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Date: Wed, 1 Aug 2012 03:38:34 +0000 (UTC)
From: "meng gong (JIRA)" <jira@apache.org>
To: hdfs-dev@hadoop.apache.org
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Subject: [jira] [Resolved] (HDFS-3746) Invalid counter tag in HDFS balancer
 which lead to infinite loop
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     [ https://issues.apache.org/jira/browse/HDFS-3746?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

meng gong resolved HDFS-3746.
-----------------------------

      Resolution: Fixed
    Release Note: Changed banlancer to single instance model for every namenode in the multiNameNode frame
    
> Invalid counter tag in HDFS balancer which lead to infinite loop
> ----------------------------------------------------------------
>
>                 Key: HDFS-3746
>                 URL: https://issues.apache.org/jira/browse/HDFS-3746
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: balancer
>    Affects Versions: 2.1.0-alpha, 3.0.0
>            Reporter: meng gong
>            Assignee: Jing Zhao
>              Labels: patch
>             Fix For: 2.1.0-alpha, 3.0.0
>
>
> Everytime banlancer try to move a block cross the rack. For every NameNodeConnector it will instance a new banlancer. The tag notChangedIterations is reseted to 0. Then it won't reach 5 and exit the thread for not moved in 5 consecutive iterations. This lead to a infinite loop

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