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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