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https://issues.apache.org/jira/browse/HELIX-613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14996059#comment-14996059
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ASF GitHub Bot commented on HELIX-613:
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Github user asfgit closed the pull request at:
https://github.com/apache/helix/pull/38
> TaskStateModel generates significant amount of threads and causing thread
> leaking problem
> -----------------------------------------------------------------------------------------
>
> Key: HELIX-613
> URL: https://issues.apache.org/jira/browse/HELIX-613
> Project: Apache Helix
> Issue Type: Bug
> Affects Versions: 0.6.x
> Reporter: Lei Xia
> Assignee: Lei Xia
>
> Current TaskStateModel creates a thread-pool containing 40 threads for each
> instance of TaskStateModel, thus it creates 40 threads for each task
> (partition). Since Job are dynamic resources, the thread pool is not properly
> shutdown when task has completed (or timeouted, failed, etc). We saw ~10000
> threads were created in our production machines.
> Also, the timeout timer in each TaskStateModel is not properly cancelled even
> though the task has completed or failed. The timer consume a thread even
> though it is not used anymore.
> The proposed solution is to use a shared thread pool for all TaskStateModel
> in a single TaskStateModelFactory for all regular tasks and timeout task.
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