Beckham007 shared an issue with you
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> NMSimulator of sls should catch more Exception
> ----------------------------------------------
>
> Key: YARN-2169
> URL: https://issues.apache.org/jira/browse/YARN-2169
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 2.4.0
> Reporter: Beckham007
> Attachments: YARN-2169.patch
>
>
> In the method middleStep() of NMSimulator , sending heart beat may cause
> InterruptedException or other Exception if the load is heavily. If not
> handler these exceptions, the task of NMSimulator cloud not add to the
> executor queue again. So the NM will lost.
> In my situation, the pool size is 4000, nm size is 2000, and am is 1500. Some
> NMs will lost.
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