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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4696) EntityGroupFSTimelineStore to work in the absence of an RM
Date Mon, 07 Mar 2016 18:25:40 GMT

    [ https://issues.apache.org/jira/browse/YARN-4696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15183401#comment-15183401
] 

Steve Loughran commented on YARN-4696:
--------------------------------------

ignore the comment about numbers for now, something publish-side that I need to analyse more

> EntityGroupFSTimelineStore to work in the absence of an RM
> ----------------------------------------------------------
>
>                 Key: YARN-4696
>                 URL: https://issues.apache.org/jira/browse/YARN-4696
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: 2.8.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>         Attachments: YARN-4696-001.patch, YARN-4696-002.patch, YARN-4696-003.patch, YARN-4696-005.patch,
YARN-4696-006.patch, YARN-4696-007.patch, YARN-4696-008.patch, YARN-4696-009.patch, YARN-4696-010.patch,
YARN-4696-012.patch
>
>
> {{EntityGroupFSTimelineStore}} now depends on an RM being up and running; the configuration
pointing to it. This is a new change, and impacts testing where you have historically been
able to test without an RM running.
> The sole purpose of the probe is to automatically determine if an app is running; it
falls back to "unknown" if not. If the RM connection was optional, the "unknown" codepath
could be called directly, relying on age of file as a metric of completion
> Options
> # add a flag to disable RM connect
> # skip automatically if RM not defined/set to 0.0.0.0
> # disable retries on yarn client IPC; if it fails, tag app as unknown.



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