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https://issues.apache.org/jira/browse/HDFS-11164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15734561#comment-15734561
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Surendra Singh Lilhore commented on HDFS-11164:
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I tested and its working fine.
I have one suggestion here.
I feel pinned block information should be given by namenode (Dananode will send
pinned block info to namenode in block report). So we can skip first try also
to move pinned blocks..
> Mover should avoid unnecessary retries if the block is pinned
> -------------------------------------------------------------
>
> Key: HDFS-11164
> URL: https://issues.apache.org/jira/browse/HDFS-11164
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer & mover
> Reporter: Rakesh R
> Assignee: Rakesh R
> Attachments: HDFS-11164-00.patch, HDFS-11164-01.patch,
> HDFS-11164-02.patch, HDFS-11164-03.patch
>
>
> When mover is trying to move a pinned block to another datanode, it will
> internally hits the following IOException and mark the block movement as
> {{failure}}. Since the Mover has {{dfs.mover.retry.max.attempts}} configs, it
> will continue moving this block until it reaches {{retryMaxAttempts}}. If the
> block movement failure(s) are only due to block pinning, then retry is
> unnecessary. The idea of this jira is to avoid retry attempts of pinned
> blocks as they won't be able to move to a different node.
> {code}
> 2016-11-22 10:56:10,537 WARN
> org.apache.hadoop.hdfs.server.balancer.Dispatcher: Failed to move
> blk_1073741825_1001 with size=52 from 127.0.0.1:19501:DISK to
> 127.0.0.1:19758:ARCHIVE through 127.0.0.1:19501
> java.io.IOException: Got error, status=ERROR, status message opReplaceBlock
> BP-1772076264-10.252.146.200-1479792322960:blk_1073741825_1001 received
> exception java.io.IOException: Got error, status=ERROR, status message Not
> able to copy block 1073741825 to /127.0.0.1:19826 because it's pinned , copy
> block BP-1772076264-10.252.146.200-1479792322960:blk_1073741825_1001 from
> /127.0.0.1:19501, reportedBlock move is failed
> at
> org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:118)
> at
> org.apache.hadoop.hdfs.server.balancer.Dispatcher$PendingMove.receiveResponse(Dispatcher.java:417)
> at
> org.apache.hadoop.hdfs.server.balancer.Dispatcher$PendingMove.dispatch(Dispatcher.java:358)
> at
> org.apache.hadoop.hdfs.server.balancer.Dispatcher$PendingMove.access$5(Dispatcher.java:322)
> at
> org.apache.hadoop.hdfs.server.balancer.Dispatcher$1.run(Dispatcher.java:1075)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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