RMContainerAllocator counts failed maps towards Reduce ramp up
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Key: MAPREDUCE-3490
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3490
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mr-am, mrv2
Affects Versions: 0.23.0
Reporter: Siddharth Seth
The RMContainerAllocator does not differentiate between failed and successful
maps while calculating whether reduce tasks are ready to launch. Failed tasks
are also counted towards total completed tasks.
Example. 4 failed maps, 10 total maps. Map%complete = 4/14 * 100 instead of
being 0.
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