JT should kill running maps when all the reducers have completed
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Key: MAPREDUCE-1060
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1060
Project: Hadoop Map/Reduce
Issue Type: Improvement
Reporter: Jothi Padmanabhan
We have seen some situations where maps are still running when all the reducers
have completed. This could happen because of lost TT's, interplay of
speculative tasks with bad TT's etc. If the maps take a long time to run, it
unnecessarily delays the job completion time, as this map output is not
required anyways. The JT should possibly kill running maps when all the
reducers have completed.
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