Tarun Parimi created YARN-10240:
-----------------------------------
Summary: Prevent Fatal CancelledException in TimelineV2Client when
stopping
Key: YARN-10240
URL: https://issues.apache.org/jira/browse/YARN-10240
Project: Hadoop YARN
Issue Type: Bug
Components: ATSv2
Reporter: Tarun Parimi
When the timeline client is stopped, it will cancel all sync EntityHolders
after waiting for a drain timeout.
{code:java}
// if some entities were not drained then we need interrupt
// the threads which had put sync EntityHolders to the queue.
EntitiesHolder nextEntityInTheQueue = null;
while ((nextEntityInTheQueue =
timelineEntityQueue.poll()) != null) {
nextEntityInTheQueue.cancel(true);
}
{code}
We only handle interrupted exception here.
{code:java}
if (sync) {
// In sync call we need to wait till its published and if any error then
// throw it back
try {
entitiesHolder.get();
} catch (ExecutionException e) {
throw new YarnException("Failed while publishing entity",
e.getCause());
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new YarnException("Interrupted while publishing entity", e);
}
}
{code}
But calling nextEntityInTheQueue.cancel(true) will result in
entitiesHolder.get() throwing a CancelledException which is not handled. This
can result in FATAL error in NM. We need to prevent this.
{code:java}
FATAL event.AsyncDispatcher (AsyncDispatcher.java:dispatch(203)) - Error in
dispatcher thread
java.util.concurrent.CancellationException
at java.util.concurrent.FutureTask.report(FutureTask.java:121)
at java.util.concurrent.FutureTask.get(FutureTask.java:192)
at
org.apache.hadoop.yarn.client.api.impl.TimelineV2ClientImpl$TimelineEntityDispatcher.dispatchEntities(TimelineV2ClientImpl.java:545)
at
org.apache.hadoop.yarn.client.api.impl.TimelineV2ClientImpl.putEntities(TimelineV2ClientImpl.java:149)
at
org.apache.hadoop.yarn.server.nodemanager.timelineservice.NMTimelinePublisher.putEntity(NMTimelinePublisher.java:348)
{code}
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