Rakesh R created HDFS-11164:
-------------------------------
Summary: 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
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}}. This
retry is unnecessary and would be good to avoid retry attempts as pinned block
won't be able to move.
{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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