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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-3048) Small race in BlockManager#close
Date Wed, 15 Aug 2012 22:46:38 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3048?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eli Collins updated HDFS-3048:
------------------------------

          Resolution: Fixed
       Fix Version/s: 2.2.0-alpha
    Target Version/s:   (was: 2.2.0-alpha)
        Hadoop Flags: Reviewed
              Status: Resolved  (was: Patch Available)

I've committed this to trunk and merged to branch-2. Thanks Andy!
                
> Small race in BlockManager#close
> --------------------------------
>
>                 Key: HDFS-3048
>                 URL: https://issues.apache.org/jira/browse/HDFS-3048
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 2.0.0-alpha
>            Reporter: Eli Collins
>            Assignee: Andy Isaacson
>             Fix For: 2.2.0-alpha
>
>         Attachments: hdfs-3048.txt, hdfs-3048.txt, hdfs-3787-2.txt
>
>
> There's a small race in BlockManager#close, we close the BlocksMap before the replication
monitor, which means the replication monitor can NPE if it tries to access the blocks map.
We need to swap the order (close the blocks map after shutting down the repl monitor).

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