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From "Jonathan Eagles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4183) Enabling generic application history forces every job to get a timeline service delegation token
Date Fri, 12 Feb 2016 22:36:18 GMT

    [ https://issues.apache.org/jira/browse/YARN-4183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15145447#comment-15145447
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Jonathan Eagles commented on YARN-4183:
---------------------------------------

Took a look at the patch. The end result is that the issue described by this JIRA not addressed,
but only better documented. I will try this suggestion out to see if i works in practice since
I don't see any that anyone has tried this out yet and proven it to work. This will certainly
put a burden on users that care about this use case working correctly. If I am the only that
needs this feature at this time, this is probably acceptable.

> Enabling generic application history forces every job to get a timeline service delegation
token
> ------------------------------------------------------------------------------------------------
>
>                 Key: YARN-4183
>                 URL: https://issues.apache.org/jira/browse/YARN-4183
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.7.1
>            Reporter: Mit Desai
>            Assignee: Naganarasimha G R
>         Attachments: YARN-4183.1.patch, YARN-4183.v1.001.patch, YARN-4183.v1.002.patch
>
>
> When enabling just the Generic History Server and not the timeline server, the system
metrics publisher will not publish the events to the timeline store as it checks if the timeline
server and system metrics publisher are enabled before creating a timeline client.
> To make it work, if the timeline service flag is turned on, it will force every yarn
application to get a delegation token.
> Instead of checking if timeline service is enabled, we should be checking if application
history server is enabled.



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