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

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.0, 3.0.0-alpha1
• Fix Version/s: 2.6.0
• Component/s: client
• Hadoop Flags: Reviewed
• Assignee: Tsuyoshi Ozawa
• Reporter: Zhijie Shen
• Created: 16/Apr/14 22:41
• Updated: 12/May/16 18:29
• Resolved: 09/Aug/14 18:49

Description

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.

Issue Links

• relates to: YARN-1917 Add "waitForApplicationState" interface to YarnClient