HDFS-6015. Fix TestBlockRecovery#testRaceBetweenReplicaRecoveryAndFinalizeBlock. Contributed by Kihwal Lee.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-5535@1571785 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES_HDFS-5535.txt

@@ -90,3 +90,6 @@ HDFS-5535 subtasks:
     usage message. (Vinayakumar B via szetszwo)
 
     HDFS-6014. Fix findbug warnings introduced by HDFS-5583. (kihwal)
+
+    HDFS-6015. Fix TestBlockRecovery
+    #testRaceBetweenReplicaRecoveryAndFinalizeBlock. (kihwal)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockReceiver.java

@@ -761,7 +761,13 @@ void receiveBlock(
       }
       if (responder != null) {
         try {
-          responder.join(datanode.getDnConf().getXceiverStopTimeout());
+          responder.interrupt();
+          // join() on the responder should timeout a bit earlier than the
+          // configured deadline. Otherwise, the join() on this thread will
+          // likely timeout as well.
+          long joinTimeout = datanode.getDnConf().getXceiverStopTimeout();
+          joinTimeout = joinTimeout > 1  ? joinTimeout*8/10 : joinTimeout;
+          responder.join(joinTimeout);
           if (responder.isAlive()) {
             String msg = "Join on responder thread " + responder
                 + " timed out";

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestBlockRecovery.java

@@ -586,6 +586,7 @@ public void testRaceBetweenReplicaRecoveryAndFinalizeBlock() throws Exception {
     tearDown();// Stop the Mocked DN started in startup()
 
     Configuration conf = new HdfsConfiguration();
+    conf.set(DFSConfigKeys.DFS_DATANODE_XCEIVER_STOP_TIMEOUT_MILLIS_KEY, "1000");
     MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
         .nnTopology(MiniDFSNNTopology.simpleSingleNN(8020, 50070))
         .numDataNodes(1).build();