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https://issues.apache.org/jira/browse/HDFS-721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
stack resolved HDFS-721.
------------------------
Resolution: Invalid
Working as designed. Closing.
> ERROR Block blk_XXX_1030 already exists in state RBW and thus cannot be
> created
> -------------------------------------------------------------------------------
>
> Key: HDFS-721
> URL: https://issues.apache.org/jira/browse/HDFS-721
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 0.21.0
> Environment: dfs.support.append=true
> Current branch-0.21 of hdfs, mapreduce, and common. Here is svn info:
> URL: https://svn.apache.org/repos/asf/hadoop/hdfs/branches/branch-0.21
> Repository Root: https://svn.apache.org/repos/asf
> Repository UUID: 13f79535-47bb-0310-9956-ffa450edef68
> Revision: 827883
> Node Kind: directory
> Schedule: normal
> Last Changed Author: szetszwo
> Last Changed Rev: 826906
> Last Changed Date: 2009-10-20 00:16:25 +0000 (Tue, 20 Oct 2009)
> Reporter: stack
>
> Running some loading tests against hdfs branch-0.21 I got the following:
> {code}
> 2009-10-21 04:57:10,770 INFO org.apache.hadoop.hdfs.server.datanode.DataNode:
> Receiving block blk_6345892463926159834_1030 src: /XX.XX.XX.141:53112 dest:
> /XX.XX.XX.140:51010
> 2009-10-21 04:57:10,771 INFO org.apache.hadoop.hdfs.server.datanode.DataNode:
> writeBlock blk_6345892463926159834_1030 received exception
> org.apache.hadoop.hdfs.server.datanode.ReplicaAlreadyExistsException: Block
> blk_6345892463926159834_1030 already exists in state RBW and thus cannot be
> created.
> 2009-10-21 04:57:10,771 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode:
> DatanodeRegistration(XX.XX.XX.140:51010,
> storageID=DS-1292310101-XX.XX.XX.140-51010-1256100924816, infoPort=51075,
> ipcPort=51020):DataXceiver
> org.apache.hadoop.hdfs.server.datanode.ReplicaAlreadyExistsException: Block
> blk_6345892463926159834_1030 already exists in state RBW and thus cannot be
> created.
> at
> org.apache.hadoop.hdfs.server.datanode.FSDataset.createTemporary(FSDataset.java:1324)
> at
> org.apache.hadoop.hdfs.server.datanode.BlockReceiver.<init>(BlockReceiver.java:98)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.opWriteBlock(DataXceiver.java:258)
> at
> org.apache.hadoop.hdfs.protocol.DataTransferProtocol$Receiver.opWriteBlock(DataTransferProtocol.java:382)
> at
> org.apache.hadoop.hdfs.protocol.DataTransferProtocol$Receiver.processOp(DataTransferProtocol.java:323)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:111)
> at java.lang.Thread.run(Thread.java:619)
> {code}
> On the sender side:
> {code}
> 2009-10-21 04:57:10,740 INFO org.apache.hadoop.hdfs.server.datanode.DataNode:
> DatanodeRegistration(XX.XX.XX.141:51010,
> storageID=DS-1870884070-XX.XX.XX.141-51010-1256100925196, infoPort=51075,
> ipcPort=51020) Starting thread to transfer block blk_6345892463926159834_1030
> to XX.XX.XX.140:51010
> 2009-10-21 04:57:10,770 WARN org.apache.hadoop.hdfs.server.datanode.DataNode:
> DatanodeRegistration(XX.XX.XX.141:51010,
> storageID=DS-1870884070-XX.XX.XX.141-51010-1256100925196, infoPort=51075,
> ipcPort=51020):Failed to transfer blk_6345892463926159834_1030 to
> XX.XX.XX.140:51010 got java.net.SocketException: Original Exception :
> java.io.IOException: Connection reset by peer
> at sun.nio.ch.FileChannelImpl.transferTo0(Native Method)
> at sun.nio.ch.FileChannelImpl.transferToDirectly(FileChannelImpl.java:415)
> at sun.nio.ch.FileChannelImpl.transferTo(FileChannelImpl.java:516)
> at
> org.apache.hadoop.net.SocketOutputStream.transferToFully(SocketOutputStream.java:199)
> at
> org.apache.hadoop.hdfs.server.datanode.BlockSender.sendChunks(BlockSender.java:346)
> at
> org.apache.hadoop.hdfs.server.datanode.BlockSender.sendBlock(BlockSender.java:434)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode$DataTransfer.run(DataNode.java:1262)
> at java.lang.Thread.run(Thread.java:619)
> Caused by: java.io.IOException: Connection reset by peer
> ... 8 more
> {code}
> The block sequence number, 1030, is one more than that in issue HDFS-720
> (same test run but about 8 seconds between errors.
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