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Mit Desai commented on HDFS-742: -------------------------------- Attached modified patch. But still, I do not have a unit test for the fix > A down DataNode makes Balancer to hang on repeatingly asking NameNode its > partial block list > -------------------------------------------------------------------------------------------- > > Key: HDFS-742 > URL: https://issues.apache.org/jira/browse/HDFS-742 > Project: Hadoop HDFS > Issue Type: Bug > Components: balancer & mover > Reporter: Hairong Kuang > Assignee: Mit Desai > Attachments: HDFS-742-trunk.patch, HDFS-742.patch > > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)