Siddharth Ahuja created YARN-10856:
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Summary: Prevent ATS v2 health check REST API call of ATS service
itself is disabled.
Key: YARN-10856
URL: https://issues.apache.org/jira/browse/YARN-10856
Project: Hadoop YARN
Issue Type: Improvement
Components: yarn-ui-v2
Affects Versions: 3.3.1
Reporter: Siddharth Ahuja
Currently, even if {{yarn.timeline-service.enabled}} is disabled, the UI2 code
still goes ahead and performs timeline health check REST API calls, see [1],
[2] and [3].
This is un-necessary and can cause slowness issues with RM UI2 page loading if
a firewall is dropping packets on the ATS v2 port (as it is not meant to be
available e.g. 8188/8190) in the background and the timeout is not yet hit.
This ATSv2 health check REST API call is redundant and should be removed if the
service itself is disabled.
[1]
https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/src/main/webapp/app/adapters/timeline-health.js
[2]
https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/src/main/webapp/app/routes/application.js#L34
[3]
https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/src/main/webapp/app/routes/yarn-app/logs.js#L40
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