changing thread pool

Signed-off-by: Himshikha Gupta <himshikh@amazon.com>

Author: Himshikha Gupta

server/src/main/java/org/opensearch/gateway/remote/ClusterStateChecksum.java

@@ -43,6 +43,7 @@
  */
 public class ClusterStateChecksum implements ToXContentFragment, Writeable {
 
+    public static final int COMPONENT_SIZE = 11;
     static final String ROUTING_TABLE_CS = "routing_table";
     static final String NODES_CS = "discovery_nodes";
     static final String BLOCKS_CS = "blocks";
@@ -56,7 +57,6 @@ public class ClusterStateChecksum implements ToXContentFragment, Writeable {
     static final String INDICES_CS = "indices_md";
     private static final String CLUSTER_STATE_CS = "cluster_state";
     private static final int CHECKSUM_SIZE = 8;
-    private static final int COMPONENT_SIZE = 11;
     private static final Logger logger = LogManager.getLogger(ClusterStateChecksum.class);
 
     long routingTableChecksum;

server/src/main/java/org/opensearch/threadpool/ThreadPool.java

@@ -53,6 +53,7 @@
 import org.opensearch.core.service.ReportingService;
 import org.opensearch.core.xcontent.ToXContentFragment;
 import org.opensearch.core.xcontent.XContentBuilder;
+import org.opensearch.gateway.remote.ClusterStateChecksum;
 import org.opensearch.node.Node;
 
 import java.io.IOException;
@@ -192,7 +193,7 @@ public static ThreadPoolType fromType(String type) {
         map.put(Names.REMOTE_RECOVERY, ThreadPoolType.SCALING);
         map.put(Names.REMOTE_STATE_READ, ThreadPoolType.SCALING);
         map.put(Names.INDEX_SEARCHER, ThreadPoolType.RESIZABLE);
-        map.put(Names.REMOTE_STATE_CHECKSUM, ThreadPoolType.SCALING);
+        map.put(Names.REMOTE_STATE_CHECKSUM, ThreadPoolType.FIXED);
         THREAD_POOL_TYPES = Collections.unmodifiableMap(map);
     }
 
@@ -311,12 +312,7 @@ public ThreadPool(
         );
         builders.put(
             Names.REMOTE_STATE_CHECKSUM,
-            new ScalingExecutorBuilder(
-                Names.REMOTE_STATE_CHECKSUM,
-                1,
-                twiceAllocatedProcessors(allocatedProcessors),
-                TimeValue.timeValueMinutes(5)
-            )
+            new FixedExecutorBuilder(settings, Names.REMOTE_STATE_CHECKSUM, ClusterStateChecksum.COMPONENT_SIZE, 1000)
         );
 
         for (final ExecutorBuilder<?> builder : customBuilders) {

server/src/test/java/org/opensearch/threadpool/ScalingThreadPoolTests.java

@@ -157,7 +157,6 @@ private int expectedSize(final String threadPoolName, final int numberOfProcesso
         sizes.put(ThreadPool.Names.REMOTE_REFRESH_RETRY, ThreadPool::halfAllocatedProcessors);
         sizes.put(ThreadPool.Names.REMOTE_RECOVERY, ThreadPool::twiceAllocatedProcessors);
         sizes.put(ThreadPool.Names.REMOTE_STATE_READ, ThreadPool::twiceAllocatedProcessors);
-        sizes.put(ThreadPool.Names.REMOTE_STATE_CHECKSUM, ThreadPool::twiceAllocatedProcessors);
         return sizes.get(threadPoolName).apply(numberOfProcessors);
     }