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Posted to hdfs-issues@hadoop.apache.org by "Kihwal Lee (JIRA)" <ji...@apache.org> on 2014/09/12 18:29:34 UTC

[jira] [Assigned] (HDFS-7046) HA NN can NPE upon transition to active

     [ https://issues.apache.org/jira/browse/HDFS-7046?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kihwal Lee reassigned HDFS-7046:
--------------------------------

    Assignee: Kihwal Lee

> HA NN can NPE upon transition to active
> ---------------------------------------
>
>                 Key: HDFS-7046
>                 URL: https://issues.apache.org/jira/browse/HDFS-7046
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 3.0.0, 2.5.0
>            Reporter: Daryn Sharp
>            Assignee: Kihwal Lee
>            Priority: Critical
>         Attachments: HDFS-7046.patch, HDFS-7046_test_reproduce.patch
>
>
> While processing edits, the NN may decide after adjusting block totals to leave safe mode - in the middle of the edit.  Going active starts the secret manager which generates a new secret key, which in turn generates an edit, which NPEs because the edit log is not open.
> # Transitions should _not_ occur in the middle of an edit.
> # The edit log appears to claim it's open for write when the stream isn't even open



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