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https://issues.apache.org/jira/browse/AMBARI-15235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15173063#comment-15173063
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Hudson commented on AMBARI-15235:
---------------------------------
FAILURE: Integrated in Ambari-branch-2.2 #434 (See
[https://builds.apache.org/job/Ambari-branch-2.2/434/])
AMBARI-15235. Display tag for StandBy name node should not be changed to
(jaimin:
[http://git-wip-us.apache.org/repos/asf?p=ambari.git&a=commit&h=50c61d602b81fa4cc3b75adb578cbd16e9ecfc1a])
* ambari-web/app/mappers/service_metrics_mapper.js
* ambari-web/test/mappers/service_metrics_mapper_test.js
> Display tag for StandBy name node should not be changed to NameNode if there
> is an active namenode
> --------------------------------------------------------------------------------------------------
>
> Key: AMBARI-15235
> URL: https://issues.apache.org/jira/browse/AMBARI-15235
> Project: Ambari
> Issue Type: Bug
> Components: ambari-web
> Affects Versions: 2.2.0
> Reporter: Jaimin D Jetly
> Assignee: Jaimin D Jetly
> Priority: Critical
> Fix For: 2.2.2
>
> Attachments: AMBARI-15235.patch
>
>
> On a large cluster with heavy load on NameNode, sometimes there happens to be
> greater latency for Standby NameNode in responding back its JMX metrics which
> results in timeout for the JMX call dome by ambari-server and no JMX data for
> standby NameNode is received sometimes.
> Thus Standby NameNode in such environment responses sometimes by declaring
> itself standby and sometimes doesn't respond quick enough before timeout
> happens.
> Due to this behavior ambari-web keeps alternating frequently between “standby
> namenode” and “namenode”, even though there is no failover.
> As a fix ambari if detects any one namenode to be active should consider
> other to be standby even though JMX call to standby namenode has timedout.
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