ERROR Block blk_XXX_1030 already exists in state RBW and thus cannot be created
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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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