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https://issues.apache.org/jira/browse/MAPREDUCE-1016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12758109#action_12758109
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Jothi Padmanabhan commented on MAPREDUCE-1016:
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I think storing it in JSON is a good idea too. Nevertheless, I think the best
way for other history consumers/tools to insulate themselves from the
underlying changes/incompatibilities would be to use the JobHistoryParsing
API's. At the least, they will abstract out the underlying storage format.
> Make the format of the Job History be JSON instead of Avro binary
> -----------------------------------------------------------------
>
> Key: MAPREDUCE-1016
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1016
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Reporter: Owen O'Malley
> Assignee: Doug Cutting
> Fix For: 0.21.0, 0.22.0
>
>
> I forgot that one of the features that would be nice is to off load the job
> history display from the JobTracker. That will be a lot easier, if the job
> history is stored in JSON. Therefore, I think we should change the storage
> now to prevent incompatibilities later.
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