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https://issues.apache.org/jira/browse/YARN-4697?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Haibo Chen updated YARN-4697:
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    Attachment: yarn4697.001.patch

> NM aggregation thread pool is not bound by limits
> -------------------------------------------------
>
>                 Key: YARN-4697
>                 URL: https://issues.apache.org/jira/browse/YARN-4697
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>            Reporter: Haibo Chen
>            Assignee: Haibo Chen
>         Attachments: yarn4697.001.patch
>
>
> In the LogAggregationService.java we create a threadpool to upload logs from 
> the nodemanager to HDFS if log aggregation is turned on. This is a cached 
> threadpool which based on the javadoc is an ulimited pool of threads.
> In the case that we have had a problem with log aggregation this could cause 
> a problem on restart. The number of threads created at that point could be 
> huge and will put a large load on the NameNode and in worse case could even 
> bring it down due to file descriptor issues.



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