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https://issues.apache.org/jira/browse/HADOOP-8525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13402243#comment-13402243
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Robert Joseph Evans commented on HADOOP-8525:
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Yes that would make since to update the Writable methods. I remember looking
and they are not really used, but they are still there.
> Provide Improved Traceability for Configuration
> -----------------------------------------------
>
> Key: HADOOP-8525
> URL: https://issues.apache.org/jira/browse/HADOOP-8525
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Robert Joseph Evans
> Assignee: Robert Joseph Evans
> Priority: Trivial
> Attachments: HADOOP-8525.txt
>
>
> Configuration provides basic traceability to see where a config setting came
> from, but once the configuration is written out that information is written
> to a comment in the XML and then lost the next time the configuration is read
> back in. It would really be great to be able to store a complete history of
> where the config came from in the XML, so that it can then be retrieved later
> for debugging.
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