HBASE-19623 Create replication endpoint asynchronously when adding a replication source

hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ReplicationPeer.java

@@ -53,6 +53,14 @@ public interface ReplicationPeer {
    */
   PeerState getPeerState();
 
+  /**
+   * Test whether the peer is enabled.
+   * @return {@code true} if enabled, otherwise {@code false}.
+   */
+  default boolean isPeerEnabled() {
+    return getPeerState() == PeerState.ENABLED;
+  }
+
   /**
    * Get the peer config object
    * @return the ReplicationPeerConfig for this peer

hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ReplicationPeers.java

@@ -18,6 +18,7 @@
 package org.apache.hadoop.hbase.replication;
 
 import java.io.IOException;
+import java.util.Collections;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
@@ -85,21 +86,6 @@ public class ReplicationPeers {
     peerCache.remove(peerId);
   }
 
-  /**
-   * Get the peer state for the specified connected remote slave cluster. The value might be read
-   * from cache, so it is recommended to use {@link #peerStorage } to read storage directly if
-   * reading the state after enabling or disabling it.
-   * @param peerId a short that identifies the cluster
-   * @return true if replication is enabled, false otherwise.
-   */
-  public boolean isPeerEnabled(String peerId) {
-    ReplicationPeer replicationPeer = this.peerCache.get(peerId);
-    if (replicationPeer == null) {
-      throw new IllegalArgumentException("Peer with id= " + peerId + " is not cached");
-    }
-    return replicationPeer.getPeerState() == PeerState.ENABLED;
-  }
-
   /**
    * Returns the ReplicationPeerImpl for the specified cached peer. This ReplicationPeer will
    * continue to track changes to the Peer's state and config. This method returns null if no peer
@@ -117,7 +103,7 @@ public class ReplicationPeers {
    * @return a Set of Strings for peerIds
    */
   public Set<String> getAllPeerIds() {
-    return peerCache.keySet();
+    return Collections.unmodifiableSet(peerCache.keySet());
   }
 
   public static Configuration getPeerClusterConfiguration(ReplicationPeerConfig peerConfig,

hbase-replication/src/main/java/org/apache/hadoop/hbase/replication/ZKReplicationPeerStorage.java

@@ -19,7 +19,6 @@ package org.apache.hadoop.hbase.replication;
 
 import java.util.Arrays;
 import java.util.List;
-
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.client.replication.ReplicationPeerConfigUtil;
 import org.apache.hadoop.hbase.exceptions.DeserializationException;
@@ -30,8 +29,6 @@ import org.apache.hadoop.hbase.zookeeper.ZKWatcher;
 import org.apache.hadoop.hbase.zookeeper.ZNodePaths;
 import org.apache.yetus.audience.InterfaceAudience;
 import org.apache.zookeeper.KeeperException;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import org.apache.hadoop.hbase.shaded.protobuf.generated.ReplicationProtos;
 
@@ -41,8 +38,6 @@ import org.apache.hadoop.hbase.shaded.protobuf.generated.ReplicationProtos;
 @InterfaceAudience.Private
 class ZKReplicationPeerStorage extends ZKReplicationStorageBase implements ReplicationPeerStorage {
 
-  private static final Logger LOG = LoggerFactory.getLogger(ZKReplicationPeerStorage.class);
-
   public static final byte[] ENABLED_ZNODE_BYTES =
     toByteArray(ReplicationProtos.ReplicationState.State.ENABLED);
   public static final byte[] DISABLED_ZNODE_BYTES =
@@ -126,7 +121,7 @@ class ZKReplicationPeerStorage extends ZKReplicationStorageBase implements Repli
   @Override
   public List<String> listPeerIds() throws ReplicationException {
     try {
-      return CollectionUtils.nullToEmpty(ZKUtil.listChildrenAndWatchThem(zookeeper, peersZNode));
+      return CollectionUtils.nullToEmpty(ZKUtil.listChildrenNoWatch(zookeeper, peersZNode));
     } catch (KeeperException e) {
       throw new ReplicationException("Cannot get the list of peers", e);
     }

hbase-replication/src/test/java/org/apache/hadoop/hbase/replication/TestReplicationStateBasic.java

@@ -225,11 +225,6 @@ public abstract class TestReplicationStateBasic {
       fail("Should have thrown an IllegalArgumentException when passed a bogus peerId");
     } catch (ReplicationException e) {
     }
-    try {
-      rp.isPeerEnabled("bogus");
-      fail("Should have thrown an IllegalArgumentException when passed a bogus peerId");
-    } catch (IllegalArgumentException e) {
-    }
 
     try {
       assertFalse(rp.addPeer("bogus"));
@@ -245,12 +240,6 @@ public abstract class TestReplicationStateBasic {
     rp.getPeerStorage().addPeer(ID_TWO, new ReplicationPeerConfig().setClusterKey(KEY_TWO), true);
     assertNumberOfPeers(2);
 
-    // Test methods with a peer that is added but not connected
-    try {
-      rp.isPeerEnabled(ID_ONE);
-      fail("There are no connected peers, should have thrown an IllegalArgumentException");
-    } catch (IllegalArgumentException e) {
-    }
     assertEquals(KEY_ONE, ZKConfig.getZooKeeperClusterKey(ReplicationPeers
         .getPeerClusterConfiguration(rp.getPeerStorage().getPeerConfig(ID_ONE), rp.getConf())));
     rp.getPeerStorage().removePeer(ID_ONE);
@@ -261,7 +250,7 @@ public abstract class TestReplicationStateBasic {
     rp.getPeerStorage().addPeer(ID_ONE, new ReplicationPeerConfig().setClusterKey(KEY_ONE), true);
     rp.addPeer(ID_ONE);
     assertNumberOfPeers(2);
-    assertTrue(rp.isPeerEnabled(ID_ONE));
+    assertTrue(rp.getPeer(ID_ONE).isPeerEnabled());
     rp.getPeerStorage().setPeerState(ID_ONE, false);
     // now we do not rely on zk watcher to trigger the state change so we need to trigger it
     // manually...
@@ -279,11 +268,6 @@ public abstract class TestReplicationStateBasic {
     // Disconnect peer
     rp.removePeer(ID_ONE);
     assertNumberOfPeers(2);
-    try {
-      rp.isPeerEnabled(ID_ONE);
-      fail("There are no connected peers, should have thrown an IllegalArgumentException");
-    } catch (IllegalArgumentException e) {
-    }
   }
 
   protected void assertConnectedPeerStatus(boolean status, String peerId) throws Exception {
@@ -292,7 +276,7 @@ public abstract class TestReplicationStateBasic {
       fail("ConnectedPeerStatus was " + !status + " but expected " + status + " in ZK");
     }
     while (true) {
-      if (status == rp.isPeerEnabled(peerId)) {
+      if (status == rp.getPeer(peerId).isPeerEnabled()) {
         return;
       }
       if (zkTimeoutCount < ZK_MAX_COUNT) {

hbase-replication/src/test/java/org/apache/hadoop/hbase/replication/TestZKReplicationPeerStorage.java

@@ -80,15 +80,11 @@ public class TestZKReplicationPeerStorage {
 
   private ReplicationPeerConfig getConfig(int seed) {
     Random rand = new Random(seed);
-    ReplicationPeerConfig config = new ReplicationPeerConfig();
+    return ReplicationPeerConfig.newBuilder().setClusterKey(Long.toHexString(rand.nextLong()))
-    config.setClusterKey(Long.toHexString(rand.nextLong()));
+        .setReplicationEndpointImpl(Long.toHexString(rand.nextLong()))
-    config.setReplicationEndpointImpl(Long.toHexString(rand.nextLong()));
+        .setNamespaces(randNamespaces(rand)).setExcludeNamespaces(randNamespaces(rand))
-    config.setNamespaces(randNamespaces(rand));
+        .setTableCFsMap(randTableCFs(rand)).setReplicateAllUserTables(rand.nextBoolean())
-    config.setExcludeNamespaces(randNamespaces(rand));
+        .setBandwidth(rand.nextInt(1000)).build();
-    config.setTableCFsMap(randTableCFs(rand));
-    config.setReplicateAllUserTables(rand.nextBoolean());
-    config.setBandwidth(rand.nextInt(1000));
-    return config;
   }
 
   private void assertSetEquals(Set<String> expected, Set<String> actual) {

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

@@ -18,8 +18,6 @@
 
 package org.apache.hadoop.hbase.replication.regionserver;
 
-import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;
-
 import java.io.IOException;
 import java.net.ConnectException;
 import java.net.SocketTimeoutException;
@@ -39,7 +37,6 @@ import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
-
 import org.apache.commons.lang3.StringUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.Path;
@@ -48,22 +45,24 @@ import org.apache.hadoop.hbase.HBaseConfiguration;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.TableNotFoundException;
-import org.apache.yetus.audience.InterfaceAudience;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.apache.hadoop.hbase.client.ClusterConnection;
 import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.client.ConnectionFactory;
 import org.apache.hadoop.hbase.ipc.RpcServer;
 import org.apache.hadoop.hbase.protobuf.ReplicationProtbufUtil;
-import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.AdminService.BlockingInterface;
 import org.apache.hadoop.hbase.replication.HBaseReplicationEndpoint;
-import org.apache.hadoop.hbase.replication.ReplicationPeer.PeerState;
 import org.apache.hadoop.hbase.replication.regionserver.ReplicationSinkManager.SinkPeer;
 import org.apache.hadoop.hbase.util.Bytes;
 import org.apache.hadoop.hbase.util.FSUtils;
 import org.apache.hadoop.hbase.wal.WAL.Entry;
 import org.apache.hadoop.ipc.RemoteException;
+import org.apache.yetus.audience.InterfaceAudience;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;
+
+import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.AdminService.BlockingInterface;
 
 /**
  * A {@link org.apache.hadoop.hbase.replication.ReplicationEndpoint}
@@ -416,7 +415,7 @@ public class HBaseInterClusterReplicationEndpoint extends HBaseReplicationEndpoi
   }
 
   protected boolean isPeerEnabled() {
-    return ctx.getReplicationPeer().getPeerState() == PeerState.ENABLED;
+    return ctx.getReplicationPeer().isPeerEnabled();
   }
 
   @Override

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

@@ -28,8 +28,7 @@ import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hbase.Server;
 import org.apache.hadoop.hbase.ServerName;
-import org.apache.hadoop.hbase.replication.ReplicationEndpoint;
+import org.apache.hadoop.hbase.replication.ReplicationPeer;
-import org.apache.hadoop.hbase.replication.ReplicationPeers;
 import org.apache.hadoop.hbase.replication.ReplicationQueueStorage;
 import org.apache.hadoop.hbase.util.FSUtils;
 import org.apache.hadoop.hbase.util.Threads;
@@ -51,11 +50,11 @@ public class RecoveredReplicationSource extends ReplicationSource {
 
   @Override
   public void init(Configuration conf, FileSystem fs, ReplicationSourceManager manager,
-      ReplicationQueueStorage queueStorage, ReplicationPeers replicationPeers, Server server,
+      ReplicationQueueStorage queueStorage, ReplicationPeer replicationPeer, Server server,
-      String peerClusterZnode, UUID clusterId, ReplicationEndpoint replicationEndpoint,
+      String peerClusterZnode, UUID clusterId, WALFileLengthProvider walFileLengthProvider,
-      WALFileLengthProvider walFileLengthProvider, MetricsSource metrics) throws IOException {
+      MetricsSource metrics) throws IOException {
-    super.init(conf, fs, manager, queueStorage, replicationPeers, server, peerClusterZnode,
+    super.init(conf, fs, manager, queueStorage, replicationPeer, server, peerClusterZnode,
-      clusterId, replicationEndpoint, walFileLengthProvider, metrics);
+      clusterId, walFileLengthProvider, metrics);
     this.actualPeerId = this.replicationQueueInfo.getPeerId();
   }
 

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

@@ -38,14 +38,16 @@ import org.apache.hadoop.hbase.HBaseConfiguration;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.Server;
 import org.apache.hadoop.hbase.ServerName;
+import org.apache.hadoop.hbase.TableDescriptors;
 import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.regionserver.HRegionServer;
 import org.apache.hadoop.hbase.regionserver.RSRpcServices;
+import org.apache.hadoop.hbase.regionserver.RegionServerCoprocessorHost;
 import org.apache.hadoop.hbase.replication.ChainWALEntryFilter;
 import org.apache.hadoop.hbase.replication.ClusterMarkingEntryFilter;
 import org.apache.hadoop.hbase.replication.ReplicationEndpoint;
 import org.apache.hadoop.hbase.replication.ReplicationException;
 import org.apache.hadoop.hbase.replication.ReplicationPeer;
-import org.apache.hadoop.hbase.replication.ReplicationPeers;
 import org.apache.hadoop.hbase.replication.ReplicationQueueInfo;
 import org.apache.hadoop.hbase.replication.ReplicationQueueStorage;
 import org.apache.hadoop.hbase.replication.SystemTableWALEntryFilter;
@@ -82,7 +84,7 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
   // per group queue size, keep no more than this number of logs in each wal group
   protected int queueSizePerGroup;
   protected ReplicationQueueStorage queueStorage;
-  private ReplicationPeers replicationPeers;
+  private ReplicationPeer replicationPeer;
 
   protected Configuration conf;
   protected ReplicationQueueInfo replicationQueueInfo;
@@ -112,6 +114,8 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
   private MetricsSource metrics;
   // WARN threshold for the number of queued logs, defaults to 2
   private int logQueueWarnThreshold;
+  // whether the replication endpoint has been initialized
+  private volatile boolean endpointInitialized = false;
   // ReplicationEndpoint which will handle the actual replication
   private ReplicationEndpoint replicationEndpoint;
   // A filter (or a chain of filters) for the WAL entries.
@@ -133,22 +137,19 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
 
   /**
    * Instantiation method used by region servers
-   *
    * @param conf configuration to use
    * @param fs file system to use
    * @param manager replication manager to ping to
    * @param server the server for this region server
    * @param peerClusterZnode the name of our znode
    * @param clusterId unique UUID for the cluster
-   * @param replicationEndpoint the replication endpoint implementation
    * @param metrics metrics for replication source
-   * @throws IOException
    */
   @Override
   public void init(Configuration conf, FileSystem fs, ReplicationSourceManager manager,
-      ReplicationQueueStorage queueStorage, ReplicationPeers replicationPeers, Server server,
+      ReplicationQueueStorage queueStorage, ReplicationPeer replicationPeer, Server server,
-      String peerClusterZnode, UUID clusterId, ReplicationEndpoint replicationEndpoint,
+      String peerClusterZnode, UUID clusterId, WALFileLengthProvider walFileLengthProvider,
-      WALFileLengthProvider walFileLengthProvider, MetricsSource metrics) throws IOException {
+      MetricsSource metrics) throws IOException {
     this.server = server;
     this.conf = HBaseConfiguration.create(conf);
     this.waitOnEndpointSeconds =
@@ -160,7 +161,7 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
         this.conf.getInt("replication.source.maxretriesmultiplier", 300); // 5 minutes @ 1 sec per
     this.queueSizePerGroup = this.conf.getInt("hbase.regionserver.maxlogs", 32);
     this.queueStorage = queueStorage;
-    this.replicationPeers = replicationPeers;
+    this.replicationPeer = replicationPeer;
     this.manager = manager;
     this.fs = fs;
     this.metrics = metrics;
@@ -171,7 +172,6 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
     // ReplicationQueueInfo parses the peerId out of the znode for us
     this.peerId = this.replicationQueueInfo.getPeerId();
     this.logQueueWarnThreshold = this.conf.getInt("replication.source.log.queue.warn", 2);
-    this.replicationEndpoint = replicationEndpoint;
 
     defaultBandwidth = this.conf.getLong("replication.source.per.peer.node.bandwidth", 0);
     currentBandwidth = getCurrentBandwidth();
@@ -196,7 +196,7 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
     if (queue == null) {
       queue = new PriorityBlockingQueue<>(queueSizePerGroup, new LogsComparator());
       queues.put(logPrefix, queue);
-      if (this.sourceRunning) {
+      if (this.isSourceActive() && this.endpointInitialized) {
         // new wal group observed after source startup, start a new worker thread to track it
         // notice: it's possible that log enqueued when this.running is set but worker thread
         // still not launched, so it's necessary to check workerThreads before start the worker
@@ -222,7 +222,7 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
       // A peerId will not have "-" in its name, see HBASE-11394
       peerId = peerClusterZnode.split("-")[0];
     }
-    Map<TableName, List<String>> tableCFMap = replicationPeers.getPeer(peerId).getTableCFs();
+    Map<TableName, List<String>> tableCFMap = replicationPeer.getTableCFs();
     if (tableCFMap != null) {
       List<String> tableCfs = tableCFMap.get(tableName);
       if (tableCFMap.containsKey(tableName)
@@ -241,21 +241,59 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
     }
   }
 
+  private void initAndStartReplicationEndpoint() throws Exception {
+    RegionServerCoprocessorHost rsServerHost = null;
+    TableDescriptors tableDescriptors = null;
+    if (server instanceof HRegionServer) {
+      rsServerHost = ((HRegionServer) server).getRegionServerCoprocessorHost();
+      tableDescriptors = ((HRegionServer) server).getTableDescriptors();
+    }
+    String replicationEndpointImpl = replicationPeer.getPeerConfig().getReplicationEndpointImpl();
+    if (replicationEndpointImpl == null) {
+      // Default to HBase inter-cluster replication endpoint
+      replicationEndpointImpl = HBaseInterClusterReplicationEndpoint.class.getName();
+    }
+    replicationEndpoint =
+        Class.forName(replicationEndpointImpl).asSubclass(ReplicationEndpoint.class).newInstance();
+    if (rsServerHost != null) {
+      ReplicationEndpoint newReplicationEndPoint =
+          rsServerHost.postCreateReplicationEndPoint(replicationEndpoint);
+      if (newReplicationEndPoint != null) {
+        // Override the newly created endpoint from the hook with configured end point
+        replicationEndpoint = newReplicationEndPoint;
+      }
+    }
+    replicationEndpoint
+        .init(new ReplicationEndpoint.Context(conf, replicationPeer.getConfiguration(), fs, peerId,
+            clusterId, replicationPeer, metrics, tableDescriptors, server));
+    replicationEndpoint.start();
+    replicationEndpoint.awaitRunning(waitOnEndpointSeconds, TimeUnit.SECONDS);
+  }
+
   @Override
   public void run() {
     // mark we are running now
     this.sourceRunning = true;
-    try {
-      // start the endpoint, connect to the cluster
-      this.replicationEndpoint.start();
-      this.replicationEndpoint.awaitRunning(this.waitOnEndpointSeconds, TimeUnit.SECONDS);
-    } catch (Exception ex) {
-      LOG.warn("Error starting ReplicationEndpoint, exiting", ex);
-      uninitialize();
-      throw new RuntimeException(ex);
-    }
 
     int sleepMultiplier = 1;
+    while (this.isSourceActive()) {
+      try {
+        initAndStartReplicationEndpoint();
+        break;
+      } catch (Exception e) {
+        LOG.warn("Error starting ReplicationEndpoint, retrying", e);
+        if (replicationEndpoint != null) {
+          replicationEndpoint.stop();
+          replicationEndpoint = null;
+        }
+        if (sleepForRetries("Error starting ReplicationEndpoint", sleepMultiplier)) {
+          sleepMultiplier++;
+        }
+      }
+    }
+    this.endpointInitialized = true;
+
+    sleepMultiplier = 1;
     // delay this until we are in an asynchronous thread
     while (this.isSourceActive() && this.peerClusterId == null) {
       this.peerClusterId = replicationEndpoint.getPeerUUID();
@@ -288,8 +326,8 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
 
   private void initializeWALEntryFilter() {
     // get the WALEntryFilter from ReplicationEndpoint and add it to default filters
-    ArrayList<WALEntryFilter> filters = Lists.newArrayList(
+    ArrayList<WALEntryFilter> filters =
-      (WALEntryFilter)new SystemTableWALEntryFilter());
+      Lists.<WALEntryFilter> newArrayList(new SystemTableWALEntryFilter());
     WALEntryFilter filterFromEndpoint = this.replicationEndpoint.getWALEntryfilter();
     if (filterFromEndpoint != null) {
       filters.add(filterFromEndpoint);
@@ -309,7 +347,6 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
       worker.startup(getUncaughtExceptionHandler());
       worker.setWALReader(startNewWALReader(worker.getName(), walGroupId, queue,
         worker.getStartPosition()));
-      workerThreads.put(walGroupId, worker);
     }
   }
 
@@ -370,25 +407,11 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
   }
 
   private long getCurrentBandwidth() {
-    ReplicationPeer replicationPeer = this.replicationPeers.getPeer(peerId);
+    long peerBandwidth = replicationPeer.getPeerBandwidth();
-    long peerBandwidth = replicationPeer != null ? replicationPeer.getPeerBandwidth() : 0;
     // user can set peer bandwidth to 0 to use default bandwidth
     return peerBandwidth != 0 ? peerBandwidth : defaultBandwidth;
   }
 
-  private void uninitialize() {
-    LOG.debug("Source exiting " + this.peerId);
-    metrics.clear();
-    if (this.replicationEndpoint.isRunning() || this.replicationEndpoint.isStarting()) {
-      this.replicationEndpoint.stop();
-      try {
-        this.replicationEndpoint.awaitTerminated(this.waitOnEndpointSeconds, TimeUnit.SECONDS);
-      } catch (TimeoutException e) {
-        LOG.warn("Failed termination after " + this.waitOnEndpointSeconds + " seconds.");
-      }
-    }
-  }
-
   /**
    * Do the sleeping logic
    * @param msg Why we sleep
@@ -410,12 +433,11 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
 
   /**
    * check whether the peer is enabled or not
-   *
    * @return true if the peer is enabled, otherwise false
    */
   @Override
   public boolean isPeerEnabled() {
-    return this.replicationPeers.isPeerEnabled(this.peerId);
+    return replicationPeer.isPeerEnabled();
   }
 
   @Override
@@ -427,8 +449,8 @@ public class ReplicationSource extends Thread implements ReplicationSourceInterf
         LOG.error("Unexpected exception in ReplicationSource", e);
       }
     };
-    Threads
+    Threads.setDaemonThreadRunning(this, n + ".replicationSource," + this.peerClusterZnode,
-        .setDaemonThreadRunning(this, n + ".replicationSource," + this.peerClusterZnode, handler);
+      handler);
   }
 
   @Override

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

@@ -30,7 +30,7 @@ import org.apache.hadoop.hbase.ServerName;
 import org.apache.hadoop.hbase.TableName;
 import org.apache.hadoop.hbase.replication.ReplicationEndpoint;
 import org.apache.hadoop.hbase.replication.ReplicationException;
-import org.apache.hadoop.hbase.replication.ReplicationPeers;
+import org.apache.hadoop.hbase.replication.ReplicationPeer;
 import org.apache.hadoop.hbase.replication.ReplicationQueueStorage;
 import org.apache.hadoop.hbase.util.Pair;
 import org.apache.hadoop.hbase.wal.WAL.Entry;
@@ -50,9 +50,9 @@ public interface ReplicationSourceInterface {
    * @param server the server for this region server
    */
   void init(Configuration conf, FileSystem fs, ReplicationSourceManager manager,
-      ReplicationQueueStorage queueStorage, ReplicationPeers replicationPeers, Server server,
+      ReplicationQueueStorage queueStorage, ReplicationPeer replicationPeer, Server server,
-      String peerClusterZnode, UUID clusterId, ReplicationEndpoint replicationEndpoint,
+      String peerClusterZnode, UUID clusterId, WALFileLengthProvider walFileLengthProvider,
-      WALFileLengthProvider walFileLengthProvider, MetricsSource metrics) throws IOException;
+      MetricsSource metrics) throws IOException;
 
   /**
    * Add a log to the list of logs to replicate

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

@@ -47,11 +47,7 @@ import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hbase.HConstants;
 import org.apache.hadoop.hbase.Server;
 import org.apache.hadoop.hbase.ServerName;
-import org.apache.hadoop.hbase.TableDescriptors;
 import org.apache.hadoop.hbase.TableName;
-import org.apache.hadoop.hbase.regionserver.HRegionServer;
-import org.apache.hadoop.hbase.regionserver.RegionServerCoprocessorHost;
-import org.apache.hadoop.hbase.replication.ReplicationEndpoint;
 import org.apache.hadoop.hbase.replication.ReplicationException;
 import org.apache.hadoop.hbase.replication.ReplicationListener;
 import org.apache.hadoop.hbase.replication.ReplicationPeer;
@@ -491,49 +487,14 @@ public class ReplicationSourceManager implements ReplicationListener {
    * @param peerId the id of the peer cluster
    * @return the created source
    */
-  private ReplicationSourceInterface getReplicationSource(String peerId, ReplicationPeer peer)
+  private ReplicationSourceInterface getReplicationSource(String peerId,
-      throws IOException {
+      ReplicationPeer replicationPeer) throws IOException {
-    RegionServerCoprocessorHost rsServerHost = null;
-    TableDescriptors tableDescriptors = null;
-    if (server instanceof HRegionServer) {
-      rsServerHost = ((HRegionServer) server).getRegionServerCoprocessorHost();
-      tableDescriptors = ((HRegionServer) server).getTableDescriptors();
-    }
-
     ReplicationSourceInterface src = ReplicationSourceFactory.create(conf, peerId);
 
-    ReplicationEndpoint replicationEndpoint = null;
-    try {
-      String replicationEndpointImpl = peer.getPeerConfig().getReplicationEndpointImpl();
-      if (replicationEndpointImpl == null) {
-        // Default to HBase inter-cluster replication endpoint
-        replicationEndpointImpl = HBaseInterClusterReplicationEndpoint.class.getName();
-      }
-      replicationEndpoint = Class.forName(replicationEndpointImpl)
-          .asSubclass(ReplicationEndpoint.class).newInstance();
-      if (rsServerHost != null) {
-        ReplicationEndpoint newReplicationEndPoint =
-            rsServerHost.postCreateReplicationEndPoint(replicationEndpoint);
-        if (newReplicationEndPoint != null) {
-          // Override the newly created endpoint from the hook with configured end point
-          replicationEndpoint = newReplicationEndPoint;
-        }
-      }
-    } catch (Exception e) {
-      LOG.warn("Passed replication endpoint implementation throws errors" +
-        " while initializing ReplicationSource for peer: " + peerId, e);
-      throw new IOException(e);
-    }
-
     MetricsSource metrics = new MetricsSource(peerId);
     // init replication source
-    src.init(conf, fs, this, queueStorage, replicationPeers, server, peerId, clusterId,
+    src.init(conf, fs, this, queueStorage, replicationPeer, server, peerId, clusterId,
-      replicationEndpoint, walFileLengthProvider, metrics);
+      walFileLengthProvider, metrics);
-
-    // init replication endpoint
-    replicationEndpoint.init(new ReplicationEndpoint.Context(conf, peer.getConfiguration(), fs,
-        peerId, clusterId, peer, metrics, tableDescriptors, server));
-
     return src;
   }
 

hbase-server/src/test/java/org/apache/hadoop/hbase/client/TestAsyncReplicationAdminApi.java

@@ -44,7 +44,6 @@ import org.apache.hadoop.hbase.replication.ReplicationQueueStorage;
 import org.apache.hadoop.hbase.replication.ReplicationStorageFactory;
 import org.apache.hadoop.hbase.testclassification.ClientTests;
 import org.apache.hadoop.hbase.testclassification.LargeTests;
-import org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient;
 import org.junit.After;
 import org.junit.BeforeClass;
 import org.junit.ClassRule;
@@ -75,7 +74,6 @@ public class TestAsyncReplicationAdminApi extends TestAsyncAdminBase {
     TEST_UTIL.getConfiguration().setInt(HConstants.HBASE_CLIENT_OPERATION_TIMEOUT, 120000);
     TEST_UTIL.getConfiguration().setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 2);
     TEST_UTIL.getConfiguration().setInt(START_LOG_ERRORS_AFTER_COUNT_KEY, 0);
-    TEST_UTIL.getConfiguration().setInt(ReadOnlyZKClient.RECOVERY_RETRY, 1);
     TEST_UTIL.startMiniCluster();
     ASYNC_CONN = ConnectionFactory.createAsyncConnection(TEST_UTIL.getConfiguration()).get();
   }

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

@@ -50,7 +50,6 @@ import org.apache.hadoop.hbase.replication.TestReplicationEndpoint.InterClusterR
 import org.apache.hadoop.hbase.replication.TestReplicationEndpoint.ReplicationEndpointForTest;
 import org.apache.hadoop.hbase.testclassification.ClientTests;
 import org.apache.hadoop.hbase.testclassification.MediumTests;
-import org.apache.hadoop.hbase.zookeeper.ReadOnlyZKClient;
 import org.junit.After;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
@@ -90,7 +89,6 @@ public class TestReplicationAdmin {
   @BeforeClass
   public static void setUpBeforeClass() throws Exception {
     TEST_UTIL.getConfiguration().setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER, 1);
-    TEST_UTIL.getConfiguration().setInt(ReadOnlyZKClient.RECOVERY_RETRY, 1);
     TEST_UTIL.startMiniCluster();
     admin = new ReplicationAdmin(TEST_UTIL.getConfiguration());
     hbaseAdmin = TEST_UTIL.getAdmin();

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

@@ -21,6 +21,7 @@ import java.io.IOException;
 import java.util.List;
 import java.util.UUID;
 import java.util.concurrent.atomic.AtomicBoolean;
+
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
@@ -48,9 +49,9 @@ public class ReplicationSourceDummy implements ReplicationSourceInterface {
 
   @Override
   public void init(Configuration conf, FileSystem fs, ReplicationSourceManager manager,
-      ReplicationQueueStorage rq, ReplicationPeers rp, Server server, String peerClusterId,
+      ReplicationQueueStorage rq, ReplicationPeer rp, Server server, String peerClusterId,
-      UUID clusterId, ReplicationEndpoint replicationEndpoint,
+      UUID clusterId, WALFileLengthProvider walFileLengthProvider, MetricsSource metrics)
-      WALFileLengthProvider walFileLengthProvider, MetricsSource metrics) throws IOException {
+      throws IOException {
     this.manager = manager;
     this.peerClusterId = peerClusterId;
     this.metrics = metrics;

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

@@ -162,15 +162,14 @@ public class TestReplicationSource {
       }
     };
     replicationEndpoint.start();
-    ReplicationPeers mockPeers = Mockito.mock(ReplicationPeers.class);
     ReplicationPeer mockPeer = Mockito.mock(ReplicationPeer.class);
     Mockito.when(mockPeer.getPeerBandwidth()).thenReturn(0L);
     Configuration testConf = HBaseConfiguration.create();
     testConf.setInt("replication.source.maxretriesmultiplier", 1);
     ReplicationSourceManager manager = Mockito.mock(ReplicationSourceManager.class);
     Mockito.when(manager.getTotalBufferUsed()).thenReturn(new AtomicLong());
-    source.init(testConf, null, manager, null, mockPeers, null, "testPeer", null,
+    source.init(testConf, null, manager, null, mockPeer, null, "testPeer", null,
-      replicationEndpoint, p -> OptionalLong.empty(), null);
+      p -> OptionalLong.empty(), null);
     ExecutorService executor = Executors.newSingleThreadExecutor();
     Future<?> future = executor.submit(new Runnable() {
 

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

@@ -64,8 +64,8 @@ import org.apache.hadoop.hbase.client.RegionInfo;
 import org.apache.hadoop.hbase.client.RegionInfoBuilder;
 import org.apache.hadoop.hbase.regionserver.HRegionServer;
 import org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl;
-import org.apache.hadoop.hbase.replication.ReplicationEndpoint;
 import org.apache.hadoop.hbase.replication.ReplicationFactory;
+import org.apache.hadoop.hbase.replication.ReplicationPeer;
 import org.apache.hadoop.hbase.replication.ReplicationPeerConfig;
 import org.apache.hadoop.hbase.replication.ReplicationPeers;
 import org.apache.hadoop.hbase.replication.ReplicationQueueStorage;
@@ -736,9 +736,9 @@ public abstract class TestReplicationSourceManager {
 
     @Override
     public void init(Configuration conf, FileSystem fs, ReplicationSourceManager manager,
-        ReplicationQueueStorage rq, ReplicationPeers rp, Server server, String peerClusterId,
+        ReplicationQueueStorage rq, ReplicationPeer rp, Server server, String peerClusterId,
-        UUID clusterId, ReplicationEndpoint replicationEndpoint,
+        UUID clusterId, WALFileLengthProvider walFileLengthProvider, MetricsSource metrics)
-        WALFileLengthProvider walFileLengthProvider, MetricsSource metrics) throws IOException {
+        throws IOException {
       throw new IOException("Failing deliberately");
     }
   }