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https://issues.apache.org/jira/browse/HADOOP-8782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13452528#comment-13452528
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Daryn Sharp commented on HADOOP-8782:
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Will this be an incompatible change?
> Make serialization of Delegation Tokens extensible
> --------------------------------------------------
>
> Key: HADOOP-8782
> URL: https://issues.apache.org/jira/browse/HADOOP-8782
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
>
> Delegation tokens use of Writables makes it difficult to extend them with new
> fields. Moving to protobufs as the scheme will make it much more extensible.
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