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https://issues.apache.org/jira/browse/HDFS-5579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13870630#comment-13870630
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Hudson commented on HDFS-5579:
------------------------------
SUCCESS: Integrated in Hadoop-Yarn-trunk #452 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/452/])
HDFS-5579. Under construction files make DataNode decommission take very long
hours. Contributed by zhaoyunjiong. (jing9:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1557904)
* /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/blockmanagement/BlockCollection.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/INodeFile.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDecommission.java
> Under construction files make DataNode decommission take very long hours
> ------------------------------------------------------------------------
>
> Key: HDFS-5579
> URL: https://issues.apache.org/jira/browse/HDFS-5579
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 1.2.0, 2.2.0
> Reporter: zhaoyunjiong
> Assignee: zhaoyunjiong
> Fix For: 2.4.0
>
> Attachments: HDFS-5579-branch-1.2.patch, HDFS-5579.patch
>
>
> We noticed that some times decommission DataNodes takes very long time, even
> exceeds 100 hours.
> After check the code, I found that in
> BlockManager:computeReplicationWorkForBlocks(List<List<Block>>
> blocksToReplicate) it won't replicate blocks which belongs to under
> construction files, however in
> BlockManager:isReplicationInProgress(DatanodeDescriptor srcNode), if there
> is block need replicate no matter whether it belongs to under construction or
> not, the decommission progress will continue running.
> That's the reason some time the decommission takes very long time.
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