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Posted to hdfs-dev@hadoop.apache.org by "Eli Collins (Created) (JIRA)" <ji...@apache.org> on 2012/03/05 21:21:58 UTC

[jira] [Created] (HDFS-3048) Small race in BlockManager#close

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: 0.23.2
            Reporter: Eli Collins
            Assignee: Eli Collins


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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[jira] [Reopened] (HDFS-3048) Small race in BlockManager#close

Posted by "Eli Collins (JIRA)" <ji...@apache.org>.

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

Eli Collins reopened 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: 0.23.2
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>         Attachments: hdfs-3048.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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