Devaraj K created YARN-164:
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Summary: Race condition in Fair Scheduler
Key: YARN-164
URL: https://issues.apache.org/jira/browse/YARN-164
Project: Hadoop YARN
Issue Type: Bug
Components: scheduler
Affects Versions: 2.0.2-alpha
Reporter: Devaraj K
Assignee: Devaraj K
Priority: Critical
{code:xml}
Thread updateThread = new Thread(new UpdateThread());
updateThread.start();
initialized = true;
{code}
In the above code, making the initialized as true after starting the
UpdateThread.
{code:xml}
private class UpdateThread implements Runnable {
public void run() {
while (initialized) {
try {
Thread.sleep(UPDATE_INTERVAL);
update();
preemptTasksIfNecessary();
} catch (Exception e) {
LOG.error("Exception in fair scheduler UpdateThread", e);
}
}
}
}
{code}
In this run method of UpdateThread, it is checking for the initialized and
exiting if it is not true. Here most of the times initialized is getting true
after exiting the UpdateThread and the thread functionality is missing, due to
that all the submitted applications are hanging without making any progress.
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