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

["MinJi Kim (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5568?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

MinJi Kim updated MAPREDUCE-5568:
---------------------------------
    Affects Version/s: 2.4.1
                       2.5.1
               Status: Patch Available  (was: Open)

When constructing a job report for completed jobs, history server should check for the case where reduce/map job count = 0.

> JHS returns 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
>    Affects Versions: 2.5.1, 2.4.1
>            Reporter: Jian He
>            Assignee: MinJi Kim
>
> 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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