[jira] [Created] (MAPREDUCE-6762) ControlledJob#toString failed with NPE when job status is not successfully updated

["Weiwei Yang (JIRA)" <ji...@apache.org>]

Weiwei Yang created MAPREDUCE-6762:
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             Summary: ControlledJob#toString failed with NPE when job status is not successfully updated
                 Key: MAPREDUCE-6762
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6762
             Project: Hadoop Map/Reduce
          Issue Type: Bug
    Affects Versions: 2.7.2
            Reporter: Weiwei Yang


This issue was found from a cluster where Pig query occasionally failed on NPE. Pig uses JobControl API to track MR job status, but sometimes Job History Server failed to flush job meta files to HDFS which caused the status update failed. Then we get NPE in {{org.apache.hadoop.mapreduce.Job.getJobName}}. The result of this situation is quite confusing: Pig query failed, job history is missing, but the job status on Yarn is succeed.



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