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From "Varun Saxena (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6342) Issues in async API of TimelineClient
Date Tue, 21 Mar 2017 20:50:41 GMT

    [ https://issues.apache.org/jira/browse/YARN-6342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15935313#comment-15935313

Varun Saxena commented on YARN-6342:

[~haibochen], correct. FutureTask#run won't throw any exception.

How about fixing the other issue which I pointed out?
While stopping i.e. in NMTimelinePublisher#serviceStop we are not explicitly stopping app
related timeline clients which would mean that some of the entities lying around in the queue
may not be written...

> Issues in async API of TimelineClient
> -------------------------------------
>                 Key: YARN-6342
>                 URL: https://issues.apache.org/jira/browse/YARN-6342
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Jian He
>            Assignee: Haibo Chen
>              Labels: yarn-5355-merge-blocker
> Found these with [~rohithsharma] while browsing the code
> - In stop: it calls shutdownNow which doens't wait for pending tasks, should it use shutdown
instead ?
> {code}
>     public void stop() {
>       LOG.info("Stopping TimelineClient.");
>       executor.shutdownNow();
>       try {
>         executor.awaitTermination(DRAIN_TIME_PERIOD, TimeUnit.MILLISECONDS);
>       } catch (InterruptedException e) {
> {code}
> - In TimelineClientImpl#createRunnable:
> If any exception happens when publish one entity (publishWithoutBlockingOnQueue), the
thread exists. I think it should try best effort to continue publishing the timeline entities,
one failure should not cause all followup entities not published.

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