[jira] [Assigned] (HDFS-2724) NN web UI can throw NPE after startup, before standby state is entered

["Todd Lipcon (Assigned) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-2724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Lipcon reassigned HDFS-2724:
---------------------------------

    Assignee: Todd Lipcon  (was: Eli Collins)
    
> 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
>
> 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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