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Posted to mapreduce-issues@hadoop.apache.org by "jiayuhan-it (JIRA)" <ji...@apache.org> on 2017/12/04 08:14:00 UTC

[jira] [Created] (MAPREDUCE-7017) Too many times of meaningless invocation in TaskAttemptImpl#resolveHosts

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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