[jira] [Commented] (AMBARI-15235) Display tag for StandBy name node should not be changed to NameNode if there is an active namenode

["Hudson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AMBARI-15235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15173063#comment-15173063 ] 

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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