diff --git a/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/scheduler/AsyncQuerySchedulerBuilder.java b/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/scheduler/AsyncQuerySchedulerBuilder.java
index 6249784ee..330b38f02 100644
--- a/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/scheduler/AsyncQuerySchedulerBuilder.java
+++ b/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/scheduler/AsyncQuerySchedulerBuilder.java
@@ -12,6 +12,7 @@
 import org.opensearch.flint.common.scheduler.AsyncQueryScheduler;
 import org.opensearch.flint.core.FlintOptions;
 
+import java.io.IOException;
 import java.lang.reflect.Constructor;
 
 /**
@@ -30,7 +31,7 @@ public enum AsyncQuerySchedulerAction {
     REMOVE
   }
 
-  public static AsyncQueryScheduler build(SparkSession sparkSession, FlintOptions options) {
+  public static AsyncQueryScheduler build(SparkSession sparkSession, FlintOptions options) throws IOException {
     return new AsyncQuerySchedulerBuilder().doBuild(sparkSession, options);
   }
 
@@ -41,7 +42,7 @@ public static AsyncQueryScheduler build(SparkSession sparkSession, FlintOptions
    * @param options The FlintOptions containing configuration details.
    * @return An instance of AsyncQueryScheduler.
    */
-  protected AsyncQueryScheduler doBuild(SparkSession sparkSession, FlintOptions options) {
+  protected AsyncQueryScheduler doBuild(SparkSession sparkSession, FlintOptions options) throws IOException {
     String className = options.getCustomAsyncQuerySchedulerClass();
 
     if (className.isEmpty()) {
@@ -68,7 +69,7 @@ protected OpenSearchAsyncQueryScheduler createOpenSearchAsyncQueryScheduler(Flin
     return new OpenSearchAsyncQueryScheduler(options);
   }
 
-  protected boolean hasAccessToSchedulerIndex(OpenSearchAsyncQueryScheduler scheduler) {
+  protected boolean hasAccessToSchedulerIndex(OpenSearchAsyncQueryScheduler scheduler) throws IOException {
     return scheduler.hasAccessToSchedulerIndex();
   }
 
diff --git a/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/scheduler/OpenSearchAsyncQueryScheduler.java b/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/scheduler/OpenSearchAsyncQueryScheduler.java
index d8c423657..a1ef45825 100644
--- a/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/scheduler/OpenSearchAsyncQueryScheduler.java
+++ b/flint-spark-integration/src/main/scala/org/opensearch/flint/spark/scheduler/OpenSearchAsyncQueryScheduler.java
@@ -38,6 +38,7 @@
 import org.opensearch.jobscheduler.spi.schedule.Schedule;
 import org.opensearch.rest.RestStatus;
 
+import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 import java.time.Instant;
@@ -140,14 +141,16 @@ void createAsyncQuerySchedulerIndex(IRestHighLevelClient client) {
      * @see #createClient()
      * @see #ensureIndexExists(IRestHighLevelClient)
      */
-    public boolean hasAccessToSchedulerIndex() {
+    public boolean hasAccessToSchedulerIndex() throws IOException {
+        IRestHighLevelClient client = createClient();
         try {
-            IRestHighLevelClient client = createClient();
             ensureIndexExists(client);
             return true;
         } catch (Throwable e) {
             LOG.error("Failed to ensure index exists", e);
             return false;
+        } finally {
+            client.close();
         }
     }
     private void ensureIndexExists(IRestHighLevelClient client) {
diff --git a/flint-spark-integration/src/test/java/org/opensearch/flint/core/scheduler/AsyncQuerySchedulerBuilderTest.java b/flint-spark-integration/src/test/java/org/opensearch/flint/core/scheduler/AsyncQuerySchedulerBuilderTest.java
index ea7b37f6a..3c65a96a5 100644
--- a/flint-spark-integration/src/test/java/org/opensearch/flint/core/scheduler/AsyncQuerySchedulerBuilderTest.java
+++ b/flint-spark-integration/src/test/java/org/opensearch/flint/core/scheduler/AsyncQuerySchedulerBuilderTest.java
@@ -5,7 +5,6 @@
 
 package org.opensearch.flint.core.scheduler;
 
-import org.apache.spark.FlintSuite;
 import org.apache.spark.sql.SparkSession;
 import org.apache.spark.sql.SQLContext;
 import org.junit.Before;
@@ -18,6 +17,8 @@
 import org.opensearch.flint.spark.scheduler.AsyncQuerySchedulerBuilder;
 import org.opensearch.flint.spark.scheduler.OpenSearchAsyncQueryScheduler;
 
+import java.io.IOException;
+
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.Mockito.mock;
@@ -41,7 +42,7 @@ public void setUp() {
     }
 
     @Test
-    public void testBuildWithEmptyClassNameAndAccessibleIndex() {
+    public void testBuildWithEmptyClassNameAndAccessibleIndex() throws IOException {
         FlintOptions options = mock(FlintOptions.class);
         when(options.getCustomAsyncQuerySchedulerClass()).thenReturn("");
         OpenSearchAsyncQueryScheduler mockScheduler = mock(OpenSearchAsyncQueryScheduler.class);
@@ -52,7 +53,7 @@ public void testBuildWithEmptyClassNameAndAccessibleIndex() {
     }
 
     @Test
-    public void testBuildWithEmptyClassNameAndInaccessibleIndex() {
+    public void testBuildWithEmptyClassNameAndInaccessibleIndex() throws IOException {
         FlintOptions options = mock(FlintOptions.class);
         when(options.getCustomAsyncQuerySchedulerClass()).thenReturn("");
         OpenSearchAsyncQueryScheduler mockScheduler = mock(OpenSearchAsyncQueryScheduler.class);
@@ -63,7 +64,7 @@ public void testBuildWithEmptyClassNameAndInaccessibleIndex() {
     }
 
     @Test
-    public void testBuildWithCustomClassName() {
+    public void testBuildWithCustomClassName() throws IOException {
         FlintOptions options = mock(FlintOptions.class);
         when(options.getCustomAsyncQuerySchedulerClass())
                 .thenReturn("org.opensearch.flint.core.scheduler.AsyncQuerySchedulerBuilderTest$AsyncQuerySchedulerForLocalTest");
@@ -73,7 +74,7 @@ public void testBuildWithCustomClassName() {
     }
 
     @Test(expected = RuntimeException.class)
-    public void testBuildWithInvalidClassName() {
+    public void testBuildWithInvalidClassName() throws IOException {
         FlintOptions options = mock(FlintOptions.class);
         when(options.getCustomAsyncQuerySchedulerClass()).thenReturn("invalid.ClassName");
 
@@ -124,11 +125,11 @@ protected OpenSearchAsyncQueryScheduler createOpenSearchAsyncQueryScheduler(Flin
         }
 
         @Override
-        protected boolean hasAccessToSchedulerIndex(OpenSearchAsyncQueryScheduler scheduler) {
+        protected boolean hasAccessToSchedulerIndex(OpenSearchAsyncQueryScheduler scheduler) throws IOException {
             return mockHasAccess != null ? mockHasAccess : super.hasAccessToSchedulerIndex(scheduler);
         }
 
-        public static AsyncQueryScheduler build(OpenSearchAsyncQueryScheduler asyncQueryScheduler, Boolean hasAccess, SparkSession sparkSession, FlintOptions options) {
+        public static AsyncQueryScheduler build(OpenSearchAsyncQueryScheduler asyncQueryScheduler, Boolean hasAccess, SparkSession sparkSession, FlintOptions options) throws IOException {
             return new AsyncQuerySchedulerBuilderForLocalTest(asyncQueryScheduler, hasAccess).doBuild(sparkSession, options);
         }
     }