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MAPREDUCE-3809. Ensure that there is no needless sleep in Task at the end of the task. Contributed by Siddharth Seth.

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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1241282 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Arun Murthy 2012-02-07 00:13:40 +00:00
parent 08479378c2
commit 75d2d6185e
2 changed files with 17 additions and 8 deletions
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3
hadoop-mapreduce-project/CHANGES.txt
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@ -727,6 +727,9 @@ Release 0.23.1 - Unreleased
MAPREDUCE-3354. Changed scripts so that jobhistory server is started by
bin/mapred instead of bin/yarn. (Jonathan Eagles via acmurthy)
MAPREDUCE-3809. Ensure that there is no needless sleep in Task at the end
of the task. (sseth via acmurthy)
Release 0.23.0 - 2011-11-01
INCOMPATIBLE CHANGES

22
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/Task.java
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@ -656,14 +656,13 @@ public void run() {
try {
boolean taskFound = true; // whether TT knows about this task
// sleep for a bit
try {
Thread.sleep(PROGRESS_INTERVAL);
}
catch (InterruptedException e) {
if (LOG.isDebugEnabled()) {
LOG.debug(getTaskID() + " Progress/ping thread exiting " +
"since it got interrupted");
synchronized(lock) {
if (taskDone.get()) {
break;
}
lock.wait(PROGRESS_INTERVAL);
}
if (taskDone.get()) {
break;
}
@ -721,7 +720,14 @@ public void startCommunicationThread() {
}
public void stopCommunicationThread() throws InterruptedException {
if (pingThread != null) {
synchronized (lock) {
// Intent of the lock is to not send an interupt in the middle of an
// umbilical.ping or umbilical.statusUpdate
synchronized(lock) {
//Interrupt if sleeping. Otherwise wait for the RPC call to return.
lock.notify();
}
synchronized (lock) {
while (!done) {
lock.wait();
}