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https://issues.apache.org/jira/browse/HDFS-2724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon resolved HDFS-2724.
-------------------------------
Resolution: Fixed
Fix Version/s: HA branch (HDFS-1623)
Hadoop Flags: Reviewed
Committed to branch, thanks Eli.
> NN web UI can throw NPE after startup, before standby state is entered
> ----------------------------------------------------------------------
>
> Key: HDFS-2724
> URL: https://issues.apache.org/jira/browse/HDFS-2724
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, name-node
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Aaron T. Myers
> Assignee: Todd Lipcon
> Fix For: HA branch (HDFS-1623)
>
> Attachments: hdfs-2724.txt
>
>
> There's a brief period of time (a few seconds) after the NN web server has
> been initialized, but before the NN's HA state is initialized. If
> {{dfshealth.jsp}} is hit during this time, a {{NullPointerException}} will be
> thrown.
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