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https://issues.apache.org/jira/browse/YARN-8925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16692794#comment-16692794
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Tao Yang commented on YARN-8925:
--------------------------------
Hi, [~cheersyang]
Can we change the log level of updating node attributes in
NodeAttributesManagerImpl#internalUpdateAttributesOnNodes from DEBUG to INFO?
After this patch, This log won't print very much. I think it's necessary to
record the updated node attributes. What do you think about this? Thanks.
> Updating distributed node attributes only when necessary
> --------------------------------------------------------
>
> Key: YARN-8925
> URL: https://issues.apache.org/jira/browse/YARN-8925
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Affects Versions: 3.2.1
> Reporter: Tao Yang
> Assignee: Tao Yang
> Priority: Major
> Labels: performance
> Attachments: YARN-8925.001.patch, YARN-8925.002.patch,
> YARN-8925.003.patch, YARN-8925.004.patch, YARN-8925.005.patch,
> YARN-8925.006.patch, YARN-8925.007.patch, YARN-8925.008.patch
>
>
> Currently if distributed node attributes exist, even though there is no
> change, updating for distributed node attributes will happen in every
> heartbeat between NM and RM. Updating process will hold
> NodeAttributesManagerImpl#writeLock and may have some influence in a large
> cluster. We have found nodes UI of a large cluster is opened slowly and most
> time it's waiting for the lock in NodeAttributesManagerImpl. I think this
> updating should be called only when necessary to enhance the performance of
> related process.
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