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https://issues.apache.org/jira/browse/HADOOP-4191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12673147#action_12673147
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Amareshwari Sriramadasu commented on HADOOP-4191:
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patch looks fine

> Add a testcase for jobhistory
> -----------------------------
>
>                 Key: HADOOP-4191
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4191
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred, test
>            Reporter: Amar Kamat
>            Assignee: Ravi Gummadi
>         Attachments: HADOOP-4191.patch, HADOOP-4191.v2.patch, 
> HADOOP-4191.v3.patch
>
>
> Changes in job history might break the history parser which in turn might 
> break some features like jobtracker-recovery, history-viewer etc. There 
> should be a testcase that catches these incompatible changes early and 
> informs about the expected change.

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