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HDFS-8391. NN should consider current EC tasks handling count from DN while assigning new tasks. Contributed by Uma Maheswara Rao G.

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Uma Maheswara Rao G 2015-05-14 11:27:48 +05:30 committed by Zhe Zhang
parent bba15e06d2
commit c99c337928
3 changed files with 23 additions and 3 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES-HDFS-EC-7285.txt
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@ -212,3 +212,6 @@
HDFS-8364. Erasure coding: fix some minor bugs in EC CLI
(Walter Su via vinayakumarb)
HDFS-8391. NN should consider current EC tasks handling count from DN while
assigning new tasks. (umamahesh)

19
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
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@ -1910,6 +1910,21 @@ int getXmitsInProgress() {
return xmitsInProgress.get();
}
/**
* Increments the xmitsInProgress count. xmitsInProgress count represents the
* number of data replication/reconstruction tasks running currently.
*/
public void incrementXmitsInProgress() {
xmitsInProgress.getAndIncrement();
}
/**
* Decrements the xmitsInProgress count
*/
public void decrementXmitsInProgress() {
xmitsInProgress.getAndDecrement();
}
private void reportBadBlock(final BPOfferService bpos,
final ExtendedBlock block, final String msg) {
FsVolumeSpi volume = getFSDataset().getVolume(block);
@ -2128,7 +2143,7 @@ private class DataTransfer implements Runnable {
*/
@Override
public void run() {
xmitsInProgress.getAndIncrement();
incrementXmitsInProgress();
Socket sock = null;
DataOutputStream out = null;
DataInputStream in = null;
@ -2207,7 +2222,7 @@ public void run() {
// check if there are any disk problem
checkDiskErrorAsync();
} finally {
xmitsInProgress.getAndDecrement();
decrementXmitsInProgress();
IOUtils.closeStream(blockSender);
IOUtils.closeStream(out);
IOUtils.closeStream(in);

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/erasurecode/ErasureCodingWorker.java
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@ -312,6 +312,7 @@ private long getBlockLen(ExtendedBlock blockGroup, int i) {
@Override
public void run() {
datanode.incrementXmitsInProgress();
try {
// Store the indices of successfully read source
// This will be updated after doing real read.
@ -397,8 +398,9 @@ public void run() {
// Currently we don't check the acks for packets, this is similar as
// block replication.
} catch (Throwable e) {
LOG.warn("Failed to recover striped block: " + blockGroup);
LOG.warn("Failed to recover striped block: " + blockGroup, e);
} finally {
datanode.decrementXmitsInProgress();
// close block readers
for (StripedReader stripedReader : stripedReaders) {
closeBlockReader(stripedReader.blockReader);