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https://issues.apache.org/jira/browse/HDFS-7214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14597916#comment-14597916
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Siqi Li commented on HDFS-7214:
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Sure, I will add it to the webUI based on the existing jmx results

> Display the time when NN became active on the webUI
> ---------------------------------------------------
>
>                 Key: HDFS-7214
>                 URL: https://issues.apache.org/jira/browse/HDFS-7214
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Siqi Li
>            Assignee: Siqi Li
>              Labels: BB2015-05-TBR
>         Attachments: HDFS-7214.v1.patch, HDFS-7214.v2.patch, 
> HDFS-7214.v3.patch, HDFS-7214.v4.patch
>
>
> The currently NN webUI displayed JVM start up. It will be useful to show when 
> NN became active. 



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