[jira] [Created] (MAPREDUCE-6478) Add an option to skip cleanupJob stage or ignore cleanup failure during commitJob().

["Junping Du (JIRA)" <ji...@apache.org>]

Junping Du created MAPREDUCE-6478:
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             Summary: Add an option to skip cleanupJob stage or ignore cleanup failure during commitJob().
                 Key: MAPREDUCE-6478
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6478
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
            Reporter: Junping Du
            Assignee: Junping Du


In some our test cases for MR on public cloud scenario, a very big MR job with hundreds or thousands of reducers cannot finish successfully because of Job Cleanup failures which is caused by different scale/performance impact for File System on the cloud (like AzureFS) which replacing HDFS's deletion for whole directory with REST API calls on deleting each sub-directories recursively. 
That could take much longer time (hours) which is not necessary in public cloud scenario. 
Also, it also more easily to get failed to cleanup in these cases, so some failures of cleanupJob can be ignored in this case. Making whole job finish successfully with side effect of wasting some user spaces make more sense in these cases as user's job is usually comes and goes in public cloud, so have a trade off to tolerant some temporary files exists with get rid of big job re-run is quite cost effective. 
We should allow user to have this option (ignore failure or skip job cleanup stage completely) especially when user know the cleanup failure is not due to HDFS abnormal status but other FS' different performance trade-off.



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