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From "Adam Antal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-9629) Support configurable MIN_LOG_ROLLING_INTERVAL
Date Wed, 03 Jul 2019 09:10:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-9629?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16877668#comment-16877668
] 

Adam Antal commented on YARN-9629:
----------------------------------

Thanks for the reply [~sunilg].

Agreed on #2. Removed the plus information from the debug mode, and moved the "rollingMonitorInterval
is set as ... " part to {{serviceInit}} where the actual setting is happening. Also reorganised
a bit using the LOG interface provided String formatting.

> Support configurable MIN_LOG_ROLLING_INTERVAL
> ---------------------------------------------
>
>                 Key: YARN-9629
>                 URL: https://issues.apache.org/jira/browse/YARN-9629
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: log-aggregation, nodemanager, yarn
>    Affects Versions: 3.2.0
>            Reporter: Adam Antal
>            Assignee: Adam Antal
>            Priority: Minor
>         Attachments: YARN-9629.001.patch, YARN-9629.002.patch, YARN-9629.003.patch, YARN-9629.004.patch,
YARN-9629.005.patch
>
>
> One of the log-aggregation parameter, the minimum valid value for {{yarn.nodemanager.log-aggregation.roll-monitoring-interval-seconds}}
is MIN_LOG_ROLLING_INTERVAL - it has been hardcoded since its addition in YARN-2583. 
> It has been empirically set as 1 hour, as lower values would too frequently put the NodeManagers
under pressure. For bigger clusters that is indeed a valid limitation, but for smaller clusters
it makes sense and a valid customer usecase to use lower values, even like not so lower 30
mins. At this point this can only be achieved by setting {{yarn.nodemanager.log-aggregation.debug-enabled}},
which I believe should be kept as debug purposes.
> I'm suggesting to make this min configurable, although a warning should be logged in
the NodeManager startup when this value is lower than 1 hour.



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