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https://issues.apache.org/jira/browse/HDFS-6247?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14097130#comment-14097130
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Hudson commented on HDFS-6247:
------------------------------
SUCCESS: Integrated in Hadoop-Mapreduce-trunk #1863 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1863/])
HDFS-6247. Avoid timeouts for replaceBlock() call by sending intermediate
responses to Balancer (vinayakumarb) (vinayakumarb:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1617799)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Dispatcher.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockReceiver.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataXceiver.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/proto/datatransfer.proto
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestBlockReplacement.java
> Avoid timeouts for replaceBlock() call by sending intermediate responses to
> Balancer
> ------------------------------------------------------------------------------------
>
> Key: HDFS-6247
> URL: https://issues.apache.org/jira/browse/HDFS-6247
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer, datanode
> Affects Versions: 2.4.0
> Reporter: Vinayakumar B
> Assignee: Vinayakumar B
> Fix For: 2.6.0
>
> Attachments: HDFS-6247.patch, HDFS-6247.patch, HDFS-6247.patch,
> HDFS-6247.patch, HDFS-6247.patch, HDFS-6247.patch, HDFS-6247.patch,
> HDFS-6247.patch
>
>
> Currently there is no response sent from target Datanode to Balancer for the
> replaceBlock() calls.
> Since the Block movement for balancing is throttled, complete block movement
> will take time and this could result in timeout at Balancer, which will be
> trying to read the status message.
>
> To Avoid this during replaceBlock() call in in progress Datanode can send
> IN_PROGRESS status messages to Balancer to avoid timeouts and treat
> BlockMovement as failed.
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