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HDFS-8025. Addendum fix for HDFS-3087 Decomissioning on NN restart can complete without blocks being replicated. Contributed by Ming Ma.

This commit is contained in:
Andrew Wang 2015-04-08 16:09:17 -07:00
parent 82d56b337d
commit 5a540c3d31
3 changed files with 20 additions and 20 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -399,6 +399,9 @@ Release 2.8.0 - UNRELEASED
HDFS-8076. Code cleanup for DFSInputStream: use offset instead of
LocatedBlock when possible. (Zhe Zhang via wang)
HDFS-8025. Addendum fix for HDFS-3087 Decomissioning on NN restart can
complete without blocks being replicated. (Ming Ma via wang)
OPTIMIZATIONS
HDFS-8026. Trace FSOutputSummer#writeChecksumChunks rather than

5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
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@ -3305,6 +3305,11 @@ public class BlockManager {
* liveness. Dead nodes cannot always be safely decommissioned.
*/
boolean isNodeHealthyForDecommission(DatanodeDescriptor node) {
if (!node.checkBlockReportReceived()) {
LOG.info("Node {} hasn't sent its first block report.", node);
return false;
}
if (node.isAlive) {
return true;
}

32
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDecommission.java
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@ -882,9 +882,12 @@ public class TestDecommission {
int numNamenodes = 1;
int numDatanodes = 1;
int replicas = 1;
conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY,
DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_DEFAULT);
conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INITIAL_DELAY_KEY, 5);
startCluster(numNamenodes, numDatanodes, conf);
Path file1 = new Path("testDecommission.dat");
Path file1 = new Path("testDecommissionWithNamenodeRestart.dat");
FileSystem fileSys = cluster.getFileSystem();
writeFile(fileSys, file1, replicas);
@ -894,37 +897,26 @@ public class TestDecommission {
String excludedDatanodeName = info[0].getXferAddr();
writeConfigFile(excludeFile, new ArrayList<String>(Arrays.asList(excludedDatanodeName)));
//Add a new datanode to cluster
cluster.startDataNodes(conf, 1, true, null, null, null, null);
numDatanodes+=1;
assertEquals("Number of datanodes should be 2 ", 2, cluster.getDataNodes().size());
//Restart the namenode
cluster.restartNameNode();
DatanodeInfo datanodeInfo = NameNodeAdapter.getDatanode(
cluster.getNamesystem(), excludedDatanodeID);
waitNodeState(datanodeInfo, AdminStates.DECOMMISSIONED);
// Ensure decommissioned datanode is not automatically shutdown
assertEquals("All datanodes must be alive", numDatanodes,
client.datanodeReport(DatanodeReportType.LIVE).length);
// wait for the block to be replicated
int tries = 0;
while (tries++ < 20) {
try {
Thread.sleep(1000);
if (checkFile(fileSys, file1, replicas, datanodeInfo.getXferAddr(),
numDatanodes) == null) {
break;
}
} catch (InterruptedException ie) {
}
}
assertTrue("Checked if block was replicated after decommission, tried "
+ tries + " times.", tries < 20);
cleanupFile(fileSys, file1);
assertTrue("Checked if block was replicated after decommission.",
checkFile(fileSys, file1, replicas, datanodeInfo.getXferAddr(),
numDatanodes) == null);
cleanupFile(fileSys, file1);
// Restart the cluster and ensure recommissioned datanodes
// are allowed to register with the namenode
cluster.shutdown();