diff --git a/docs/user/admin/settings.rst b/docs/user/admin/settings.rst
index dfce554e2b..686116636a 100644
--- a/docs/user/admin/settings.rst
+++ b/docs/user/admin/settings.rst
@@ -317,9 +317,9 @@ plugins.query.executionengine.spark.session.enabled
 Description
 -----------
 
-By default, execution engine is executed in session mode. You can disable session mode by this setting.
+By default, execution engine is executed in job mode. You can enable session mode by this setting.
 
-1. The default value is true.
+1. The default value is false.
 2. This setting is node scope.
 3. This setting can be updated dynamically.
 
@@ -328,7 +328,7 @@ You can update the setting with a new value like this.
 SQL query::
 
     sh$ curl -sS -H 'Content-Type: application/json' -X PUT localhost:9200/_plugins/_query/settings \
-    ... -d '{"transient":{"plugins.query.executionengine.spark.session.enabled":"false"}}'
+    ... -d '{"transient":{"plugins.query.executionengine.spark.session.enabled":"true"}}'
     {
       "acknowledged": true,
       "persistent": {},
@@ -338,7 +338,7 @@ SQL query::
             "executionengine": {
               "spark": {
                 "session": {
-                  "enabled": "false"
+                  "enabled": "true"
                 }
               }
             }
diff --git a/opensearch/src/main/java/org/opensearch/sql/opensearch/setting/OpenSearchSettings.java b/opensearch/src/main/java/org/opensearch/sql/opensearch/setting/OpenSearchSettings.java
index 6554ef7f61..f80b576fe0 100644
--- a/opensearch/src/main/java/org/opensearch/sql/opensearch/setting/OpenSearchSettings.java
+++ b/opensearch/src/main/java/org/opensearch/sql/opensearch/setting/OpenSearchSettings.java
@@ -138,7 +138,7 @@ public class OpenSearchSettings extends Settings {
   public static final Setting<?> SPARK_EXECUTION_SESSION_ENABLED_SETTING =
       Setting.boolSetting(
           Key.SPARK_EXECUTION_SESSION_ENABLED.getKeyValue(),
-          true,
+          false,
           Setting.Property.NodeScope,
           Setting.Property.Dynamic);
 
diff --git a/spark/src/main/java/org/opensearch/sql/spark/execution/statestore/StateStore.java b/spark/src/main/java/org/opensearch/sql/spark/execution/statestore/StateStore.java
index f471d79c22..e6bad9fc26 100644
--- a/spark/src/main/java/org/opensearch/sql/spark/execution/statestore/StateStore.java
+++ b/spark/src/main/java/org/opensearch/sql/spark/execution/statestore/StateStore.java
@@ -60,9 +60,7 @@ public class StateStore {
   public static String SETTINGS_FILE_NAME = "query_execution_request_settings.yml";
   public static String MAPPING_FILE_NAME = "query_execution_request_mapping.yml";
   public static Function<String, String> DATASOURCE_TO_REQUEST_INDEX =
-      datasourceName ->
-          String.format(
-              "%s_%s", SPARK_REQUEST_BUFFER_INDEX_NAME, datasourceName.toLowerCase(Locale.ROOT));
+      datasourceName -> String.format("%s_%s", SPARK_REQUEST_BUFFER_INDEX_NAME, datasourceName);
 
   private static final Logger LOG = LogManager.getLogger();
 
diff --git a/spark/src/test/java/org/opensearch/sql/spark/asyncquery/AsyncQueryExecutorServiceImplSpecTest.java b/spark/src/test/java/org/opensearch/sql/spark/asyncquery/AsyncQueryExecutorServiceImplSpecTest.java
index 4bc894c1b2..cf638effc6 100644
--- a/spark/src/test/java/org/opensearch/sql/spark/asyncquery/AsyncQueryExecutorServiceImplSpecTest.java
+++ b/spark/src/test/java/org/opensearch/sql/spark/asyncquery/AsyncQueryExecutorServiceImplSpecTest.java
@@ -37,7 +37,6 @@
 import lombok.Getter;
 import org.junit.After;
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.opensearch.action.search.SearchRequest;
 import org.opensearch.action.search.SearchResponse;
@@ -213,6 +212,9 @@ public void withSessionCreateAsyncQueryThenGetResultThenCancel() {
     AsyncQueryExecutorService asyncQueryExecutorService =
         createAsyncQueryExecutorService(emrsClient);
 
+    // enable session
+    enableSession(true);
+
     // 1. create async query.
     CreateAsyncQueryResponse response =
         asyncQueryExecutorService.createAsyncQuery(
@@ -313,9 +315,6 @@ public void interactiveQueryNoTimeout() {
     assertEquals(0L, (long) emrsClient.getJobRequest().executionTimeout());
   }
 
-  @Ignore(
-      "flaky test, java.lang.IllegalArgumentException: Right now only AES/GCM/NoPadding is"
-          + " supported")
   @Test
   public void datasourceWithBasicAuth() {
     Map<String, String> properties = new HashMap<>();
@@ -481,42 +480,6 @@ public void submitQueryInInvalidSessionWillCreateNewSession() {
     assertNotEquals(invalidSessionId.getSessionId(), asyncQuery.getSessionId());
   }
 
-  @Test
-  public void datasourceNameIncludeUppercase() {
-    dataSourceService.createDataSource(
-        new DataSourceMetadata(
-            "TESTS3",
-            DataSourceType.S3GLUE,
-            ImmutableList.of(),
-            ImmutableMap.of(
-                "glue.auth.type",
-                "iam_role",
-                "glue.auth.role_arn",
-                "arn:aws:iam::924196221507:role/FlintOpensearchServiceRole",
-                "glue.indexstore.opensearch.uri",
-                "http://localhost:9200",
-                "glue.indexstore.opensearch.auth",
-                "noauth"),
-            null));
-
-    LocalEMRSClient emrsClient = new LocalEMRSClient();
-    AsyncQueryExecutorService asyncQueryExecutorService =
-        createAsyncQueryExecutorService(emrsClient);
-
-    // enable session
-    enableSession(true);
-
-    CreateAsyncQueryResponse response =
-        asyncQueryExecutorService.createAsyncQuery(
-            new CreateAsyncQueryRequest("select 1", "TESTS3", LangType.SQL, null));
-    String params = emrsClient.getJobRequest().getSparkSubmitParams();
-
-    assertNotNull(response.getSessionId());
-    assertTrue(
-        params.contains(
-            "--conf spark.sql.catalog.TESTS3=org.opensearch.sql.FlintDelegatingSessionCatalog"));
-  }
-
   private DataSourceServiceImpl createDataSourceService() {
     String masterKey = "a57d991d9b573f75b9bba1df";
     DataSourceMetadataStorage dataSourceMetadataStorage =