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Posted to yarn-issues@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2014/12/16 21:14:15 UTC

[jira] [Updated] (YARN-2972) DelegationTokenRenewer thread pool never expands

     [ https://issues.apache.org/jira/browse/YARN-2972?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jason Lowe updated YARN-2972:
-----------------------------
    Affects Version/s:     (was: 2.5.0)
                       2.3.0

> DelegationTokenRenewer thread pool never expands
> ------------------------------------------------
>
>                 Key: YARN-2972
>                 URL: https://issues.apache.org/jira/browse/YARN-2972
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.3.0
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>
> DelegationTokenRenewer uses a thread pool to manage token renewals.  The number of threads is configurable, but unfortunately the pool never expands beyond the hardcoded initial 5 threads because we are using an unbounded LinkedBlockingQueue.  ThreadPoolExecutor only grows the thread pool beyond the core size when the specified queue is full.



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