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https://issues.apache.org/jira/browse/YARN-8925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16725717#comment-16725717
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Weiwei Yang commented on YARN-8925:
-----------------------------------
Hi [~Tao Yang]
Today I applied the patch to a v3.2 cluster. I use configurable based node
attributes provider.
{code}
<property>
<name>yarn.node-attribute.fs-store.root-dir</name>
<value>/home/wwei/hadoop-3.2.0/hadoop-data/yarn/nodeattributes</value>
</property>
<property>
<name>yarn.nodemanager.node-attributes.provider</name>
<value>config</value>
</property>
<property>
<name>yarn.nodemanager.node-attributes.provider.configured-node-attributes</name>
<value>osType,STRING,redhat:osVersion,STRING,2.8</value>
</property>
<property>
<name>yarn.nodemanager.node-attributes.resync-interval-ms</name>
<value>1000</value>
</property>
{code}
when I update the node attribute value of \{{osVersion}} from 2.8 to 2.9. It
was not updated to RM. I checked via
[http://RM:8088/ws/v1/cluster/nodes.|http://rm:8088/ws/v1/cluster/nodes.] Could
u pls take a look?
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,
> YARN-8925.009.patch, YARN-8925.010.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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