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HDFS-10271. Extra bytes are getting released from reservedSpace for append (Contributed by Brahma Reddy Battula) 

(cherry picked from commit a9a607f8fc)
(cherry picked from commit 04621537c9)
This commit is contained in:
Vinayakumar B 2016-04-12 11:22:58 +05:30
parent e2b8bdbe0a
commit b804b20843
2 changed files with 64 additions and 3 deletions
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7
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/FsDatasetImpl.java
View File

@ -1162,7 +1162,8 @@ private synchronized ReplicaBeingWritten append(String bpid,
// construct a RBW replica with the new GS
File blkfile = replicaInfo.getBlockFile();
FsVolumeImpl v = (FsVolumeImpl)replicaInfo.getVolume();
if (v.getAvailable() < estimateBlockLen - replicaInfo.getNumBytes()) {
long bytesReserved = estimateBlockLen - replicaInfo.getNumBytes();
if (v.getAvailable() < bytesReserved) {
throw new DiskOutOfSpaceException("Insufficient space for appending to "
+ replicaInfo);
}
@ -1170,7 +1171,7 @@ private synchronized ReplicaBeingWritten append(String bpid,
File oldmeta = replicaInfo.getMetaFile();
ReplicaBeingWritten newReplicaInfo = new ReplicaBeingWritten(
replicaInfo.getBlockId(), replicaInfo.getNumBytes(), newGS,
v, newBlkFile.getParentFile(), Thread.currentThread(), estimateBlockLen);
v, newBlkFile.getParentFile(), Thread.currentThread(), bytesReserved);
File newmeta = newReplicaInfo.getMetaFile();
// rename meta file to rbw directory
@ -1206,7 +1207,7 @@ private synchronized ReplicaBeingWritten append(String bpid,
// Replace finalized replica by a RBW replica in replicas map
volumeMap.add(bpid, newReplicaInfo);
v.reserveSpaceForReplica(estimateBlockLen - replicaInfo.getNumBytes());
v.reserveSpaceForReplica(bytesReserved);
return newReplicaInfo;
}

60
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestSpaceReservation.java
View File

@ -572,4 +572,64 @@ public int getNumFailures() {
return numFailures;
}
}
@Test(timeout = 30000)
public void testReservedSpaceForAppend() throws Exception {
final short replication = 3;
startCluster(BLOCK_SIZE, replication, -1);
final String methodName = GenericTestUtils.getMethodName();
final Path file = new Path("/" + methodName + ".01.dat");
// Write 1 byte to the file and kill the writer.
FSDataOutputStream os = fs.create(file, replication);
os.write(new byte[1024]);
os.close();
final Path file2 = new Path("/" + methodName + ".02.dat");
// Write 1 byte to the file and keep it open.
FSDataOutputStream os2 = fs.create(file2, replication);
os2.write(new byte[1]);
os2.hflush();
int expectedFile2Reserved = BLOCK_SIZE - 1;
checkReservedSpace(expectedFile2Reserved);
// append one byte and verify reservedspace before and after closing
os = fs.append(file);
os.write(new byte[1]);
os.hflush();
int expectedFile1Reserved = BLOCK_SIZE - 1025;
checkReservedSpace(expectedFile2Reserved + expectedFile1Reserved);
os.close();
checkReservedSpace(expectedFile2Reserved);
// append one byte and verify reservedspace before and after abort
os = fs.append(file);
os.write(new byte[1]);
os.hflush();
expectedFile1Reserved--;
checkReservedSpace(expectedFile2Reserved + expectedFile1Reserved);
DFSTestUtil.abortStream(((DFSOutputStream) os.getWrappedStream()));
checkReservedSpace(expectedFile2Reserved);
}
private void checkReservedSpace(final long expectedReserved) throws TimeoutException,
InterruptedException, IOException {
for (final DataNode dn : cluster.getDataNodes()) {
try (FsDatasetSpi.FsVolumeReferences volumes = dn.getFSDataset()
.getFsVolumeReferences()) {
final FsVolumeImpl volume = (FsVolumeImpl) volumes.get(0);
GenericTestUtils.waitFor(new Supplier<Boolean>() {
@Override
public Boolean get() {
LOG.info(
"dn " + dn.getDisplayName() + " space : " + volume
.getReservedForReplicas() + ", Expected ReservedSpace :"
+ expectedReserved);
return (volume.getReservedForReplicas() == expectedReserved);
}
}, 100, 3000);
}
}
}
}