jiayuhan-it created MAPREDUCE-7017:
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Summary: Too many times of meaningless invocation in
TaskAttemptImpl#resolveHosts
Key: MAPREDUCE-7017
URL: https://issues.apache.org/jira/browse/MAPREDUCE-7017
Project: Hadoop Map/Reduce
Issue Type: Improvement
Components: mr-am
Affects Versions: 3.0.0-alpha4
Reporter: jiayuhan-it
In MRAppMaster each TaskAttempt call resolveHosts function too many times
for getting dataLocalHosts. When a job has a lot of tasks or the machine
configures unreasonab, it will waste a lot of time.
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