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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7094) Document that server-side graceful decom is currently not recommended
Date Tue, 29 Aug 2017 20:23:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16146049#comment-16146049

Junping Du commented on YARN-7094:

Hi [~rkanter], thanks for the patch here. The content of document looks fine but I think it
is better to note that current behavior (decommission immediately when RM HA happens) is a
known issue and will improved in later release. Otherwise, user would have different expectation
and our improvement later will make behavior inconsistent. Thoughts?

> Document that server-side graceful decom is currently not recommended
> ---------------------------------------------------------------------
>                 Key: YARN-7094
>                 URL: https://issues.apache.org/jira/browse/YARN-7094
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: graceful
>    Affects Versions: 3.0.0-beta1
>            Reporter: Robert Kanter
>            Assignee: Robert Kanter
>            Priority: Blocker
>         Attachments: YARN-7094.001.patch
> Server-side NM graceful decom currently does not work correctly when an RM failover occurs
because we don't persist the info in the state store (see YARN-5464).  Given time constraints
for Hadoop 3 beta 1, we've decided to document this limitation and recommend client-side NM
graceful decom in the meantime if you need this functionality (see [this comment|https://issues.apache.org/jira/browse/YARN-5464?focusedCommentId=16126119&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16126119]).
 Once YARN-5464 is done, we can undo this doc change.

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