HBASE-27213 Add support for claim queue operation (#4708)

Signed-off-by: Xin Sun <[email protected]>

Author: Apache9

hbase-protocol-shaded/src/main/protobuf/server/master/MasterProcedure.proto

@@ -515,6 +515,7 @@ message UpdatePeerConfigStateData {
 
 message RemovePeerStateData {
   optional ReplicationPeer peer_config = 1;
+  repeated int64 ongoing_assign_replication_queues_proc_ids = 2;
 }
 
 message EnablePeerStateData {
@@ -711,9 +712,8 @@ message ModifyColumnFamilyStoreFileTrackerStateData {
 }
 
 enum AssignReplicationQueuesState {
-  ASSIGN_REPLICATION_QUEUES_PRE_CHECK = 1;
-  ASSIGN_REPLICATION_QUEUES_ADD_MISSING_QUEUES = 2;
-  ASSIGN_REPLICATION_QUEUES_CLAIM = 3;
+  ASSIGN_REPLICATION_QUEUES_ADD_MISSING_QUEUES = 1;
+  ASSIGN_REPLICATION_QUEUES_CLAIM = 2;
 }
 
 message AssignReplicationQueuesStateData {

hbase-server/src/main/java/org/apache/hadoop/hbase/master/replication/AssignReplicationQueuesProcedure.java

@@ -23,6 +23,7 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
+import java.util.stream.Collectors;
 import org.apache.hadoop.hbase.ServerName;
 import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;
 import org.apache.hadoop.hbase.master.procedure.ServerProcedureInterface;
@@ -102,8 +103,12 @@ private void addMissingQueues(MasterProcedureEnv env) throws ReplicationExceptio
   }
 
   private Flow claimQueues(MasterProcedureEnv env) throws ReplicationException {
+    Set<String> existingPeerIds = env.getReplicationPeerManager().listPeers(null).stream()
+      .map(ReplicationPeerDescription::getPeerId).collect(Collectors.toSet());
     ReplicationQueueStorage storage = env.getReplicationPeerManager().getQueueStorage();
-    List<ReplicationQueueId> queueIds = storage.listAllQueueIds(crashedServer);
+    // filter out replication queue for deleted peers
+    List<ReplicationQueueId> queueIds = storage.listAllQueueIds(crashedServer).stream()
+      .filter(q -> existingPeerIds.contains(q.getPeerId())).collect(Collectors.toList());
     if (queueIds.isEmpty()) {
       LOG.debug("Finish claiming replication queues for {}", crashedServer);
       // we are done
@@ -130,10 +135,6 @@ protected Flow executeFromState(MasterProcedureEnv env, AssignReplicationQueuesS
     throws ProcedureSuspendedException, ProcedureYieldException, InterruptedException {
     try {
       switch (state) {
-        case ASSIGN_REPLICATION_QUEUES_PRE_CHECK:
-          // TODO: reserved for implementing the fencing logic with Add/Remove/UpdatePeerProcedure
-          setNextState(AssignReplicationQueuesState.ASSIGN_REPLICATION_QUEUES_ADD_MISSING_QUEUES);
-          return Flow.HAS_MORE_STATE;
         case ASSIGN_REPLICATION_QUEUES_ADD_MISSING_QUEUES:
           addMissingQueues(env);
           retryCounter = null;
@@ -183,7 +184,7 @@ protected int getStateId(AssignReplicationQueuesState state) {
 
   @Override
   protected AssignReplicationQueuesState getInitialState() {
-    return AssignReplicationQueuesState.ASSIGN_REPLICATION_QUEUES_PRE_CHECK;
+    return AssignReplicationQueuesState.ASSIGN_REPLICATION_QUEUES_ADD_MISSING_QUEUES;
   }
 
   @Override

hbase-server/src/main/java/org/apache/hadoop/hbase/master/replication/ModifyPeerProcedure.java

@@ -74,7 +74,7 @@ protected abstract void prePeerModification(MasterProcedureEnv env)
    * update the peer storage.
    */
   protected abstract void postPeerModification(MasterProcedureEnv env)
-    throws IOException, ReplicationException;
+    throws IOException, ReplicationException, ProcedureSuspendedException;
 
   protected void releaseLatch(MasterProcedureEnv env) {
     ProcedurePrepareLatch.releaseLatch(latch, this);

hbase-server/src/main/java/org/apache/hadoop/hbase/master/replication/RemovePeerProcedure.java

@@ -18,10 +18,17 @@
 package org.apache.hadoop.hbase.master.replication;
 
 import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
 import org.apache.hadoop.hbase.client.replication.ReplicationPeerConfigUtil;
 import org.apache.hadoop.hbase.master.MasterCoprocessorHost;
 import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;
+import org.apache.hadoop.hbase.procedure2.Procedure;
+import org.apache.hadoop.hbase.procedure2.ProcedureExecutor;
 import org.apache.hadoop.hbase.procedure2.ProcedureStateSerializer;
+import org.apache.hadoop.hbase.procedure2.ProcedureSuspendedException;
 import org.apache.hadoop.hbase.replication.ReplicationException;
 import org.apache.hadoop.hbase.replication.ReplicationPeerConfig;
 import org.apache.yetus.audience.InterfaceAudience;
@@ -40,6 +47,8 @@ public class RemovePeerProcedure extends ModifyPeerProcedure {
 
   private ReplicationPeerConfig peerConfig;
 
+  private List<Long> ongoingAssignReplicationQueuesProcIds = Collections.emptyList();
+
   public RemovePeerProcedure() {
   }
 
@@ -64,15 +73,43 @@ protected void prePeerModification(MasterProcedureEnv env) throws IOException {
   @Override
   protected void updatePeerStorage(MasterProcedureEnv env) throws ReplicationException {
     env.getReplicationPeerManager().removePeer(peerId);
+    // record ongoing AssignReplicationQueuesProcedures after we update the peer storage
+    ongoingAssignReplicationQueuesProcIds = env.getMasterServices().getMasterProcedureExecutor()
+      .getProcedures().stream().filter(p -> p instanceof AssignReplicationQueuesProcedure)
+      .filter(p -> !p.isFinished()).map(Procedure::getProcId).collect(Collectors.toList());
   }
 
   private void removeRemoteWALs(MasterProcedureEnv env) throws IOException {
     env.getMasterServices().getSyncReplicationReplayWALManager().removePeerRemoteWALs(peerId);
   }
 
+  private void checkAssignReplicationQueuesFinished(MasterProcedureEnv env)
+    throws ProcedureSuspendedException {
+    if (ongoingAssignReplicationQueuesProcIds.isEmpty()) {
+      LOG.info("No ongoing assign replication queues procedures when removing peer {}, move on",
+        peerId);
+    }
+    ProcedureExecutor<MasterProcedureEnv> procExec =
+      env.getMasterServices().getMasterProcedureExecutor();
+    long[] unfinishedProcIds =
+      ongoingAssignReplicationQueuesProcIds.stream().map(procExec::getProcedure)
+        .filter(p -> p != null && !p.isFinished()).mapToLong(Procedure::getProcId).toArray();
+    if (unfinishedProcIds.length == 0) {
+      LOG.info(
+        "All assign replication queues procedures are finished when removing peer {}, move on",
+        peerId);
+    } else {
+      throw suspend(env.getMasterConfiguration(), backoff -> LOG.info(
+        "There are still {} pending assign replication queues procedures {} when removing peer {}, sleep {} secs",
+        unfinishedProcIds.length, Arrays.toString(unfinishedProcIds), peerId, backoff / 1000));
+    }
+  }
+
   @Override
   protected void postPeerModification(MasterProcedureEnv env)
-    throws IOException, ReplicationException {
+    throws IOException, ReplicationException, ProcedureSuspendedException {
+    checkAssignReplicationQueuesFinished(env);
+
     if (peerConfig.isSyncReplication()) {
       removeRemoteWALs(env);
     }
@@ -94,6 +131,7 @@ protected void serializeStateData(ProcedureStateSerializer serializer) throws IO
     if (peerConfig != null) {
       builder.setPeerConfig(ReplicationPeerConfigUtil.convert(peerConfig));
     }
+    builder.addAllOngoingAssignReplicationQueuesProcIds(ongoingAssignReplicationQueuesProcIds);
     serializer.serialize(builder.build());
   }
 
@@ -104,5 +142,6 @@ protected void deserializeStateData(ProcedureStateSerializer serializer) throws
     if (data.hasPeerConfig()) {
       this.peerConfig = ReplicationPeerConfigUtil.convert(data.getPeerConfig());
     }
+    ongoingAssignReplicationQueuesProcIds = data.getOngoingAssignReplicationQueuesProcIdsList();
   }
 }

hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceManager.java

@@ -236,7 +236,7 @@ public ReplicationSourceManager(ReplicationQueueStorage queueStorage,
    */
   void init() throws IOException {
     for (String id : this.replicationPeers.getAllPeerIds()) {
-      addSource(id);
+      addSource(id, true);
     }
   }
 
@@ -256,7 +256,7 @@ public void addPeer(String peerId) throws IOException {
       throw new IOException(e);
     }
     if (added) {
-      addSource(peerId);
+      addSource(peerId, false);
     }
   }
 
@@ -322,11 +322,16 @@ private ReplicationSourceInterface createSource(ReplicationQueueData queueData,
   /**
    * Add a normal source for the given peer on this region server. Meanwhile, add new replication
    * queue to storage. For the newly added peer, we only need to enqueue the latest log of each wal
-   * group and do replication
+   * group and do replication.
+   * <p/>
+   * We add a {@code init} parameter to indicate whether this is part of the initialization process.
+   * If so, we should skip adding the replication queues as this may introduce dead lock on region
+   * server start up and hbase:replication table online.
    * @param peerId the id of the replication peer
+   * @param init   whether this call is part of the initialization process
    * @return the source that was created
    */
-  void addSource(String peerId) throws IOException {
+  void addSource(String peerId, boolean init) throws IOException {
     ReplicationPeer peer = replicationPeers.getPeer(peerId);
     if (
       ReplicationUtils.LEGACY_REGION_REPLICATION_ENDPOINT_NAME
@@ -351,11 +356,16 @@ void addSource(String peerId) throws IOException {
           NavigableSet<String> wals = new TreeSet<>();
           wals.add(walPath.getName());
           walsByGroup.put(walPrefixAndPath.getKey(), wals);
-          // Abort RS and throw exception to make add peer failed
-          // TODO: can record the length of the current wal file so we could replicate less data
-          abortAndThrowIOExceptionWhenFail(
-            () -> this.queueStorage.setOffset(queueId, walPrefixAndPath.getKey(),
-              new ReplicationGroupOffset(walPath.getName(), 0), Collections.emptyMap()));
+          if (!init) {
+            // Abort RS and throw exception to make add peer failed
+            // Ideally we'd better use the current file size as offset so we can skip replicating
+            // the data before adding replication peer, but the problem is that the file may not end
+            // at a valid entry's ending, and the current WAL Reader implementation can not deal
+            // with reading from the middle of a WAL entry. Can improve later.
+            abortAndThrowIOExceptionWhenFail(
+              () -> this.queueStorage.setOffset(queueId, walPrefixAndPath.getKey(),
+                new ReplicationGroupOffset(walPath.getName(), 0), Collections.emptyMap()));
+          }
           src.enqueueLog(walPath);
           LOG.trace("Enqueued {} to source {} during source creation.", walPath, src.getQueueId());
         }
@@ -792,9 +802,15 @@ public void postLogRoll(Path newLog) throws IOException {
    * @return {@code true} means we should replicate the given {@code wal}, otherwise {@code false}.
    */
   private boolean shouldReplicate(ReplicationGroupOffset offset, String wal) {
-    if (offset == null || offset == ReplicationGroupOffset.BEGIN) {
+    // skip replicating meta wals
+    if (AbstractFSWALProvider.isMetaFile(wal)) {
       return false;
     }
+    // if no offset or the offset is just a place marker, replicate
+    if (offset == null || offset == ReplicationGroupOffset.BEGIN) {
+      return true;
+    }
+    // otherwise, compare the timestamp
     long walTs = AbstractFSWALProvider.getTimestamp(wal);
     long startWalTs = AbstractFSWALProvider.getTimestamp(offset.getWal());
     if (walTs < startWalTs) {
@@ -889,7 +905,6 @@ Comparator.<Path, Long> comparing(p -> AbstractFSWALProvider.getTimestamp(p.getN
         LOG.debug("Skip enqueuing log {} because it is before the start offset {}", file.getName(),
           groupOffset);
       }
-      walFilesPQ.add(file);
     }
     // the method is a bit long, so assign it to null here to avoid later we reuse it again by
     // mistake, we should use the sorted walFilesPQ instead

hbase-server/src/test/java/org/apache/hadoop/hbase/replication/TestClaimReplicationQueue.java

@@ -156,7 +156,7 @@ public void testClaim() throws Exception {
     hbaseAdmin.enableReplicationPeer(PEER_ID3);
 
     EMPTY = false;
-    // wait until the SCP finished, ClaimReplicationQueuesProcedure is a sub procedure of SCP
+    // wait until the SCP finished, AssignReplicationQueuesProcedure is a sub procedure of SCP
     UTIL1.waitFor(30000, () -> master.getProcedures().stream()
       .filter(p -> p instanceof ServerCrashProcedure).allMatch(Procedure::isSuccess));