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Posted to yarn-issues@hadoop.apache.org by "Eric Badger (JIRA)" <ji...@apache.org> on 2016/04/06 17:58:25 UTC

[jira] [Commented] (YARN-4756) Unnecessary wait in Node Status Updater during reboot

    [ https://issues.apache.org/jira/browse/YARN-4756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15228520#comment-15228520 ] 

Eric Badger commented on YARN-4756:
-----------------------------------

[~kasha], does my explanation make sense? Do you have any other concerns with this patch?

> Unnecessary wait in Node Status Updater during reboot
> -----------------------------------------------------
>
>                 Key: YARN-4756
>                 URL: https://issues.apache.org/jira/browse/YARN-4756
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Eric Badger
>            Assignee: Eric Badger
>         Attachments: YARN-4756.001.patch, YARN-4756.002.patch, YARN-4756.003.patch, YARN-4756.004.patch, YARN-4756.005.patch
>
>
> The startStatusUpdater thread waits for the isStopped variable to be set to true, but it is waiting for the next heartbeat. During a reboot, the next heartbeat will not come and so the thread waits for a timeout. Instead, we should notify the thread to continue so that it can check the isStopped variable and exit without having to wait for a timeout. 



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