Revert "SegRep with Remote: Add hook for publishing checkpoint notifi…

CHANGELOG.md

@@ -23,7 +23,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Support to clear filecache using clear indices cache API ([#7498](https://github.com/opensearch-project/OpenSearch/pull/7498))
 - Create NamedRoute to map extension routes to a shortened name ([#6870](https://github.com/opensearch-project/OpenSearch/pull/6870))
 - Added @dbwiddis as on OpenSearch maintainer ([#7665](https://github.com/opensearch-project/OpenSearch/pull/7665))
-- SegRep with Remote: Add hook for publishing checkpoint notifications after segment upload to remote store ([#7394](https://github.com/opensearch-project/OpenSearch/pull/7394))
 - [Extensions] Add ExtensionAwarePlugin extension point to add custom settings for extensions ([#7526](https://github.com/opensearch-project/OpenSearch/pull/7526))
 - Add new cluster setting to set default index replication type ([#7420](https://github.com/opensearch-project/OpenSearch/pull/7420))
 

server/src/main/java/org/opensearch/index/IndexSettings.java

@@ -1030,14 +1030,6 @@ public boolean isSegRepEnabled() {
         return ReplicationType.SEGMENT.equals(replicationType);
     }
 
-    public boolean isSegRepLocalEnabled() {
-        return isSegRepEnabled() && !isSegRepWithRemoteEnabled();
-    }
-
-    public boolean isSegRepWithRemoteEnabled() {
-        return isSegRepEnabled() && isRemoteStoreEnabled() && FeatureFlags.isEnabled(FeatureFlags.SEGMENT_REPLICATION_EXPERIMENTAL);
-    }
-
     /**
      * Returns if remote store is enabled for this index.
      */

server/src/main/java/org/opensearch/index/shard/CheckpointRefreshListener.java

@@ -40,10 +40,7 @@ public void beforeRefresh() throws IOException {
 
     @Override
     public void afterRefresh(boolean didRefresh) throws IOException {
-        if (didRefresh
-            && shard.state() == IndexShardState.STARTED
-            && shard.getReplicationTracker().isPrimaryMode()
-            && !shard.indexSettings.isSegRepWithRemoteEnabled()) {
+        if (didRefresh && shard.state() == IndexShardState.STARTED && shard.getReplicationTracker().isPrimaryMode()) {
             publisher.publish(shard, shard.getLatestReplicationCheckpoint());
         }
     }

server/src/main/java/org/opensearch/index/shard/IndexShard.java

@@ -3552,16 +3552,10 @@ private EngineConfig newEngineConfig(LongSupplier globalCheckpointSupplier) thro
         internalRefreshListener.add(new RefreshMetricUpdater(refreshMetric));
         if (isRemoteStoreEnabled()) {
             internalRefreshListener.add(
-                new RemoteStoreRefreshListener(
-                    this,
-                    // Add the checkpoint publisher if the Segment Replciation via remote store is enabled.
-                    indexSettings.isSegRepWithRemoteEnabled() ? this.checkpointPublisher : SegmentReplicationCheckpointPublisher.EMPTY,
-                    remoteRefreshSegmentPressureService.getRemoteRefreshSegmentTracker(shardId())
-                )
+                new RemoteStoreRefreshListener(this, remoteRefreshSegmentPressureService.getRemoteRefreshSegmentTracker(shardId()))
             );
         }
-
-        if (this.checkpointPublisher != null && shardRouting.primary() && indexSettings.isSegRepLocalEnabled()) {
+        if (this.checkpointPublisher != null && indexSettings.isSegRepEnabled() && shardRouting.primary()) {
             internalRefreshListener.add(new CheckpointRefreshListener(this, this.checkpointPublisher));
         }
         /**

server/src/main/java/org/opensearch/index/shard/RemoteStoreRefreshListener.java

@@ -31,7 +31,6 @@
 import org.opensearch.index.seqno.SequenceNumbers;
 import org.opensearch.index.store.RemoteSegmentStoreDirectory;
 import org.opensearch.indices.replication.checkpoint.ReplicationCheckpoint;
-import org.opensearch.indices.replication.checkpoint.SegmentReplicationCheckpointPublisher;
 import org.opensearch.threadpool.Scheduler;
 import org.opensearch.threadpool.ThreadPool;
 
@@ -108,15 +107,9 @@ public final class RemoteStoreRefreshListener implements ReferenceManager.Refres
      */
     private final Map<String, Long> latestFileNameSizeOnLocalMap = ConcurrentCollections.newConcurrentMap();
 
-    private final SegmentReplicationCheckpointPublisher checkpointPublisher;
-
     private final FileUploader fileUploader;
 
-    public RemoteStoreRefreshListener(
-        IndexShard indexShard,
-        SegmentReplicationCheckpointPublisher checkpointPublisher,
-        RemoteRefreshSegmentTracker segmentTracker
-    ) {
+    public RemoteStoreRefreshListener(IndexShard indexShard, RemoteRefreshSegmentTracker segmentTracker) {
         this.indexShard = indexShard;
         this.storeDirectory = indexShard.store().directory();
         this.remoteDirectory = (RemoteSegmentStoreDirectory) ((FilterDirectory) ((FilterDirectory) indexShard.remoteStore().directory())
@@ -132,7 +125,6 @@ public RemoteStoreRefreshListener(
         }
         this.segmentTracker = segmentTracker;
         resetBackOffDelayIterator();
-        this.checkpointPublisher = checkpointPublisher;
         this.fileUploader = new FileUploader(new UploadTracker() {
             @Override
             public void beforeUpload(String file) {
@@ -245,7 +237,6 @@ private synchronized void syncSegments(boolean isRetry) {
                             clearStaleFilesFromLocalSegmentChecksumMap(localSegmentsPostRefresh);
                             onSuccessfulSegmentsSync(refreshTimeMs, refreshSeqNo);
                             ((InternalEngine) indexShard.getEngine()).translogManager().setMinSeqNoToKeep(lastRefreshedCheckpoint + 1);
-                            checkpointPublisher.publish(indexShard, checkpoint);
                             // At this point since we have uploaded new segments, segment infos and segment metadata file,
                             // along with marking minSeqNoToKeep, upload has succeeded completely.
                             shouldRetry = false;

server/src/test/java/org/opensearch/index/shard/RemoteStoreRefreshListenerTests.java

@@ -29,7 +29,6 @@
 import org.opensearch.index.remote.RemoteRefreshSegmentTracker;
 import org.opensearch.index.store.RemoteSegmentStoreDirectory;
 import org.opensearch.index.store.Store;
-import org.opensearch.indices.replication.checkpoint.SegmentReplicationCheckpointPublisher;
 import org.opensearch.indices.replication.common.ReplicationType;
 import org.opensearch.threadpool.ThreadPool;
 
@@ -71,7 +70,6 @@ public void setup(boolean primary, int numberOfDocs) throws IOException {
         remoteRefreshSegmentPressureService.afterIndexShardCreated(indexShard);
         remoteStoreRefreshListener = new RemoteStoreRefreshListener(
             indexShard,
-            SegmentReplicationCheckpointPublisher.EMPTY,
             remoteRefreshSegmentPressureService.getRemoteRefreshSegmentTracker(indexShard.shardId())
         );
     }
@@ -415,7 +413,6 @@ private Tuple<RemoteStoreRefreshListener, RemoteRefreshSegmentPressureService> m
         remoteRefreshSegmentPressureService.afterIndexShardCreated(shard);
         RemoteStoreRefreshListener refreshListener = new RemoteStoreRefreshListener(
             shard,
-            SegmentReplicationCheckpointPublisher.EMPTY,
             remoteRefreshSegmentPressureService.getRemoteRefreshSegmentTracker(indexShard.shardId())
         );
         refreshListener.afterRefresh(true);