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https://issues.apache.org/jira/browse/SPARK-19143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16657028#comment-16657028
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Marcelo Vanzin commented on SPARK-19143:
----------------------------------------

I don't think there's been any activity. There was a PR to add a way to send 
commands to a running Spark app, which would be one way of achieving this, but 
it was abandoned.

> API in Spark for distributing new delegation tokens (Improve delegation token 
> handling in secure clusters)
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-19143
>                 URL: https://issues.apache.org/jira/browse/SPARK-19143
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core, YARN
>    Affects Versions: 2.0.2, 2.1.0
>            Reporter: Ruslan Dautkhanov
>            Priority: Major
>
> Spin off from SPARK-14743 and comments chain in [recent comments| 
> https://issues.apache.org/jira/browse/SPARK-5493?focusedCommentId=15802179&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15802179]
>  in SPARK-5493.
> Spark currently doesn't have a way for distribution new delegation tokens. 
> Quoting [~vanzin] from SPARK-5493 
> {quote}
> IIRC Livy doesn't yet support delegation token renewal. Once it reaches the 
> TTL, the session is unusable.
> There might be ways to hack support for that without changes in Spark, but 
> I'd like to see a proper API in Spark for distributing new delegation tokens. 
> I mentioned that in SPARK-14743, but although that bug is closed, that 
> particular feature hasn't been implemented yet.
> {quote}
> Other thoughts?



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