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HDFS-7228. Fix TestDNFencing.testQueueingWithAppend. Contributed by Yongjun Zhang.

This commit is contained in:
Jing Zhao 2014-10-22 10:47:49 -07:00
parent b8f7966c7a
commit 1c8d191117
2 changed files with 46 additions and 7 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -308,6 +308,8 @@ Release 2.7.0 - UNRELEASED
HDFS-7252. small refinement to the use of isInAnEZ in FSNamesystem.
(Yi Liu via vinayakumarb)
HDFS-7226. Fix TestDNFencing.testQueueingWithAppend. (Yongjun Zhang via jing9)
Release 2.6.0 - UNRELEASED
INCOMPATIBLE CHANGES

51
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestDNFencing.java
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@ -415,6 +415,7 @@ public class TestDNFencing {
int numQueued = 0;
int numDN = cluster.getDataNodes().size();
// case 1: create file and call hflush after write
FSDataOutputStream out = fs.create(TEST_FILE_PATH);
try {
AppendTestUtil.write(out, 0, 10);
@ -422,29 +423,65 @@ public class TestDNFencing {
// Opening the file will report RBW replicas, but will be
// queued on the StandbyNode.
// However, the delivery of RBW messages is delayed by HDFS-7217 fix.
// Apply cluster.triggerBlockReports() to trigger the reporting sooner.
//
cluster.triggerBlockReports();
numQueued += numDN; // RBW messages
// The cluster.triggerBlockReports() call above does a full
// block report that incurs 3 extra RBW messages
numQueued += numDN; // RBW messages
} finally {
IOUtils.closeStream(out);
numQueued += numDN; // blockReceived messages
}
cluster.triggerBlockReports();
numQueued += numDN;
assertEquals(numQueued, cluster.getNameNode(1).getNamesystem().
getPendingDataNodeMessageCount());
// case 2: append to file and call hflush after write
try {
out = fs.append(TEST_FILE_PATH);
AppendTestUtil.write(out, 10, 10);
// RBW replicas once it's opened for append
numQueued += numDN;
out.hflush();
cluster.triggerBlockReports();
numQueued += numDN * 2; // RBW messages, see comments in case 1
} finally {
IOUtils.closeStream(out);
numQueued += numDN; // blockReceived
}
assertEquals(numQueued, cluster.getNameNode(1).getNamesystem().
getPendingDataNodeMessageCount());
// case 3: similar to case 2, except no hflush is called.
try {
out = fs.append(TEST_FILE_PATH);
AppendTestUtil.write(out, 20, 10);
} finally {
// The write operation in the try block is buffered, thus no RBW message
// is reported yet until the closeStream call here. When closeStream is
// called, before HDFS-7217 fix, there would be three RBW messages
// (blockReceiving), plus three FINALIZED messages (blockReceived)
// delivered to NN. However, because of HDFS-7217 fix, the reporting of
// RBW messages is postponed. In this case, they are even overwritten
// by the blockReceived messages of the same block when they are waiting
// to be delivered. All this happens within the closeStream() call.
// What's delivered to NN is the three blockReceived messages. See
// BPServiceActor#addPendingReplicationBlockInfo
//
IOUtils.closeStream(out);
numQueued += numDN; // blockReceived
}
cluster.triggerBlockReports();
numQueued += numDN;
LOG.info("Expect " + numQueued + " and got: " + cluster.getNameNode(1).getNamesystem().
getPendingDataNodeMessageCount());
assertEquals(numQueued, cluster.getNameNode(1).getNamesystem().
getPendingDataNodeMessageCount());
@ -458,7 +495,7 @@ public class TestDNFencing {
assertEquals(0, nn1.getNamesystem().getCorruptReplicaBlocks());
assertEquals(0, nn2.getNamesystem().getCorruptReplicaBlocks());
AppendTestUtil.check(fs, TEST_FILE_PATH, 20);
AppendTestUtil.check(fs, TEST_FILE_PATH, 30);
}
/**