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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HDFS-956) Improper synchronization in some FSNamesystem methods
Date Wed, 14 Apr 2010 17:46:53 GMT

     [ https://issues.apache.org/jira/browse/HDFS-956?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon resolved HDFS-956.
------------------------------

    Resolution: Duplicate

HDFS-988 will cover these as well.

> Improper synchronization in some FSNamesystem methods
> -----------------------------------------------------
>
>                 Key: HDFS-956
>                 URL: https://issues.apache.org/jira/browse/HDFS-956
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.21.0, 0.22.0
>            Reporter: Todd Lipcon
>
> There are some methods in FSNamesystem that check isInSafeMode while not synchronized,
and then proceed to perform operations. Thus the actual operations can occur after the NN
has entered safemode, which is no good.

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