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https://issues.apache.org/jira/browse/HDFS-742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15406286#comment-15406286
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Hudson commented on HDFS-742:
-----------------------------
SUCCESS: Integrated in Hadoop-trunk-Commit #10203 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/10203/])
HDFS-742. A down DataNode makes Balancer to hang on repeatingly asking (kihwal:
rev 58db263e93daf08280e6a586a10cebd6122cf72a)
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java
> 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
> Priority: Minor
> Fix For: 2.8.0, 2.9.0, 3.0.0-alpha2
>
> Attachments: HDFS-742-trunk.patch, HDFS-742.patch,
> HDFS-742.v1.trunk.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.
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