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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4794) DefaultSpeculator generates error messages on normal shutdown
Date Wed, 14 Nov 2012 01:06:12 GMT
Jason Lowe created MAPREDUCE-4794:
-------------------------------------

             Summary: DefaultSpeculator generates error messages on normal shutdown
                 Key: MAPREDUCE-4794
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4794
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: applicationmaster
    Affects Versions: 2.0.1-alpha, 0.23.3
            Reporter: Jason Lowe


DefaultSpeculator can log the following error message on a normal shutdown of the ApplicationMaster:

{noformat}
2012-11-13 01:35:31,841 ERROR [DefaultSpeculator background processing] org.apache.hadoop.mapreduce.v2.app.speculate.DefaultSpeculator:
Background thread returning, interrupted : java.lang.InterruptedException
{noformat}

and in addition for some reason it logs the corresponding backtrace to stdout.

Like the errors fixed in MAPREDUCE-4741, this error message in the syslog and backtrace on
stdout can be confusing to users as to whether the job really succeeded.

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