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From "Craig Condit (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (YARN-9571) RM state store purging should be configurable if log aggregation does not terminate
Date Tue, 06 Aug 2019 13:24:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-9571?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Craig Condit resolved YARN-9571.
--------------------------------
    Resolution: Won't Fix

Closing as won't fix since it appears we will revert YARN-4946 instead.

> RM state store purging should be configurable if log aggregation does not terminate
> -----------------------------------------------------------------------------------
>
>                 Key: YARN-9571
>                 URL: https://issues.apache.org/jira/browse/YARN-9571
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 3.2.0
>            Reporter: Craig Condit
>            Assignee: Craig Condit
>            Priority: Major
>         Attachments: YARN-9571.001.patch
>
>
> YARN-4946 introduced logic which prevents applications from being removed from the RM
State Store unless log aggregation has reached a terminal state. However, there are cases
where log aggregation may not always complete or fail cleanly (we've seen instances where
it shows as NOT_STARTED on production clusters), and in this case the state store will continue
to build up large numbers of applications.
> We should make this behavior configurable. I propose to add a new configuration:
> {code:java}
> yarn.resourcemanager.completed-application-ttl-secs
> {code}
> This can be used to force removal of an application if it would otherwise be purged from
the state store if not for log aggregation status. If this configuration is set to a positive
value, it will be used in conjunction with the application finish time to determine whether
or not to purge the app. The app would be removed if the max # of completed applications has
been reached AND either the app has completed more than ttl-secs seconds ago OR the app has
completed log aggregation. For backwards compatibility we can set the default value of this
parameter to zero, which would disable the new logic.



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