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https://issues.apache.org/jira/browse/HDFS-6123?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo Nicholas Sze updated HDFS-6123:
--------------------------------------
Resolution: Fixed
Fix Version/s: 2.4.0
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
Thanks Brandon for reviewing the patch.
I have committed this.
> Improve datanode error messages
> -------------------------------
>
> Key: HDFS-6123
> URL: https://issues.apache.org/jira/browse/HDFS-6123
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Tsz Wo Nicholas Sze
> Priority: Minor
> Fix For: 2.4.0
>
> Attachments: 6123_20140318.patch
>
>
> [~yeshavora] found two cases that there are unnecessary exception stack trace
> in datanode log:
> - SocketTimeoutException
> {noformat}
> 2014-03-07 03:30:44,567 INFO datanode.DataNode
> (BlockSender.java:sendPacket(563)) - exception:
> java.net.SocketTimeoutException: 480000 millis timeout while waiting for
> channel to be ready for write. ch : java.nio.channels.SocketChannel[connected
> local=/xx.xx.xx.xx:1019 remote=/xx.xx.xx.xx:37997]
> at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:164)
> ...
> {noformat}
> - ReplicaAlreadyExistsException
> {noformat}
> 2014-03-07 03:02:39,334 ERROR datanode.DataNode (DataXceiver.java:run(234)) -
> xx.xx.xx.xx:1019:DataXceiver error processing WRITE_BLOCK operation src:
> /xx.xx.xx.xx:32959 dest: /xx.xx.xx.xx:1019
> org.apache.hadoop.hdfs.server.datanode.ReplicaAlreadyExistsException: Block
> BP-1409640778-xx.xx.xx.xx-1394150965191:blk_1073742158_1334 already exists in
> state TEMPORARY and thus cannot be created.
> at
> org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl.createTemporary(FsDatasetImpl.java:874)
> ...
> {noformat}
> Both cases are normal. They are not bugs.
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