[jira] [Created] (MAPREDUCE-5568) JHS return invalid string for reducer completion percentage if AM restarts with 0 reducer.

["Jian He (JIRA)" <ji...@apache.org>]

Jian He created MAPREDUCE-5568:
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             Summary: JHS return invalid string for reducer completion percentage if AM restarts with 0 reducer.
                 Key: MAPREDUCE-5568
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5568
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Jian He


JobCLient shows like:
{code}
13/10/05 16:26:09 INFO mapreduce.Job:  map 100% reduce NaN%
13/10/05 16:26:09 INFO mapreduce.Job: Job job_1381015536254_0001 completed successfully
13/10/05 16:26:09 INFO mapreduce.Job: Counters: 26
	File System Counters
		FILE: Number of bytes read=0
		FILE: Number of bytes written=76741
		FILE: Number of read operations=0
		FILE: Number of large read operations=0
		FILE: Number of write operations=0
		HDFS: Number of bytes read=48
		HDFS: Number of bytes written=0
		HDFS: Number of read operations=1
		HDFS: Number of large read operations=0
		HDFS: Number of write operations=0
{code}
With mapped job -status command, it shows:
{code}
Uber job : false
Number of maps: 1
Number of reduces: 0
map() completion: 1.0
reduce() completion: NaN
Job state: SUCCEEDED
retired: false
reason for failure:
{code}



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