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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (HDFS-3048) Small race in BlockManager#close
Date Thu, 11 Oct 2012 17:46:59 GMT

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

Arun C Murthy closed HDFS-3048.
-------------------------------

    
> 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: 2.0.2-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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