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Posted to yarn-dev@hadoop.apache.org by "Zhijie Shen (JIRA)" <ji...@apache.org> on 2014/04/17 00:42:16 UTC

[jira] [Created] (YARN-1954) Add waitFor to AMRMClient(Async)

Zhijie Shen created YARN-1954:
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             Summary: Add waitFor to AMRMClient(Async)
                 Key: YARN-1954
                 URL: https://issues.apache.org/jira/browse/YARN-1954
             Project: Hadoop YARN
          Issue Type: New Feature
          Components: client
    Affects Versions: 2.4.0, 3.0.0
            Reporter: Zhijie Shen


Recently, I saw some use cases of AMRMClient(Async). The painful thing is that the main non-daemon thread has to sit in a dummy loop to prevent AM process exiting before all the tasks are done, while unregistration is triggered on a separate another daemon thread by callback methods (in particular when using AMRMClientAsync). IMHO, it should be beneficial to add a waitFor method to AMRMClient(Async) to block the AM until unregistration or user supplied check point, such that users don't need to write the loop themselves.



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