import org.opensearch.ExceptionsHelper
 import org.opensearch.action.admin.cluster.snapshots.create.CreateSnapshotRequest
 import org.opensearch.action.admin.cluster.snapshots.create.CreateSnapshotResponse
+import org.opensearch.client.ClusterAdminClient
 import org.opensearch.indexmanagement.opensearchapi.suspendUntil
 import org.opensearch.indexmanagement.snapshotmanagement.engine.SMStateMachine
 import org.opensearch.indexmanagement.snapshotmanagement.generateSnapshotName
@@ -68,7 +69,7 @@ object CreatingState : State {
             val req = CreateSnapshotRequest(job.snapshotConfig["repository"] as String, snapshotName)
                 .source(addSMPolicyInSnapshotMetadata(job.snapshotConfig, job.policyName))
                 .waitForCompletion(false)
-            val res: CreateSnapshotResponse = client.admin().cluster().suspendUntil { createSnapshot(req, it) }
+            client.admin().cluster().suspendUntil<ClusterAdminClient, CreateSnapshotResponse> { createSnapshot(req, it) }
 
             metadataBuilder.setLatestExecution(
                 status = SMMetadata.LatestExecution.Status.IN_PROGRESS,
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/deletion/DeletingState.kt b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/deletion/DeletingState.kt
index 0aa9cfdd8..69ed735b6 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/deletion/DeletingState.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/snapshotmanagement/engine/states/deletion/DeletingState.kt
@@ -9,6 +9,7 @@ import org.apache.logging.log4j.Logger
 import org.opensearch.ExceptionsHelper
 import org.opensearch.action.admin.cluster.snapshots.delete.DeleteSnapshotRequest
 import org.opensearch.action.support.master.AcknowledgedResponse
+import org.opensearch.client.ClusterAdminClient
 import org.opensearch.indexmanagement.opensearchapi.suspendUntil
 import org.opensearch.indexmanagement.snapshotmanagement.engine.SMStateMachine
 import org.opensearch.indexmanagement.snapshotmanagement.engine.states.SMResult
@@ -68,7 +69,7 @@ object DeletingState : State {
                     job.snapshotConfig["repository"] as String,
                     *snapshotsToDelete.toTypedArray()
                 )
-                val res: AcknowledgedResponse = client.admin().cluster().suspendUntil { deleteSnapshot(req, it) }
+                client.admin().cluster().suspendUntil<ClusterAdminClient, AcknowledgedResponse> { deleteSnapshot(req, it) }
 
                 metadataBuilder.setLatestExecution(
                     status = SMMetadata.LatestExecution.Status.IN_PROGRESS,
@@ -102,7 +103,8 @@ object DeletingState : State {
         return SMResult.Fail(metadataBuilder, WorkflowType.CREATION)
     }
 
-    private fun getSnapshotDeletionStartedMessage(snapshotNames: List<String>) = "Snapshots $snapshotNames deletion has been started and waiting for completion."
+    private fun getSnapshotDeletionStartedMessage(snapshotNames: List<String>) =
+        "Snapshots $snapshotNames deletion has been started and waiting for completion."
     private fun getSnapshotsMissingMessage() = "No snapshots found under policy while getting snapshots to decide which snapshots to delete."
     private fun getSnapshotsErrorMessage() = "Caught exception while getting snapshots to decide which snapshots to delete."
     private fun getDeleteSnapshotErrorMessage(snapshotNames: List<String>) = "Caught exception while deleting snapshot $snapshotNames."
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/transform/TransformProcessedBucketLog.kt b/src/main/kotlin/org/opensearch/indexmanagement/transform/TransformProcessedBucketLog.kt
index 6ba6232b2..adc2489ef 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/transform/TransformProcessedBucketLog.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/transform/TransformProcessedBucketLog.kt
@@ -23,26 +23,24 @@ class TransformProcessedBucketLog {
         }
     }
 
-    fun addBucket(bucket: Map<String, Any>) {
+    private fun addBucket(bucket: Map<String, Any>) {
         if (processedBuckets.size >= MAX_SIZE) return
         processedBuckets.add(computeBucketHash(bucket))
     }
 
-    fun isProcessed(bucket: Map<String, Any>): Boolean {
+    private fun isProcessed(bucket: Map<String, Any>): Boolean {
         return processedBuckets.contains(computeBucketHash(bucket))
     }
 
     fun isNotProcessed(bucket: Map<String, Any>) = !isProcessed(bucket)
 
-    fun computeBucketHash(bucket: Map<String, Any>): String {
+    private fun computeBucketHash(bucket: Map<String, Any?>): String {
         val md5Crypt = MessageDigest.getInstance("MD5")
-        bucket.entries.sortedBy { it.key }.also {
-            it.forEach { entry ->
-                md5Crypt.update(
-                    if (entry.value == null) "null".toByteArray()
-                    else entry.value.toString().toByteArray()
-                )
-            }
+        bucket.entries.sortedBy { it.key }.onEach { entry ->
+            md5Crypt.update(
+                if (entry.value == null) "null".toByteArray()
+                else entry.value.toString().toByteArray()
+            )
         }
         return BigInteger(1, md5Crypt.digest()).toString(HEX_RADIX)
     }
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/transform/TransformSearchService.kt b/src/main/kotlin/org/opensearch/indexmanagement/transform/TransformSearchService.kt
index bd8915089..0330aa952 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/transform/TransformSearchService.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/transform/TransformSearchService.kt
@@ -337,7 +337,7 @@ class TransformSearchService(
         ): TransformSearchResult {
             val aggs = searchResponse.aggregations.get(transform.id) as CompositeAggregation
             val buckets = if (modifiedBuckets != null) aggs.buckets.filter { modifiedBuckets.contains(it.key) } else aggs.buckets
-            val documentsProcessed = buckets.fold(0L) { sum, it -> sum + it.docCount }
+            val documentsProcessed = buckets.fold(0L) { sum, bucket -> sum + bucket.docCount }
             val pagesProcessed = 1L
             val searchTime = searchResponse.took.millis
             val stats = TransformStats(pagesProcessed, documentsProcessed, 0, 0, searchTime)
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/transform/action/delete/TransportDeleteTransformsAction.kt b/src/main/kotlin/org/opensearch/indexmanagement/transform/action/delete/TransportDeleteTransformsAction.kt
index 913229246..5da2fc554 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/transform/action/delete/TransportDeleteTransformsAction.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/transform/action/delete/TransportDeleteTransformsAction.kt
@@ -108,7 +108,7 @@ class TransportDeleteTransformsAction @Inject constructor(
             }
         }
 
-        @Suppress("LongMethod")
+        @Suppress("LongMethod", "NestedBlockDepth")
         private fun bulkDelete(response: MultiGetResponse, ids: List<String>, forceDelete: Boolean, actionListener: ActionListener<BulkResponse>) {
             val enabledIDs = mutableListOf<String>()
             val notTransform = mutableListOf<String>()
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/transform/action/get/TransportGetTransformsAction.kt b/src/main/kotlin/org/opensearch/indexmanagement/transform/action/get/TransportGetTransformsAction.kt
index 96ad989d0..a4801eafe 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/transform/action/get/TransportGetTransformsAction.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/transform/action/get/TransportGetTransformsAction.kt
@@ -76,6 +76,7 @@ class TransportGetTransformsAction @Inject constructor(
             .sort(sortField, SortOrder.fromString(sortDirection))
 
         client.threadPool().threadContext.stashContext().use {
+            @Suppress("UNCHECKED_CAST")
             getJobs(
                 client,
                 searchSourceBuilder,
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/transform/action/index/TransportIndexTransformAction.kt b/src/main/kotlin/org/opensearch/indexmanagement/transform/action/index/TransportIndexTransformAction.kt
index 373530386..fc8f632f8 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/transform/action/index/TransportIndexTransformAction.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/transform/action/index/TransportIndexTransformAction.kt
@@ -146,7 +146,6 @@ class TransportIndexTransformAction @Inject constructor(
             if (transform.dataSelectionQuery != newTransform.dataSelectionQuery) modified.add(Transform.DATA_SELECTION_QUERY_FIELD)
             if (transform.groups != newTransform.groups) modified.add(Transform.GROUPS_FIELD)
             if (transform.aggregations != newTransform.aggregations) modified.add(Transform.AGGREGATIONS_FIELD)
-            if (transform.roles != newTransform.roles) modified.add(Transform.ROLES_FIELD)
             if (transform.continuous != newTransform.continuous) modified.add(Transform.CONTINUOUS_FIELD)
             return modified.toList()
         }
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/transform/model/Transform.kt b/src/main/kotlin/org/opensearch/indexmanagement/transform/model/Transform.kt
index fc382c630..f87085757 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/transform/model/Transform.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/transform/model/Transform.kt
@@ -149,7 +149,7 @@ data class Transform(
         out.writeString(sourceIndex)
         out.writeOptionalNamedWriteable(dataSelectionQuery)
         out.writeString(targetIndex)
-        out.writeStringArray(roles.toTypedArray())
+        out.writeStringArray(emptyList<String>().toTypedArray())
         out.writeInt(pageSize)
         out.writeVInt(groups.size)
         for (group in groups) {
@@ -170,12 +170,12 @@ data class Transform(
         return if (includeId) {
             mutableMapOf(
                 TRANSFORM_DOC_ID_FIELD to this.id,
-                _DOC_COUNT to docCount,
+                DOC_COUNT to docCount,
                 TRANSFORM_DOC_COUNT_FIELD to docCount
             )
         } else {
             mutableMapOf(
-                _DOC_COUNT to docCount,
+                DOC_COUNT to docCount,
                 TRANSFORM_DOC_COUNT_FIELD to docCount
             )
         }
@@ -288,7 +288,7 @@ data class Transform(
         const val MAXIMUM_PAGE_SIZE_CONTINUOUS = 1_000
         const val MINIMUM_JOB_INTERVAL = 1
         const val TRANSFORM_DOC_ID_FIELD = "$TRANSFORM_TYPE._id"
-        const val _DOC_COUNT = "_doc_count"
+        const val DOC_COUNT = "_doc_count"
         // Keeping the field in order to be backward compatible
         const val TRANSFORM_DOC_COUNT_FIELD = "$TRANSFORM_TYPE._doc_count"
         const val CONTINUOUS_FIELD = "continuous"
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/transform/opensearchapi/OpenSearchExtensions.kt b/src/main/kotlin/org/opensearch/indexmanagement/transform/opensearchapi/OpenSearchExtensions.kt
index c9b062a7a..3df66f16f 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/transform/opensearchapi/OpenSearchExtensions.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/transform/opensearchapi/OpenSearchExtensions.kt
@@ -70,6 +70,7 @@ fun isRetryable(
  * Retries on 408 or on TaskCancelledException once the message matches the given pattern.
  * In that case, retry request with reduced size param and timeout param is set based on the lock expiration
  */
+@Suppress("ReturnCount")
 fun isTransformOperationTimedOut(ex: OpenSearchException): Boolean {
     if (RestStatus.REQUEST_TIMEOUT == ex.status()) {
         return true
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/util/JobSchedulerUtils.kt b/src/main/kotlin/org/opensearch/indexmanagement/util/JobSchedulerUtils.kt
index ad6023f2d..3157f7631 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/util/JobSchedulerUtils.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/util/JobSchedulerUtils.kt
@@ -13,7 +13,7 @@ import org.opensearch.jobscheduler.spi.JobExecutionContext
 import org.opensearch.jobscheduler.spi.LockModel
 import org.opensearch.jobscheduler.spi.ScheduledJobParameter
 
-private val logger = LogManager.getLogger("JobSchedulerUtils")
+private val logger = LogManager.getLogger("o.o.i.u.JobSchedulerUtils")
 
 /**
  * Util method to attempt to get the lock on the requested scheduled job using the backoff policy.
diff --git a/src/main/kotlin/org/opensearch/indexmanagement/util/ScheduledJobUtils.kt b/src/main/kotlin/org/opensearch/indexmanagement/util/ScheduledJobUtils.kt
index 7eb414e76..70e849bfb 100644
--- a/src/main/kotlin/org/opensearch/indexmanagement/util/ScheduledJobUtils.kt
+++ b/src/main/kotlin/org/opensearch/indexmanagement/util/ScheduledJobUtils.kt
@@ -66,6 +66,7 @@ fun getJobs(
     )
 }
 
+@Suppress("UNCHECKED_CAST")
 private fun populateResponse(
     jobType: String,
     jobs: List<Any>,
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/IndexManagementIndicesIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/IndexManagementIndicesIT.kt
index 34e68cfa9..123c89007 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/IndexManagementIndicesIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/IndexManagementIndicesIT.kt
@@ -71,8 +71,7 @@ class IndexManagementIndicesIT : IndexStateManagementRestTestCase() {
     }
 
     fun `test update management index mapping with new schema version`() {
-        wipeAllODFEIndices()
-        waitForPendingTasks(adminClient())
+        wipeAllIndices()
         assertIndexDoesNotExist(INDEX_MANAGEMENT_INDEX)
 
         val mapping = indexManagementMappings.trim().trimStart('{').trimEnd('}')
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/IndexManagementRestTestCase.kt b/src/test/kotlin/org/opensearch/indexmanagement/IndexManagementRestTestCase.kt
index db7ce6a7b..eba7db734 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/IndexManagementRestTestCase.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/IndexManagementRestTestCase.kt
@@ -10,20 +10,31 @@ import org.apache.http.entity.StringEntity
 import org.junit.AfterClass
 import org.junit.Before
 import org.junit.rules.DisableOnDebug
+import org.opensearch.action.admin.cluster.node.tasks.list.ListTasksAction
 import org.opensearch.client.Request
-import org.opensearch.client.RequestOptions
 import org.opensearch.client.Response
 import org.opensearch.client.RestClient
+import org.opensearch.client.RequestOptions
+import org.opensearch.client.WarningsHandler
+import org.opensearch.client.ResponseException
 import org.opensearch.common.Strings
+import org.opensearch.common.collect.Set
 import org.opensearch.common.io.PathUtils
 import org.opensearch.common.settings.Settings
+import org.opensearch.common.xcontent.DeprecationHandler
+import org.opensearch.common.xcontent.NamedXContentRegistry
+import org.opensearch.common.xcontent.XContentType
 import org.opensearch.indexmanagement.indexstatemanagement.util.INDEX_HIDDEN
 import org.opensearch.rest.RestStatus
+import java.io.IOException
 import java.nio.file.Files
+import java.util.*
 import javax.management.MBeanServerInvocationHandler
 import javax.management.ObjectName
 import javax.management.remote.JMXConnectorFactory
 import javax.management.remote.JMXServiceURL
+import kotlin.collections.ArrayList
+import kotlin.collections.HashSet
 
 abstract class IndexManagementRestTestCase : ODFERestTestCase() {
 
@@ -57,7 +68,6 @@ abstract class IndexManagementRestTestCase : ODFERestTestCase() {
 
     protected val isDebuggingTest = DisableOnDebug(null).isDebugging
     protected val isDebuggingRemoteCluster = System.getProperty("cluster.debug", "false")!!.toBoolean()
-    protected val isMultiNode = System.getProperty("cluster.number_of_nodes", "1").toInt() > 1
 
     protected val isLocalTest = clusterName() == "integTest"
     private fun clusterName(): String {
@@ -138,6 +148,7 @@ abstract class IndexManagementRestTestCase : ODFERestTestCase() {
         insertSampleBulkData(index, javaClass.classLoader.getResource("data/nyc_5000.ndjson").readText())
     }
 
+    @Suppress("UNCHECKED_CAST")
     protected fun extractFailuresFromSearchResponse(searchResponse: Response): List<Map<String, String>?>? {
         val shards = searchResponse.asMap()["_shards"] as Map<String, ArrayList<Map<String, Any>>>
         assertNotNull(shards)
@@ -152,7 +163,115 @@ abstract class IndexManagementRestTestCase : ODFERestTestCase() {
         }
     }
 
+    override fun preserveIndicesUponCompletion(): Boolean = true
     companion object {
+        @JvmStatic
+        protected val isMultiNode = System.getProperty("cluster.number_of_nodes", "1").toInt() > 1
+        protected val defaultKeepIndexSet = setOf(".opendistro_security")
+        /**
+         * We override preserveIndicesUponCompletion to true and use this function to clean up indices
+         * Meant to be used in @After or @AfterClass of your feature test suite
+         */
+        fun wipeAllIndices(client: RestClient = adminClient(), keepIndex: kotlin.collections.Set<String> = defaultKeepIndexSet) {
+            try {
+                client.performRequest(Request("DELETE", "_data_stream/*"))
+            } catch (e: ResponseException) {
+                // We hit a version of ES that doesn't serialize DeleteDataStreamAction.Request#wildcardExpressionsOriginallySpecified field or
+                // that doesn't support data streams so it's safe to ignore
+                val statusCode = e.response.statusLine.statusCode
+                if (!Set.of(404, 405, 500).contains(statusCode)) {
+                    throw e
+                }
+            }
+
+            val response = client.performRequest(Request("GET", "/_cat/indices?format=json&expand_wildcards=all"))
+            val xContentType = XContentType.fromMediaType(response.entity.contentType.value)
+            xContentType.xContent().createParser(
+                NamedXContentRegistry.EMPTY, DeprecationHandler.THROW_UNSUPPORTED_OPERATION,
+                response.entity.content
+            ).use { parser ->
+                for (index in parser.list()) {
+                    val jsonObject: Map<*, *> = index as java.util.HashMap<*, *>
+                    val indexName: String = jsonObject["index"] as String
+                    // .opendistro_security isn't allowed to delete from cluster
+                    if (!keepIndex.contains(indexName)) {
+                        val request = Request("DELETE", "/$indexName")
+                        // TODO: remove PERMISSIVE option after moving system index access to REST API call
+                        val options = RequestOptions.DEFAULT.toBuilder()
+                        options.setWarningsHandler(WarningsHandler.PERMISSIVE)
+                        request.options = options.build()
+                        client.performRequest(request)
+                    }
+                }
+            }
+
+            waitFor {
+                if (!isMultiNode) {
+                    waitForRunningTasks(client)
+                    waitForPendingTasks(client)
+                    waitForThreadPools(client)
+                } else {
+                    // Multi node test is not suitable to waitFor
+                    // We have seen long-running write task that fails the waitFor
+                    //  probably because of cluster manager - data node task not in sync
+                    // So instead we just sleep 1s after wiping indices
+                    Thread.sleep(1_000)
+                }
+            }
+        }
+
+        @JvmStatic
+        @Throws(IOException::class)
+        protected fun waitForRunningTasks(client: RestClient) {
+            val runningTasks: MutableSet<String> = runningTasks(client.performRequest(Request("GET", "/_tasks?detailed")))
+            if (runningTasks.isEmpty()) {
+                return
+            }
+            val stillRunning = ArrayList<String>(runningTasks)
+            fail("${Date()}: There are still tasks running after this test that might break subsequent tests: \n${stillRunning.joinToString("\n")}.")
+        }
+
+        @Suppress("UNCHECKED_CAST")
+        @Throws(IOException::class)
+        private fun runningTasks(response: Response): MutableSet<String> {
+            val runningTasks: MutableSet<String> = HashSet()
+            val nodes = entityAsMap(response)["nodes"] as Map<String, Any>?
+            for ((_, value) in nodes!!) {
+                val nodeInfo = value as Map<String, Any>
+                val nodeTasks = nodeInfo["tasks"] as Map<String, Any>?
+                for ((_, value1) in nodeTasks!!) {
+                    val task = value1 as Map<String, Any>
+                    // Ignore the task list API - it doesn't count against us
+                    if (task["action"] == ListTasksAction.NAME || task["action"] == ListTasksAction.NAME + "[n]") continue
+                    // runningTasks.add(task["action"].toString() + " | " + task["description"].toString())
+                    runningTasks.add(task.toString())
+                }
+            }
+            return runningTasks
+        }
+
+        @JvmStatic
+        protected fun waitForThreadPools(client: RestClient) {
+            val response = client.performRequest(Request("GET", "/_cat/thread_pool?format=json"))
+
+            val xContentType = XContentType.fromMediaType(response.entity.contentType.value)
+            xContentType.xContent().createParser(
+                NamedXContentRegistry.EMPTY, DeprecationHandler.THROW_UNSUPPORTED_OPERATION,
+                response.entity.content
+            ).use { parser ->
+                for (index in parser.list()) {
+                    val jsonObject: Map<*, *> = index as java.util.HashMap<*, *>
+                    val active = (jsonObject["active"] as String).toInt()
+                    val queue = (jsonObject["queue"] as String).toInt()
+                    val name = jsonObject["name"]
+                    val trueActive = if (name == "management") active - 1 else active
+                    if (trueActive > 0 || queue > 0) {
+                        fail("Still active threadpools in cluster: $jsonObject")
+                    }
+                }
+            }
+        }
+
         internal interface IProxy {
             val version: String?
             var sessionId: String?
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/IndexStateManagementSecurityBehaviorIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/IndexStateManagementSecurityBehaviorIT.kt
index 9fc774551..523dfe0e4 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/IndexStateManagementSecurityBehaviorIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/IndexStateManagementSecurityBehaviorIT.kt
@@ -52,10 +52,6 @@ class IndexStateManagementSecurityBehaviorIT : SecurityRestTestCase() {
     private val testRole = "test_role"
     var testClient: RestClient? = null
 
-    override fun preserveIndicesUponCompletion(): Boolean {
-        return true
-    }
-
     @Before
     fun setupUsersAndRoles() {
         updateClusterSetting(ManagedIndexSettings.JITTER.key, "0.0", false)
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/ODFERestTestCase.kt b/src/test/kotlin/org/opensearch/indexmanagement/ODFERestTestCase.kt
index 64b1a232e..fa1a77a92 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/ODFERestTestCase.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/ODFERestTestCase.kt
@@ -6,18 +6,9 @@
 package org.opensearch.indexmanagement
 
 import org.apache.http.HttpHost
-import org.junit.After
-import org.opensearch.action.admin.cluster.node.tasks.list.ListTasksAction
-import org.opensearch.client.Request
-import org.opensearch.client.RequestOptions
-import org.opensearch.client.Response
 import org.opensearch.client.RestClient
-import org.opensearch.client.WarningsHandler
 import org.opensearch.common.io.PathUtils
 import org.opensearch.common.settings.Settings
-import org.opensearch.common.xcontent.DeprecationHandler
-import org.opensearch.common.xcontent.NamedXContentRegistry
-import org.opensearch.common.xcontent.XContentType
 import org.opensearch.commons.ConfigConstants.OPENSEARCH_SECURITY_SSL_HTTP_ENABLED
 import org.opensearch.commons.ConfigConstants.OPENSEARCH_SECURITY_SSL_HTTP_KEYSTORE_FILEPATH
 import org.opensearch.commons.ConfigConstants.OPENSEARCH_SECURITY_SSL_HTTP_KEYSTORE_KEYPASSWORD
@@ -35,99 +26,6 @@ abstract class ODFERestTestCase : OpenSearchRestTestCase() {
 
     override fun getProtocol(): String = if (isHttps()) "https" else "http"
 
-    @Suppress("UNCHECKED_CAST")
-    @Throws(IOException::class)
-    private fun runningTasks(response: Response): MutableSet<String> {
-        val runningTasks: MutableSet<String> = HashSet()
-        val nodes = entityAsMap(response)["nodes"] as Map<String, Any>?
-        for ((_, value) in nodes!!) {
-            val nodeInfo = value as Map<String, Any>
-            val nodeTasks = nodeInfo["tasks"] as Map<String, Any>?
-            for ((_, value1) in nodeTasks!!) {
-                val task = value1 as Map<String, Any>
-                runningTasks.add(task["action"].toString())
-            }
-        }
-        return runningTasks
-    }
-
-    @After
-    fun waitForCleanup() {
-        waitFor {
-            waitForRunningTasks()
-            waitForThreadPools()
-            waitForPendingTasks(adminClient())
-        }
-    }
-
-    @Throws(IOException::class)
-    private fun waitForRunningTasks() {
-        val runningTasks: MutableSet<String> = runningTasks(adminClient().performRequest(Request("GET", "/_tasks")))
-        // Ignore the task list API - it doesn't count against us
-        runningTasks.remove(ListTasksAction.NAME)
-        runningTasks.remove(ListTasksAction.NAME + "[n]")
-        if (runningTasks.isEmpty()) {
-            return
-        }
-        val stillRunning = ArrayList<String>(runningTasks)
-        fail("There are still tasks running after this test that might break subsequent tests $stillRunning.")
-    }
-
-    private fun waitForThreadPools() {
-        waitFor {
-            val response = client().performRequest(Request("GET", "/_cat/thread_pool?format=json"))
-
-            val xContentType = XContentType.fromMediaType(response.entity.contentType.value)
-            xContentType.xContent().createParser(
-                NamedXContentRegistry.EMPTY, DeprecationHandler.THROW_UNSUPPORTED_OPERATION,
-                response.entity.content
-            ).use { parser ->
-                for (index in parser.list()) {
-                    val jsonObject: Map<*, *> = index as java.util.HashMap<*, *>
-                    val active = (jsonObject["active"] as String).toInt()
-                    val queue = (jsonObject["queue"] as String).toInt()
-                    val name = jsonObject["name"]
-                    val trueActive = if (name == "management") active - 1 else active
-                    if (trueActive > 0 || queue > 0) {
-                        fail("Still active threadpools in cluster: $jsonObject")
-                    }
-                }
-            }
-        }
-    }
-
-    open fun preserveODFEIndicesAfterTest(): Boolean = false
-
-    @Throws(IOException::class)
-    open fun wipeAllODFEIndices() {
-        if (preserveODFEIndicesAfterTest()) return
-
-        // Delete all data stream indices
-        client().performRequest(Request("DELETE", "/_data_stream/*"))
-
-        // Delete all indices
-        val response = client().performRequest(Request("GET", "/_cat/indices?format=json&expand_wildcards=all"))
-
-        val xContentType = XContentType.fromMediaType(response.entity.contentType.value)
-        xContentType.xContent().createParser(
-            NamedXContentRegistry.EMPTY, DeprecationHandler.THROW_UNSUPPORTED_OPERATION,
-            response.entity.content
-        ).use { parser ->
-            for (index in parser.list()) {
-                val jsonObject: Map<*, *> = index as java.util.HashMap<*, *>
-                val indexName: String = jsonObject["index"] as String
-                // .opendistro_security isn't allowed to delete from cluster
-                if (".opendistro_security" != indexName) {
-                    val request = Request("DELETE", "/$indexName")
-                    // TODO: remove PERMISSIVE option after moving system index access to REST API call
-                    val options = RequestOptions.DEFAULT.toBuilder()
-                    options.setWarningsHandler(WarningsHandler.PERMISSIVE)
-                    request.options = options.build()
-                    adminClient().performRequest(request)
-                }
-            }
-        }
-    }
     /**
      * Returns the REST client settings used for super-admin actions like cleaning up after the test has completed.
      */
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/RollupSecurityBehaviorIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/RollupSecurityBehaviorIT.kt
index 79d66cd3c..edcff6b18 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/RollupSecurityBehaviorIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/RollupSecurityBehaviorIT.kt
@@ -43,10 +43,6 @@ class RollupSecurityBehaviorIT : SecurityRestTestCase() {
     private val testRole = "test_role"
     var testUserClient: RestClient? = null
 
-    override fun preserveIndicesUponCompletion(): Boolean {
-        return true
-    }
-
     @Before
     fun setupUsersAndRoles() {
         updateClusterSetting(ManagedIndexSettings.JITTER.key, "0.0", false)
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/SecurityBehaviorIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/SecurityBehaviorIT.kt
index 8beff5aad..fc203442a 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/SecurityBehaviorIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/SecurityBehaviorIT.kt
@@ -26,10 +26,6 @@ class SecurityBehaviorIT : SecurityRestTestCase() {
     private val john = "john"
     private var johnClient: RestClient? = null
 
-    override fun preserveIndicesUponCompletion(): Boolean {
-        return true
-    }
-
     @Before
     fun setupUsersAndRoles() {
         updateClusterSetting(ManagedIndexSettings.JITTER.key, "0.0", false)
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/TransformSecurityBehaviorIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/TransformSecurityBehaviorIT.kt
index e46add04d..77d84323e 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/TransformSecurityBehaviorIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/TransformSecurityBehaviorIT.kt
@@ -37,10 +37,6 @@ class TransformSecurityBehaviorIT : SecurityRestTestCase() {
     private val testRole = "test_role"
     var testUserClient: RestClient? = null
 
-    override fun preserveIndicesUponCompletion(): Boolean {
-        return true
-    }
-
     @Before
     fun setupUsersAndRoles() {
         updateClusterSetting(ManagedIndexSettings.JITTER.key, "0.0", false)
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/bwc/IndexManagementBackwardsCompatibilityIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/bwc/IndexManagementBackwardsCompatibilityIT.kt
index 630fcca42..84344d181 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/bwc/IndexManagementBackwardsCompatibilityIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/bwc/IndexManagementBackwardsCompatibilityIT.kt
@@ -36,8 +36,6 @@ class IndexManagementBackwardsCompatibilityIT : IndexManagementRestTestCase() {
 
     override fun preserveTemplatesUponCompletion(): Boolean = true
 
-    override fun preserveODFEIndicesAfterTest(): Boolean = true
-
     override fun restClientSettings(): Settings {
         return Settings.builder()
             .put(super.restClientSettings())
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementIntegTestCase.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementIntegTestCase.kt
index 540049fe1..798c8eb1a 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementIntegTestCase.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementIntegTestCase.kt
@@ -7,6 +7,7 @@ package org.opensearch.indexmanagement.indexstatemanagement
 
 import org.apache.http.entity.ContentType
 import org.apache.http.entity.StringEntity
+import org.junit.After
 import org.junit.Before
 import org.opensearch.OpenSearchParseException
 import org.opensearch.action.ActionRequest
@@ -28,6 +29,7 @@ import org.opensearch.common.xcontent.XContentParserUtils
 import org.opensearch.common.xcontent.XContentType
 import org.opensearch.common.xcontent.json.JsonXContent
 import org.opensearch.indexmanagement.IndexManagementPlugin
+import org.opensearch.indexmanagement.IndexManagementRestTestCase.Companion.wipeAllIndices
 import org.opensearch.indexmanagement.indexstatemanagement.model.ManagedIndexConfig
 import org.opensearch.indexmanagement.indexstatemanagement.model.Policy
 import org.opensearch.indexmanagement.indexstatemanagement.resthandler.RestExplainAction
@@ -55,6 +57,12 @@ import java.time.Duration
 import java.time.Instant
 
 abstract class IndexStateManagementIntegTestCase : OpenSearchIntegTestCase() {
+
+    @After
+    fun clearIndicesAfterEachTest() {
+        wipeAllIndices(getRestClient())
+    }
+
     @Before
     fun disableIndexStateManagementJitter() {
         // jitter would add a test-breaking delay to the integration tests
@@ -275,11 +283,10 @@ abstract class IndexStateManagementIntegTestCase : OpenSearchIntegTestCase() {
             xcp.nextToken(),
             xcp
         )
-        var totalManagedIndices = 0
         while (xcp.nextToken() != XContentParser.Token.END_OBJECT) {
             xcp.currentName()
             xcp.nextToken()
-            if (xcp.currentName() == TOTAL_MANAGED_INDICES) totalManagedIndices = xcp.intValue()
+            if (xcp.currentName() == TOTAL_MANAGED_INDICES) xcp.intValue()
             else metadata = ManagedIndexMetaData.parse(xcp)
         }
         return metadata
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementRestTestCase.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementRestTestCase.kt
index 4a582f130..17d0c9cce 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementRestTestCase.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/IndexStateManagementRestTestCase.kt
@@ -10,6 +10,7 @@ import org.apache.http.HttpHeaders
 import org.apache.http.entity.ContentType.APPLICATION_JSON
 import org.apache.http.entity.StringEntity
 import org.apache.http.message.BasicHeader
+import org.junit.After
 import org.junit.Before
 import org.opensearch.OpenSearchParseException
 import org.opensearch.action.get.GetResponse
@@ -74,6 +75,11 @@ import java.util.Locale
 
 abstract class IndexStateManagementRestTestCase : IndexManagementRestTestCase() {
 
+    @After
+    fun clearIndicesAfterEachTest() {
+        wipeAllIndices()
+    }
+
     val explainResponseOpendistroPolicyIdSetting = "index.opendistro.index_state_management.policy_id"
     val explainResponseOpenSearchPolicyIdSetting = "index.plugins.index_state_management.policy_id"
 
@@ -476,7 +482,7 @@ abstract class IndexStateManagementRestTestCase : IndexManagementRestTestCase()
     // Validate segment count per shard by specifying the min and max it should be
     @Suppress("UNCHECKED_CAST", "ReturnCount")
     protected fun validateSegmentCount(index: String, min: Int? = null, max: Int? = null): Boolean {
-        if (min == null && max == null) throw IllegalArgumentException("Must provide at least a min or max")
+        require(min != null || max != null) { "Must provide at least a min or max" }
         val statsResponse: Map<String, Any> = getShardSegmentStats(index)
 
         val indicesStats = statsResponse["indices"] as Map<String, Map<String, Map<String, List<Map<String, Map<String, Any?>>>>>>
@@ -942,6 +948,7 @@ abstract class IndexStateManagementRestTestCase : IndexManagementRestTestCase()
         return true
     }
 
+    @Suppress("UNCHECKED_CAST")
     protected fun assertPredicatesOnISMTemplatesMap(
         templatePredicates: List<Pair<String, List<Pair<String, (Any?) -> Boolean>>>>, // response map name: predicate
         response: Map<String, Any?>
@@ -957,6 +964,7 @@ abstract class IndexStateManagementRestTestCase : IndexManagementRestTestCase()
         }
     }
 
+    @Suppress("UNCHECKED_CAST")
     protected fun assertISMTemplateEquals(expected: ISMTemplate, actualISMTemplateMap: Any?): Boolean {
         actualISMTemplateMap as Map<String, Any>
         assertEquals(expected.indexPatterns, actualISMTemplateMap[ISMTemplate.INDEX_PATTERN])
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/MetadataRegressionIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/MetadataRegressionIT.kt
index c7e83c874..e18aa6c33 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/MetadataRegressionIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/MetadataRegressionIT.kt
@@ -88,7 +88,9 @@ class MetadataRegressionIT : IndexStateManagementIntegTestCase() {
         indexMetadata = getIndexMetadata(indexName)
         logger.info("check if metadata is saved in cluster state: ${indexMetadata.getCustomData("managed_index_metadata")}")
 
-        waitFor {
+        // TODO increase wait time since flaky seeing here. After looking through the log
+        //  it's more likely a test framework execution lag.
+        waitFor(Instant.ofEpochSecond(60)) {
             assertEquals(
                 METADATA_MOVING_WARNING,
                 getExplainManagedIndexMetaData(indexName).info?.get("message")
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/action/ActionTimeoutIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/action/ActionTimeoutIT.kt
index a924dc637..551132009 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/action/ActionTimeoutIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/action/ActionTimeoutIT.kt
@@ -5,7 +5,6 @@
 
 package org.opensearch.indexmanagement.indexstatemanagement.action
 
-import org.hamcrest.collection.IsMapContaining
 import org.opensearch.indexmanagement.indexstatemanagement.IndexStateManagementRestTestCase
 import org.opensearch.indexmanagement.indexstatemanagement.step.open.AttemptOpenStep
 import org.opensearch.indexmanagement.indexstatemanagement.step.rollover.AttemptRolloverStep
@@ -41,10 +40,10 @@ class ActionTimeoutIT : IndexStateManagementRestTestCase() {
         // the second execution we move into rollover action, we won't hit the timeout as this is the execution that sets the startTime
         updateManagedIndexConfigStartTime(managedIndexConfig)
         waitFor {
-            assertThat(
+            assertEquals(
                 "Should be attempting to rollover",
-                getExplainManagedIndexMetaData(indexName).info,
-                IsMapContaining.hasEntry("message", AttemptRolloverStep.getPendingMessage(indexName) as Any?)
+                getExplainManagedIndexMetaData(indexName).info?.get("message"),
+                AttemptRolloverStep.getPendingMessage(indexName)
             )
         }
 
@@ -72,8 +71,8 @@ class ActionTimeoutIT : IndexStateManagementRestTestCase() {
 
     // https://github.com/opendistro-for-elasticsearch/index-management/issues/130
     fun `test action timeout doesn't bleed over into next action`() {
-        val indexName = "${testIndexName}_index_1"
-        val policyID = "${testIndexName}_testPolicyName_1"
+        val indexName = "${testIndexName}_index_2"
+        val policyID = "${testIndexName}_testPolicyName_2"
         val testPolicy = """
         {"policy":{"description":"Default policy","default_state":"rolloverstate","states":[
         {"name":"rolloverstate","actions":[{"timeout": "5s","open":{}},{"timeout":"1s","rollover":{"min_doc_count":100}}],
@@ -110,10 +109,10 @@ class ActionTimeoutIT : IndexStateManagementRestTestCase() {
         // but there was a bug before where it would use the startTime from the previous actions metadata and immediately fail
         updateManagedIndexConfigStartTime(managedIndexConfig)
         waitFor {
-            assertThat(
+            assertEquals(
                 "Should be attempting to rollover",
-                getExplainManagedIndexMetaData(indexName).info,
-                IsMapContaining.hasEntry("message", AttemptRolloverStep.getPendingMessage(indexName) as Any?)
+                getExplainManagedIndexMetaData(indexName).info?.get("message"),
+                AttemptRolloverStep.getPendingMessage(indexName)
             )
         }
     }
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/action/RolloverActionIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/action/RolloverActionIT.kt
index cc3cc057d..59d408f74 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/action/RolloverActionIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/action/RolloverActionIT.kt
@@ -7,7 +7,6 @@ package org.opensearch.indexmanagement.indexstatemanagement.action
 
 import org.apache.http.entity.ContentType
 import org.apache.http.entity.StringEntity
-import org.hamcrest.core.Is.isA
 import org.junit.Assert
 import org.opensearch.cluster.metadata.DataStream
 import org.opensearch.common.settings.Settings
@@ -172,7 +171,7 @@ class RolloverActionIT : IndexStateManagementRestTestCase() {
             val minSize = conditions[RolloverAction.MIN_SIZE_FIELD] as Map<String, Any?>
             val minDocCount = conditions[RolloverAction.MIN_DOC_COUNT_FIELD] as Map<String, Any?>
             assertEquals("Did not have min size condition", "10b", minSize["condition"])
-            assertThat("Did not have min size current", minSize["current"], isA(String::class.java))
+            assertTrue("Did not have min size current", minSize["current"] is String)
             assertEquals("Did not have min doc count condition", 1000000, minDocCount["condition"])
             assertEquals("Did not have min doc count current", 0, minDocCount["current"])
         }
@@ -192,7 +191,7 @@ class RolloverActionIT : IndexStateManagementRestTestCase() {
             val minSize = conditions[RolloverAction.MIN_SIZE_FIELD] as Map<String, Any?>
             val minDocCount = conditions[RolloverAction.MIN_DOC_COUNT_FIELD] as Map<String, Any?>
             assertEquals("Did not have min size condition", "10b", minSize["condition"])
-            assertThat("Did not have min size current", minSize["current"], isA(String::class.java))
+            assertTrue("Did not have min size current", minSize["current"] is String)
             assertEquals("Did not have min doc count condition", 1000000, minDocCount["condition"])
             assertEquals("Did not have min doc count current", 5, minDocCount["current"])
         }
@@ -268,7 +267,7 @@ class RolloverActionIT : IndexStateManagementRestTestCase() {
             )
             val minPrimarySize = conditions[RolloverAction.MIN_PRIMARY_SHARD_SIZE_FIELD] as Map<String, Any?>
             assertEquals("Did not have min size condition", "100kb", minPrimarySize["condition"])
-            assertThat("Did not have min size current", minPrimarySize["current"], isA(String::class.java))
+            assertTrue("Did not have min size current", minPrimarySize["current"] is String)
         }
 
         val kb150 = 150_000
@@ -283,6 +282,8 @@ class RolloverActionIT : IndexStateManagementRestTestCase() {
             flush(firstIndex, true)
             forceMerge(firstIndex, "1")
             val primaryShards = (cat("shards/$firstIndex?format=json&bytes=b") as List<Map<String, Any>>).filter { it["prirep"] == "p" }
+            // TODO seeing flakyness of multiple shards over 100kb, log out shards to further debug
+            logger.info("cat shards result: $primaryShards")
             val primaryShardsOver100KB = primaryShards.filter { (it["store"] as String).toInt() > 100000 }
             assertTrue("Found multiple shards over 100kb", primaryShardsOver100KB.size == 1)
             primaryShardSizeBytes = primaryShards.maxOf { (it["store"] as String).toInt() }
@@ -300,7 +301,7 @@ class RolloverActionIT : IndexStateManagementRestTestCase() {
             )
             val minPrimaryShardSize = conditions[RolloverAction.MIN_PRIMARY_SHARD_SIZE_FIELD] as Map<String, Any?>
             assertEquals("Did not have min primary shard size condition", "100kb", minPrimaryShardSize["condition"])
-            assertThat("Did not have min primary shard size current", minPrimaryShardSize["current"], isA(String::class.java))
+            assertTrue("Did not have min primary shard size current", minPrimaryShardSize["current"] is String)
         }
         assertTrue("New rollover index does not exist.", indexExists("$indexNameBase-000002"))
     }
@@ -349,7 +350,7 @@ class RolloverActionIT : IndexStateManagementRestTestCase() {
             val minAge = conditions[RolloverAction.MIN_INDEX_AGE_FIELD] as Map<String, Any?>
             val minDocCount = conditions[RolloverAction.MIN_DOC_COUNT_FIELD] as Map<String, Any?>
             assertEquals("Did not have min age condition", "2d", minAge["condition"])
-            assertThat("Did not have min age current", minAge["current"], isA(String::class.java))
+            assertTrue("Did not have min age current", minAge["current"] is String)
             assertEquals("Did not have min doc count condition", 3, minDocCount["condition"])
             assertEquals("Did not have min doc count current", 0, minDocCount["current"])
         }
@@ -369,7 +370,7 @@ class RolloverActionIT : IndexStateManagementRestTestCase() {
             val minAge = conditions[RolloverAction.MIN_INDEX_AGE_FIELD] as Map<String, Any?>
             val minDocCount = conditions[RolloverAction.MIN_DOC_COUNT_FIELD] as Map<String, Any?>
             assertEquals("Did not have min age condition", "2d", minAge["condition"])
-            assertThat("Did not have min age current", minAge["current"], isA(String::class.java))
+            assertTrue("Did not have min age current", minAge["current"] is String)
             assertEquals("Did not have min doc count condition", 3, minDocCount["condition"])
             assertEquals("Did not have min doc count current", 5, minDocCount["current"])
         }
@@ -551,7 +552,7 @@ class RolloverActionIT : IndexStateManagementRestTestCase() {
             val minDocCount = conditions[RolloverAction.MIN_DOC_COUNT_FIELD] as Map<String, Any?>
             assertEquals("Incorrect min age condition", "2d", minAge["condition"])
             assertEquals("Incorrect min docs condition", 3, minDocCount["condition"])
-            assertThat("Missing min age current", minAge["current"], isA(String::class.java))
+            assertTrue("Missing min age current", minAge["current"] is String)
             assertEquals("Incorrect min docs current", 0, minDocCount["current"])
         }
 
@@ -579,7 +580,7 @@ class RolloverActionIT : IndexStateManagementRestTestCase() {
             val minDocCount = conditions[RolloverAction.MIN_DOC_COUNT_FIELD] as Map<String, Any?>
             assertEquals("Incorrect min age condition", "2d", minAge["condition"])
             assertEquals("Incorrect min docs condition", 3, minDocCount["condition"])
-            assertThat("Missing min age current", minAge["current"], isA(String::class.java))
+            assertTrue("Missing min age current", minAge["current"] is String)
             assertEquals("Incorrect min docs current", 5, minDocCount["current"])
         }
 
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/migration/MigrationServicesIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/migration/MigrationServicesIT.kt
index bf727630c..b082352fe 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/migration/MigrationServicesIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/migration/MigrationServicesIT.kt
@@ -131,6 +131,7 @@ class MigrationServicesIT : IndexStateManagementRestTestCase() {
         }
     }
 
+    @Suppress("UNCHECKED_CAST")
     private fun getTemplatesOrder(): List<String?> {
         val order = catIndexTemplates().map {
             val row = it as Map<String, String>
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/ManagedIndexUtilsTests.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/ManagedIndexUtilsTests.kt
index 207ad3845..e21e3d355 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/ManagedIndexUtilsTests.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/util/ManagedIndexUtilsTests.kt
@@ -5,7 +5,6 @@
 
 package org.opensearch.indexmanagement.indexstatemanagement.util
 
-import org.opensearch.action.delete.DeleteRequest
 import org.opensearch.common.bytes.BytesReference
 import org.opensearch.common.unit.ByteSizeValue
 import org.opensearch.common.unit.TimeValue
@@ -28,6 +27,7 @@ import org.opensearch.indexmanagement.opensearchapi.parseWithType
 import org.opensearch.test.OpenSearchTestCase
 import java.time.Instant
 
+@Suppress("UnusedPrivateMember")
 class ManagedIndexUtilsTests : OpenSearchTestCase() {
 
     fun `test create managed index request`() {
@@ -112,7 +112,6 @@ class ManagedIndexUtilsTests : OpenSearchTestCase() {
         assertEquals("Too many requests", 1, requests.size)
         val request = requests.first()
         assertEquals("Incorrect uuid used as document id on request", sweptConfigToDelete.uuid, request.id())
-        assertTrue("Incorrect request type", request is DeleteRequest)
     }
 
     fun `test get swept managed index search request`() {
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateDeleteIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateDeleteIT.kt
index 696989d18..16e063270 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateDeleteIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateDeleteIT.kt
@@ -59,7 +59,7 @@ class ValidateDeleteIT : IndexStateManagementRestTestCase() {
             assertEquals(
                 "Index delete action validation status is RE_VALIDATING.",
                 Validate.ValidationStatus.RE_VALIDATING,
-                data?.validationStatus
+                data.validationStatus
             )
         }
         waitFor {
@@ -67,7 +67,7 @@ class ValidateDeleteIT : IndexStateManagementRestTestCase() {
             assertEquals(
                 "Index delete action validation message is index is write index.",
                 ValidateDelete.getFailedIsWriteIndexMessage(index1),
-                data?.validationMessage
+                data.validationMessage
             )
         }
     }
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateForceMergeIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateForceMergeIT.kt
index a9cfd2940..b44ad9ac3 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateForceMergeIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateForceMergeIT.kt
@@ -68,12 +68,12 @@ class ValidateForceMergeIT : IndexStateManagementRestTestCase() {
             assertEquals(
                 "Index force_merge action validation status is RE_VALIDATING.",
                 Validate.ValidationStatus.PASSED,
-                data?.validationStatus
+                data.validationStatus
             )
             assertEquals(
                 "Index force_merge action validation status is RE_VALIDATING.",
                 ValidateForceMerge.getValidationPassedMessage(indexName),
-                data?.validationMessage
+                data.validationMessage
             )
         }
         waitFor {
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateOpenIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateOpenIT.kt
index f52cbb2ac..0bb00610a 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateOpenIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateOpenIT.kt
@@ -66,7 +66,7 @@ class ValidateOpenIT : IndexStateManagementRestTestCase() {
             assertEquals(
                 "Index open action validation status is PASSED.",
                 Validate.ValidationStatus.PASSED,
-                data?.validationStatus
+                data.validationStatus
             )
         }
     }
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReadOnlyIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReadOnlyIT.kt
index 4d9033609..0bbcf9d81 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReadOnlyIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReadOnlyIT.kt
@@ -64,7 +64,7 @@ class ValidateReadOnlyIT : IndexStateManagementRestTestCase() {
             assertEquals(
                 "Index read cation validation status is PASSED.",
                 Validate.ValidationStatus.PASSED,
-                data?.validationStatus
+                data.validationStatus
             )
         }
     }
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReadWriteIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReadWriteIT.kt
index 25b6aee1c..1b530fb6b 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReadWriteIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReadWriteIT.kt
@@ -73,7 +73,7 @@ class ValidateReadWriteIT : IndexStateManagementRestTestCase() {
             assertEquals(
                 "Index read_write action validation status is PASSED.",
                 Validate.ValidationStatus.PASSED,
-                data?.validationStatus
+                data.validationStatus
             )
         }
     }
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReplicaCountIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReplicaCountIT.kt
index 90c838f80..60f941588 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReplicaCountIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateReplicaCountIT.kt
@@ -63,7 +63,7 @@ class ValidateReplicaCountIT : IndexStateManagementRestTestCase() {
             assertEquals(
                 "Index replica_count action validation status is PASSED.",
                 Validate.ValidationStatus.PASSED,
-                data?.validationStatus
+                data.validationStatus
             )
         }
     }
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateRolloverIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateRolloverIT.kt
index 199a9fc15..f1b20c14f 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateRolloverIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/indexstatemanagement/validation/ValidateRolloverIT.kt
@@ -68,11 +68,11 @@ class ValidateRolloverIT : IndexStateManagementRestTestCase() {
             val data = getExplainValidationResult(index1)
             assertEquals(
                 "Index rollover validation status is pass.",
-                Validate.ValidationStatus.PASSED, data?.validationStatus
+                Validate.ValidationStatus.PASSED, data.validationStatus
             )
             assertEquals(
                 "Index rollover validation message is skipped rollover",
-                ValidateRollover.getSkipRolloverMessage(index1), data?.validationMessage
+                ValidateRollover.getSkipRolloverMessage(index1), data.validationMessage
             )
         }
     }
@@ -115,11 +115,11 @@ class ValidateRolloverIT : IndexStateManagementRestTestCase() {
             val data = getExplainValidationResult(index1)
             assertEquals(
                 "Index rollover validation status is PASSED.",
-                Validate.ValidationStatus.PASSED, data?.validationStatus
+                Validate.ValidationStatus.PASSED, data.validationStatus
             )
             assertEquals(
                 "Index rollover validation message is already rolled over",
-                ValidateRollover.getAlreadyRolledOverMessage(index1, aliasName), data?.validationMessage
+                ValidateRollover.getAlreadyRolledOverMessage(index1, aliasName), data.validationMessage
             )
         }
         assertTrue("New rollover index does not exist.", indexExists("$indexNameBase-000002"))
@@ -159,11 +159,11 @@ class ValidateRolloverIT : IndexStateManagementRestTestCase() {
             val data = getExplainValidationResult(index1)
             assertEquals(
                 "Index rollover validation status is RE_VALIDATING",
-                Validate.ValidationStatus.RE_VALIDATING, data?.validationStatus
+                Validate.ValidationStatus.RE_VALIDATING, data.validationStatus
             )
             assertEquals(
                 "Index rollover validation message is no alias index setting",
-                ValidateRollover.getFailedNoValidAliasMessage(index1), data?.validationMessage
+                ValidateRollover.getFailedNoValidAliasMessage(index1), data.validationMessage
             )
         }
     }
@@ -207,11 +207,11 @@ class ValidateRolloverIT : IndexStateManagementRestTestCase() {
             val data = getExplainValidationResult(index1)
             assertEquals(
                 "Index rollover validation status is RE_VALIDATING.",
-                Validate.ValidationStatus.RE_VALIDATING, data?.validationStatus
+                Validate.ValidationStatus.RE_VALIDATING, data.validationStatus
             )
             assertEquals(
                 "Index rollover validation message is not write index",
-                ValidateRollover.getFailedWriteIndexMessage(index1), data?.validationMessage
+                ValidateRollover.getFailedWriteIndexMessage(index1), data.validationMessage
             )
         }
     }
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/refreshanalyzer/RefreshSearchAnalyzerActionIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/refreshanalyzer/RefreshSearchAnalyzerActionIT.kt
index f3d8c243c..a16dbc48f 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/refreshanalyzer/RefreshSearchAnalyzerActionIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/refreshanalyzer/RefreshSearchAnalyzerActionIT.kt
@@ -5,6 +5,7 @@
 
 package org.opensearch.indexmanagement.refreshanalyzer
 
+import org.junit.After
 import org.junit.Assume
 import org.junit.Before
 import org.opensearch.client.Request
@@ -20,6 +21,11 @@ import java.nio.file.Files
 
 class RefreshSearchAnalyzerActionIT : IndexManagementRestTestCase() {
 
+    @After
+    fun clearIndicesAfterEachTest() {
+        wipeAllIndices()
+    }
+
     @Before
     fun checkIfLocalCluster() {
         Assume.assumeTrue(isLocalTest)
@@ -165,7 +171,6 @@ class RefreshSearchAnalyzerActionIT : IndexManagementRestTestCase() {
     }
 
     companion object {
-
         fun writeToFile(filePath: String, contents: String) {
             val path = org.opensearch.common.io.PathUtils.get(filePath)
             Files.newBufferedWriter(path, Charset.forName("UTF-8")).use { writer -> writer.write(contents) }
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/refreshanalyzer/RestRefreshSearchAnalyzerActionIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/refreshanalyzer/RestRefreshSearchAnalyzerActionIT.kt
index c12a3df5a..f58ff4d43 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/refreshanalyzer/RestRefreshSearchAnalyzerActionIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/refreshanalyzer/RestRefreshSearchAnalyzerActionIT.kt
@@ -5,6 +5,7 @@
 
 package org.opensearch.indexmanagement.refreshanalyzer
 
+import org.junit.AfterClass
 import org.opensearch.client.ResponseException
 import org.opensearch.common.settings.Settings
 import org.opensearch.indexmanagement.IndexManagementRestTestCase
@@ -15,6 +16,13 @@ import org.opensearch.rest.RestStatus
 
 class RestRefreshSearchAnalyzerActionIT : IndexManagementRestTestCase() {
 
+    companion object {
+        @AfterClass
+        @JvmStatic fun clearIndicesAfterClass() {
+            wipeAllIndices()
+        }
+    }
+
     fun `test missing indices`() {
         try {
             client().makeRequest(POST.toString(), REFRESH_SEARCH_ANALYZER_BASE_URI)
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupMetadataServiceTests.kt b/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupMetadataServiceTests.kt
index 265b69b01..66a940187 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupMetadataServiceTests.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupMetadataServiceTests.kt
@@ -150,7 +150,7 @@ class RollupMetadataServiceTests : OpenSearchTestCase() {
         val metadataService = RollupMetadataService(client, xContentRegistry)
 
         val expectedWindowStartTime = localDateAtTimezone("2020-03-08T01:00:00", ZoneId.of("America/Los_Angeles"))
-        // Should jump to March 3, 2020 at 3AM PST for end time due to DST
+        // Should jump to March 3, 2020, at 3AM PST for end time due to DST
         val expectedWindowEndTime = localDateAtTimezone("2020-03-08T03:00:00", ZoneId.of("America/Los_Angeles"))
 
         runBlocking {
@@ -255,7 +255,7 @@ class RollupMetadataServiceTests : OpenSearchTestCase() {
             dimensions = dimensions
         )
 
-        val firstDocTimestamp = "2020-03-22T08:40:15Z" // March 22, 2020 Sunday
+        val firstDocTimestamp = "2020-03-22T08:40:15Z" // March 22, 2020, Sunday
         val client = getClient(
             searchResponse = getSearchResponseForTimestamp(rollup, firstDocTimestamp),
             searchException = null,
@@ -664,7 +664,7 @@ class RollupMetadataServiceTests : OpenSearchTestCase() {
                 listener.onResponse(getResponse)
             }.whenever(this.mock).get(any(), any())
         }
-        val metadataService = RollupMetadataService(client, xContentRegistry)
+        RollupMetadataService(client, xContentRegistry)
 
 //        runBlocking {
 //            val getExistingMetadataResult = metadataService.getExistingMetadata(metadata.id)
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupRestTestCase.kt b/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupRestTestCase.kt
index 3bd41b433..150d935fb 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupRestTestCase.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/rollup/RollupRestTestCase.kt
@@ -11,6 +11,7 @@ import org.apache.http.entity.ContentType.APPLICATION_JSON
 import org.apache.http.entity.StringEntity
 import org.apache.http.message.BasicHeader
 import org.junit.AfterClass
+import org.junit.Before
 import org.opensearch.client.Response
 import org.opensearch.client.ResponseException
 import org.opensearch.client.RestClient
@@ -43,12 +44,19 @@ import java.time.Instant
 abstract class RollupRestTestCase : IndexManagementRestTestCase() {
 
     companion object {
-        @AfterClass @JvmStatic fun clearIndicesAfterClassCompletion() {
+        @AfterClass
+        @JvmStatic fun clearIndicesAfterClass() {
             wipeAllIndices()
         }
     }
 
-    override fun preserveIndicesUponCompletion(): Boolean = true
+    @Before
+    fun setDebugLogLevel() {
+        client().makeRequest(
+            "PUT", "_cluster/settings",
+            StringEntity("""{"transient":{"logger.org.opensearch.indexmanagement.rollup":"DEBUG"}}""", APPLICATION_JSON)
+        )
+    }
 
     protected fun createRollup(
         rollup: Rollup,
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/rollup/TestHelpers.kt b/src/test/kotlin/org/opensearch/indexmanagement/rollup/TestHelpers.kt
index 303336922..42bf72953 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/rollup/TestHelpers.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/rollup/TestHelpers.kt
@@ -108,7 +108,7 @@ fun randomRollup(): Rollup {
         sourceIndex = OpenSearchRestTestCase.randomAlphaOfLength(10).lowercase(Locale.ROOT),
         targetIndex = OpenSearchRestTestCase.randomAlphaOfLength(10).lowercase(Locale.ROOT),
         metadataID = if (OpenSearchRestTestCase.randomBoolean()) null else OpenSearchRestTestCase.randomAlphaOfLength(10),
-        roles = OpenSearchRestTestCase.randomList(10) { OpenSearchRestTestCase.randomAlphaOfLength(10) },
+        roles = emptyList(),
         pageSize = OpenSearchRestTestCase.randomIntBetween(1, 10000),
         delay = 0,
         continuous = OpenSearchRestTestCase.randomBoolean(),
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/rollup/model/ISMRollupTests.kt b/src/test/kotlin/org/opensearch/indexmanagement/rollup/model/ISMRollupTests.kt
index d0b35ecff..0a2c15ee5 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/rollup/model/ISMRollupTests.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/rollup/model/ISMRollupTests.kt
@@ -86,6 +86,7 @@ class ISMRollupTests : OpenSearchTestCase() {
         assertNotNull(rollup.jobEnabledTime)
         assertFalse(rollup.continuous)
         assertTrue(rollup.enabled)
+        @Suppress("DEPRECATION")
         assertTrue(rollup.roles.isEmpty())
         assertTrue(rollup.isEnabled)
     }
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/rollup/model/WriteableTests.kt b/src/test/kotlin/org/opensearch/indexmanagement/rollup/model/WriteableTests.kt
index 324b6a5ed..feb76c98f 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/rollup/model/WriteableTests.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/rollup/model/WriteableTests.kt
@@ -114,6 +114,18 @@ class WriteableTests : OpenSearchTestCase() {
         assertEquals("Round tripping Rollup stream doesn't work", rollup, streamedRollup)
     }
 
+    fun `test rollup roles field deprecation`() {
+        val rollup = randomRollup().copy(
+            delay = randomLongBetween(0, 60000000),
+            roles = listOf("I am deprecated")
+        )
+        val out = BytesStreamOutput().also { rollup.writeTo(it) }
+        val sin = StreamInput.wrap(out.bytes().toBytesRef().bytes)
+        val streamedRollup = Rollup(sin)
+        @Suppress("DEPRECATION")
+        assertTrue("roles field in rollup model is deprecated and should be parsed to empty list.", streamedRollup.roles.isEmpty())
+    }
+
     fun `test explain rollup as stream`() {
         val explainRollup = randomExplainRollup()
         val out = BytesStreamOutput().also { explainRollup.writeTo(it) }
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/rollup/runner/RollupRunnerIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/rollup/runner/RollupRunnerIT.kt
index 3dd8eee1b..72727fffe 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/rollup/runner/RollupRunnerIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/rollup/runner/RollupRunnerIT.kt
@@ -72,6 +72,7 @@ class RollupRunnerIT : RollupRestTestCase() {
         }
     }
 
+    @Suppress("UNCHECKED_CAST")
     fun `test rollup with avg metric`() {
         val sourceIdxTestName = "source_idx_test"
         val targetIdxTestName = "target_idx_test"
@@ -112,7 +113,7 @@ class RollupRunnerIT : RollupRestTestCase() {
             assertEquals("Rollup is not finished", RollupMetadata.Status.FINISHED, rollupMetadata.status)
 
             // Term query
-            var req = """
+            val req = """
             {
                 "size": 0,
                 "query": {
@@ -801,7 +802,8 @@ class RollupRunnerIT : RollupRestTestCase() {
         assertEquals("Did not have 2 rollups indexed", 2, rollupMetadata.stats.rollupsIndexed)
         // These are hard to test.. just assert they are more than 0
         assertTrue("Did not spend time indexing", rollupMetadata.stats.indexTimeInMillis > 0L)
-        assertTrue("Did not spend time searching", rollupMetadata.stats.searchTimeInMillis > 0L)
+        // In some cases it seems that these times are less than 1ms - which causes fails on ubuntu instances (at least that was detected)
+        assertTrue("Did not spend time searching", rollupMetadata.stats.searchTimeInMillis >= 0L)
     }
 
     fun `test rollup action with alias as target_index successfully`() {
@@ -865,6 +867,10 @@ class RollupRunnerIT : RollupRestTestCase() {
         var rollupMetadata = getRollupMetadata(rollupMetadataID)
         assertTrue("Did not process any doc during rollup", rollupMetadata.stats.documentsProcessed > 0)
 
+        // TODO Flaky: version conflict could happen here
+        //  From log diving, it seems to be a race condition coming from RollupRunner
+        //  (need more dive to understand rollup business logic)
+        //  There are indexRollup happened between get and enable
         // restart job
         client().makeRequest(
             "PUT",
@@ -877,8 +883,8 @@ class RollupRunnerIT : RollupRestTestCase() {
         startedRollup = waitFor {
             val rollupJob = getRollup(rollupId = rollup.id)
             assertNotNull("Rollup job doesn't have metadata set", rollupJob.metadataID)
-            val rollupMetadata = getRollupMetadata(rollupJob.metadataID!!)
-            assertEquals("Rollup is not finished", RollupMetadata.Status.FINISHED, rollupMetadata.status)
+            val rollupMetadata1 = getRollupMetadata(rollupJob.metadataID!!)
+            assertEquals("Rollup is not finished", RollupMetadata.Status.FINISHED, rollupMetadata1.status)
             rollupJob
         }
 
@@ -968,8 +974,8 @@ class RollupRunnerIT : RollupRestTestCase() {
         startedRollup = waitFor {
             val rollupJob = getRollup(rollupId = rollup.id)
             assertNotNull("Rollup job doesn't have metadata set", rollupJob.metadataID)
-            val rollupMetadata = getRollupMetadata(rollupJob.metadataID!!)
-            assertEquals("Rollup is not finished", RollupMetadata.Status.FINISHED, rollupMetadata.status)
+            val rollupMetadata1 = getRollupMetadata(rollupJob.metadataID!!)
+            assertEquals("Rollup is not finished", RollupMetadata.Status.FINISHED, rollupMetadata1.status)
             rollupJob
         }
 
@@ -1056,8 +1062,8 @@ class RollupRunnerIT : RollupRestTestCase() {
         var startedRollup2 = waitFor {
             val rollupJob = getRollup(rollupId = job2.id)
             assertNotNull("Rollup job doesn't have metadata set", rollupJob.metadataID)
-            val rollupMetadata = getRollupMetadata(rollupJob.metadataID!!)
-            assertEquals("Rollup is not finished", RollupMetadata.Status.FINISHED, rollupMetadata.status)
+            val rollupMetadata1 = getRollupMetadata(rollupJob.metadataID!!)
+            assertEquals("Rollup is not finished", RollupMetadata.Status.FINISHED, rollupMetadata1.status)
             assertTrue("Rollup is not disabled", !rollupJob.enabled)
             rollupJob
         }
@@ -1084,8 +1090,8 @@ class RollupRunnerIT : RollupRestTestCase() {
         startedRollup1 = waitFor {
             val rollupJob = getRollup(rollupId = job1.id)
             assertNotNull("Rollup job doesn't have metadata set", rollupJob.metadataID)
-            val rollupMetadata = getRollupMetadata(rollupJob.metadataID!!)
-            assertEquals("Rollup is not finished", RollupMetadata.Status.FAILED, rollupMetadata.status)
+            val rollupMetadata1 = getRollupMetadata(rollupJob.metadataID!!)
+            assertEquals("Rollup is not finished", RollupMetadata.Status.FAILED, rollupMetadata1.status)
             rollupJob
         }
 
@@ -1167,8 +1173,8 @@ class RollupRunnerIT : RollupRestTestCase() {
         val startedRollup2 = waitFor {
             val rollupJob = getRollup(rollupId = job2.id)
             assertNotNull("Rollup job doesn't have metadata set", rollupJob.metadataID)
-            val rollupMetadata = getRollupMetadata(rollupJob.metadataID!!)
-            assertEquals("Rollup is not finished", RollupMetadata.Status.FAILED, rollupMetadata.status)
+            val rollupMetadata1 = getRollupMetadata(rollupJob.metadataID!!)
+            assertEquals("Rollup is not finished", RollupMetadata.Status.FAILED, rollupMetadata1.status)
             assertTrue("Rollup is not disabled", !rollupJob.enabled)
             rollupJob
         }
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/snapshotmanagement/SnapshotManagementRestTestCase.kt b/src/test/kotlin/org/opensearch/indexmanagement/snapshotmanagement/SnapshotManagementRestTestCase.kt
index c460c2439..8b694b1d0 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/snapshotmanagement/SnapshotManagementRestTestCase.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/snapshotmanagement/SnapshotManagementRestTestCase.kt
@@ -10,6 +10,7 @@ import org.apache.http.HttpHeaders
 import org.apache.http.entity.ContentType.APPLICATION_JSON
 import org.apache.http.entity.StringEntity
 import org.apache.http.message.BasicHeader
+import org.junit.After
 import org.junit.Before
 import org.opensearch.client.Response
 import org.opensearch.client.ResponseException
@@ -36,6 +37,11 @@ import java.time.Instant.now
 
 abstract class SnapshotManagementRestTestCase : IndexManagementRestTestCase() {
 
+    @After
+    fun clearIndicesAfterEachTest() {
+        wipeAllIndices()
+    }
+
     var timeout: Instant = Instant.ofEpochSecond(20)
 
     /**
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/snapshotmanagement/resthandler/RestIndexSnapshotManagementIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/snapshotmanagement/resthandler/RestIndexSnapshotManagementIT.kt
index c622584be..5c1b213d2 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/snapshotmanagement/resthandler/RestIndexSnapshotManagementIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/snapshotmanagement/resthandler/RestIndexSnapshotManagementIT.kt
@@ -44,6 +44,7 @@ class RestIndexSnapshotManagementIT : SnapshotManagementRestTestCase() {
         assertEquals("Created and returned snapshot management policies differ", smPolicy.toMap(XCONTENT_WITHOUT_TYPE_AND_USER), responseSMPolicy)
     }
 
+    @Suppress("UNCHECKED_CAST")
     fun `test updating a snapshot management policy with correct seq_no and primary_term`() {
         val smPolicy = createSMPolicy(randomSMPolicy())
         val updateResponse = client().makeRequest(
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/transform/TestHelpers.kt b/src/test/kotlin/org/opensearch/indexmanagement/transform/TestHelpers.kt
index baa8b982e..bc07e0f0d 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/transform/TestHelpers.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/transform/TestHelpers.kt
@@ -86,7 +86,7 @@ fun randomTransform(): Transform {
         description = OpenSearchRestTestCase.randomAlphaOfLength(10),
         sourceIndex = OpenSearchRestTestCase.randomAlphaOfLength(10).lowercase(Locale.ROOT),
         targetIndex = OpenSearchRestTestCase.randomAlphaOfLength(10).lowercase(Locale.ROOT),
-        roles = OpenSearchRestTestCase.randomList(10) { OpenSearchRestTestCase.randomAlphaOfLength(10) },
+        roles = emptyList(),
         pageSize = if (isContinuous) OpenSearchRestTestCase.randomIntBetween(1, 1000) else OpenSearchRestTestCase.randomIntBetween(1, 10000),
         groups = randomGroups(),
         aggregations = randomAggregationFactories(),
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/transform/TransformRestTestCase.kt b/src/test/kotlin/org/opensearch/indexmanagement/transform/TransformRestTestCase.kt
index 286a3cd19..7e26fa263 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/transform/TransformRestTestCase.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/transform/TransformRestTestCase.kt
@@ -40,13 +40,12 @@ import java.time.Instant
 abstract class TransformRestTestCase : IndexManagementRestTestCase() {
 
     companion object {
-        @AfterClass @JvmStatic fun clearIndicesAfterClassCompletion() {
+        @AfterClass
+        @JvmStatic fun clearIndicesAfterClass() {
             wipeAllIndices()
         }
     }
 
-    override fun preserveIndicesUponCompletion(): Boolean = true
-
     protected fun createTransform(
         transform: Transform,
         transformId: String = randomAlphaOfLength(10),
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/transform/TransformRunnerIT.kt b/src/test/kotlin/org/opensearch/indexmanagement/transform/TransformRunnerIT.kt
index 6b7dbfa00..73cca0ef1 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/transform/TransformRunnerIT.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/transform/TransformRunnerIT.kt
@@ -68,8 +68,9 @@ class TransformRunnerIT : TransformRestTestCase() {
         assertEquals("More than expected pages processed", 3L, metadata.stats.pagesProcessed)
         assertEquals("More than expected documents indexed", 2L, metadata.stats.documentsIndexed)
         assertEquals("More than expected documents processed", 5000L, metadata.stats.documentsProcessed)
-        assertTrue("Doesn't capture indexed time", metadata.stats.indexTimeInMillis > 0)
-        assertTrue("Didn't capture search time", metadata.stats.searchTimeInMillis > 0)
+        // In some cases it seems that these times are less than 1ms - which causes fails on ubuntu instances (at least that was detected)
+        assertTrue("Doesn't capture indexed time", metadata.stats.indexTimeInMillis >= 0)
+        assertTrue("Didn't capture search time", metadata.stats.searchTimeInMillis >= 0)
     }
 
     fun `test transform with data filter`() {
@@ -107,9 +108,9 @@ class TransformRunnerIT : TransformRestTestCase() {
         assertEquals("More than expected pages processed", 2L, metadata.stats.pagesProcessed)
         assertEquals("More than expected documents indexed", 1L, metadata.stats.documentsIndexed)
         assertEquals("More than expected documents processed", 4977L, metadata.stats.documentsProcessed)
-        assertTrue("Doesn't capture indexed time", metadata.stats.indexTimeInMillis > 0)
-        // In some cases it seems that the search time is less than 1ms - which causes fails on ubuntu instances (at least that was detected)
-        // assertTrue("Didn't capture search time", metadata.stats.searchTimeInMillis > 0)
+        // In some cases it seems that these times are less than 1ms - which causes fails on ubuntu instances (at least that was detected)
+        assertTrue("Doesn't capture indexed time", metadata.stats.indexTimeInMillis >= 0)
+        assertTrue("Didn't capture search time", metadata.stats.searchTimeInMillis >= 0)
     }
 
     fun `test invalid transform`() {
@@ -206,6 +207,7 @@ class TransformRunnerIT : TransformRestTestCase() {
         assertTrue("Didn't capture search time", metadata.stats.searchTimeInMillis > 0)
     }
 
+    @Suppress("UNCHECKED_CAST")
     fun `test transform target index _doc_count against the source index _doc_count`() {
         val sourceIdxTestName = "source_idx_test"
         val targetIdxTestName = "target_idx_test"
@@ -247,7 +249,7 @@ class TransformRunnerIT : TransformRestTestCase() {
             val transformMetadata = getTransformMetadata(transformJob.metadataId!!)
             assertEquals("Transform is not finished", TransformMetadata.Status.FINISHED, transformMetadata.status)
 
-            var req = """
+            val req = """
             {
                 "size": 0,
                 "aggs": {
@@ -451,8 +453,9 @@ class TransformRunnerIT : TransformRestTestCase() {
         assertEquals("More than expected pages processed", 2L, metadata.stats.pagesProcessed)
         assertEquals("More than expected documents indexed", 2L, metadata.stats.documentsIndexed)
         assertEquals("More than expected documents processed", 10000L, metadata.stats.documentsProcessed)
-        assertTrue("Doesn't capture indexed time", metadata.stats.indexTimeInMillis > 0)
-        assertTrue("Didn't capture search time", metadata.stats.searchTimeInMillis > 0)
+        // In some cases it seems that these times are less than 1ms - which causes fails on ubuntu instances (at least that was detected)
+        assertTrue("Doesn't capture indexed time", metadata.stats.indexTimeInMillis >= 0)
+        assertTrue("Didn't capture search time", metadata.stats.searchTimeInMillis >= 0)
     }
 
     fun `test no-op execution when no buckets have been modified`() {
@@ -912,7 +915,7 @@ class TransformRunnerIT : TransformRestTestCase() {
         assertTrue("Doesn't capture indexed time", firstIterationMetadata.stats.indexTimeInMillis > 0)
         assertTrue("Didn't capture search time", firstIterationMetadata.stats.searchTimeInMillis > 0)
 
-        // Get all of the buckets
+        // Get all the buckets
         var hits = waitFor {
             val response = client().makeRequest(
                 "GET", "${transform.targetIndex}/_search",
diff --git a/src/test/kotlin/org/opensearch/indexmanagement/transform/model/WriteableTests.kt b/src/test/kotlin/org/opensearch/indexmanagement/transform/model/WriteableTests.kt
index 1cd5a59ef..5072bd126 100644
--- a/src/test/kotlin/org/opensearch/indexmanagement/transform/model/WriteableTests.kt
+++ b/src/test/kotlin/org/opensearch/indexmanagement/transform/model/WriteableTests.kt
@@ -28,4 +28,12 @@ class WriteableTests : OpenSearchTestCase() {
         val streamedTransform = Transform(buildStreamInputForTransforms(out))
         assertEquals("Round tripping Transform stream doesn't work", transform, streamedTransform)
     }
+
+    fun `test transform roles field deprecation`() {
+        val transform = randomTransform().copy(roles = listOf("I am deprecated"))
+        val out = BytesStreamOutput().also { transform.writeTo(it) }
+        val streamedTransform = Transform(buildStreamInputForTransforms(out))
+        @Suppress("DEPRECATION")
+        assertTrue("roles field in transform model is deprecated and should be parsed to empty list.", streamedTransform.roles.isEmpty())
+    }
 }