[jira] [Created] (MAPREDUCE-6009) Map-only job with new-api runs wrong OutputCommitter when cleanup scheduled in a reduce slot

["Gera Shegalov (JIRA)" <ji...@apache.org>]

Gera Shegalov created MAPREDUCE-6009:
----------------------------------------

             Summary: Map-only job with new-api runs wrong OutputCommitter when cleanup scheduled in a reduce slot
                 Key: MAPREDUCE-6009
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6009
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: client, job submission
    Affects Versions: 1.2.1
            Reporter: Gera Shegalov
            Assignee: Gera Shegalov
            Priority: Blocker


In branch 1 job commit is executed in a JOB_CLEANUP task that may run in either map or reduce slot

in org.apache.hadoop.mapreduce.Job#setUseNewAPI there is a logic setting new-api flag only for reduce-ful jobs.
{code}
    if (numReduces != 0) {
      conf.setBooleanIfUnset("mapred.reducer.new-api",
                             conf.get(oldReduceClass) == null);
      ...
{code}
Therefore, when cleanup runs in a reduce slot, ReduceTask inits using the old API and runs incorrect default OutputCommitter, instead of consulting OutputFormat.




--
This message was sent by Atlassian JIRA
(v6.2#6252)