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Posted to yarn-issues@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2014/12/16 21:13:14 UTC

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

Jason Lowe created YARN-2972:
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             Summary: 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: 2.5.0
            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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