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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HDFS-742) A down DataNode makes Balancer to hang on repeatingly asking NameNode its partial block list
Date Thu, 29 Oct 2009 00:44:59 GMT
A down DataNode makes Balancer to hang on repeatingly asking NameNode its partial block list
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                 Key: HDFS-742
                 URL: https://issues.apache.org/jira/browse/HDFS-742
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Hairong Kuang
            Assignee: Hairong Kuang


We had a balancer that had not made any progress for a long time. It turned out it was repeatingly
asking Namenode for a partial block list of one datanode, which was done while the balancer
was running.

NameNode should notify Balancer that the datanode is not available and Balancer should stop
asking for the datanode's block list.


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