[
https://issues.apache.org/jira/browse/YARN-4041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14681217#comment-14681217
]
Rohith Sharma K S commented on YARN-4041:
-----------------------------------------
Recently in test cluster faced the similar issue i.e around 60 apps were
running. On RM switch, each applications took around 8 minutes to renew
delegation token which is 8 min* 60 apps = 480minutes for recovery. YARN-3639
is the issue raised for the same.
> Slow delegation token renewal can severely prolong RM recovery
> --------------------------------------------------------------
>
> Key: YARN-4041
> URL: https://issues.apache.org/jira/browse/YARN-4041
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.6.0
> Reporter: Jason Lowe
> Assignee: Sunil G
>
> When the RM does a work-preserving restart it synchronously tries to renew
> delegation tokens for every active application. If a token server happens to
> be down or is running slow and a lot of the active apps were using tokens
> from that server then it can have a huge impact on the time it takes the RM
> to process the restart.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
