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https://issues.apache.org/jira/browse/YARN-8729?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tao Yang updated YARN-8729:
---------------------------
Attachment: YARN-8729.001.patch
> Node status updater thread could be lost after it restarted
> -----------------------------------------------------------
>
> Key: YARN-8729
> URL: https://issues.apache.org/jira/browse/YARN-8729
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Affects Versions: 3.2.0
> Reporter: Tao Yang
> Assignee: Tao Yang
> Priority: Critical
> Attachments: YARN-8729.001.patch, YARN-8729.001.patch
>
>
> Today I found a lost NM whose node status updater thread was not exist after
> this thread restarted. In
> {{NodeStatusUpdaterImpl#rebootNodeStatusUpdaterAndRegisterWithRM}}, isStopped
> flag is not updated to be false before executing {{statusUpdater.start()}},
> so that if the thread is immediately started and found isStopped==true, it
> will exit without any log.
> Key codes in
> {{NodeStatusUpdaterImpl#rebootNodeStatusUpdaterAndRegisterWithRM}}:
> {code:java}
> statusUpdater.join();
> registerWithRM();
> statusUpdater = new Thread(statusUpdaterRunnable, "Node Status Updater");
> statusUpdater.start();
> this.isStopped = false; //this line should be moved before
> statusUpdater.start();
> LOG.info("NodeStatusUpdater thread is reRegistered and restarted");
> {code}
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