Details
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Type:
Bug
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Status: Closed
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Priority:
Blocker
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Resolution: Fixed
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Affects Version/s: 0.23.0, 2.0.0-alpha
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Fix Version/s: 0.23.0
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Component/s: applicationmaster, mrv2
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Labels:None
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Target Version/s:
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Hadoop Flags:Reviewed
Description
There appears to be a race condition in the MR App Master in relation to preempting reducers to let a mapper run. In the particular case that I have been debugging a reducer was selected for preemption that did not have a container assigned to it yet. When the container became available that reduce started running and the previous TA_KILL event appears to have been ignored.