Tsuyoshi OZAWA created MAPREDUCE-4865:
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Summary: Launching node-level combiner the end stage of MapTask
Key: MAPREDUCE-4865
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4865
Project: Hadoop Map/Reduce
Issue Type: Sub-task
Components: tasktracker
Affects Versions: 3.0.0
Reporter: Tsuyoshi OZAWA
Assignee: Tsuyoshi OZAWA
MapTask needs to start node-level aggregation against local outputs at the end
stage of MapTask after calling getAggregationTargets().
This feature is implemented with Merger and CombinerRunner.
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