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https://issues.apache.org/jira/browse/HDFS-5251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13775926#comment-13775926
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Suresh Srinivas commented on HDFS-5251:
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+1 for the change. I will commit it shortly.
> Race between the initialization of NameNode and the http server
> ---------------------------------------------------------------
>
> Key: HDFS-5251
> URL: https://issues.apache.org/jira/browse/HDFS-5251
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Haohui Mai
> Assignee: Haohui Mai
> Attachments: HDFS-5251.000.patch
>
>
> The constructor of NameNode starts a HTTP server before the FSNameSystem is
> initialized. Currently there is a race where the HTTP server can access the
> uninitialized namesystem variable, throwing a NullPointerException.
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