Peter Bacsko commented on MAPREDUCE-6892:

[~haibochen] I uploaded patch v3 which addresses your comments.

I think there are still some room for improvements, plus I expect checkstyle + 
javadoc warnings which needs to be fixed too.

> Issues with the count of failed/killed tasks in the jhist file
> --------------------------------------------------------------
>                 Key: MAPREDUCE-6892
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6892
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client, jobhistoryserver
>            Reporter: Peter Bacsko
>            Assignee: Peter Bacsko
>         Attachments: MAPREDUCE-6892-001.patch, MAPREDUCE-6892-002.PATCH, 
> MAPREDUCE-6892-003.patch
> Recently we encountered some issues with the value of failed tasks. After 
> parsing the jhist file, {{JobInfo.getFailedMaps()}} returned 0, but actually 
> there were failures. 
> Another minor thing is that you cannot get the number of killed tasks 
> (although this can be calculated).
> The root cause is that {{JobUnsuccessfulCompletionEvent}} contains only the 
> successful map/reduce task counts. Number of failed (or killed) tasks are not 
> stored.

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