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https://issues.apache.org/jira/browse/YARN-668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14139731#comment-14139731
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Vinod Kumar Vavilapalli commented on YARN-668:
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One more thing. Let's version each of the token separately and validate the
versions on the NodeManager during startContainer() to catch incompatible
changes. The Token is redesigned anyways, so we can start with version 0.
> TokenIdentifier serialization should consider Unknown fields
> ------------------------------------------------------------
>
> Key: YARN-668
> URL: https://issues.apache.org/jira/browse/YARN-668
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Siddharth Seth
> Assignee: Vinod Kumar Vavilapalli
> Priority: Blocker
> Attachments: YARN-668-demo.patch
>
>
> This would allow changing of the TokenIdentifier between versions. The
> current serialization is Writable. A simple way to achieve this would be to
> have a Proto object as the payload for TokenIdentifiers, instead of
> individual fields.
> TokenIdentifier continues to implement Writable to work with the RPC layer -
> but the payload itself is serialized using PB.
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