Chengwei Wang created MAPREDUCE-7274:
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Summary: Enable to set running task limit when mapreduce job is
running
Key: MAPREDUCE-7274
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7274
Project: Hadoop Map/Reduce
Issue Type: New Feature
Reporter: Chengwei Wang
MRv2 enabled users to control the number of map or reduce tasks running
simultaneously by configuration _mapreduce.job.running.map.limit_ or
_mapreduce.job.running.reduce.limit._ But users can only set limit number
before submitting the job to rm. So, it's meaningful to enable users to set
the limit of running map or reduce __ tasks, which can help users to restrict
resource usage of job and give resources to high-priority job.
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