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https://issues.apache.org/jira/browse/YARN-582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13644845#comment-13644845
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Bikas Saha commented on YARN-582:
---------------------------------
The RMStore stores applications and their attempts. And it is used to restore
applications and their attempts from the data that they had earlier stored.
This allows the recovery code to follow existing code paths to the fullest
extent and prevent recovery logic from diverging from the "normal" code path.
So I would like to avoid storing tokens separately from apps/attempts and then
have to manage their relationship later on during recovery. As far as saving
appToken and clientToken, I agree it would be nice to have a single object
store all attempt tokens in one place. At AppSubmitContext does that for app
tokens.
> Restore appToken and clientToken for app attempt after RM restart
> -----------------------------------------------------------------
>
> Key: YARN-582
> URL: https://issues.apache.org/jira/browse/YARN-582
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Bikas Saha
> Assignee: Jian He
> Attachments: YARN-582.1.patch
>
>
> These need to be saved and restored on a per app attempt basis. This is
> required only when work preserving restart is implemented for secure
> clusters. In non-preserving restart app attempts are killed and so this does
> not matter.
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