Tao Yang created YARN-8729:
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Summary: 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
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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