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https://issues.apache.org/jira/browse/HDFS-3436?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13278613#comment-13278613
]
Vinay commented on HDFS-3436:
-----------------------------
Thanks Nicholas, that works. I will upload a patch for that.
> Append to file is failing when one of the datanode where the block present is
> down.
> -----------------------------------------------------------------------------------
>
> Key: HDFS-3436
> URL: https://issues.apache.org/jira/browse/HDFS-3436
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Affects Versions: 2.0.0
> Reporter: Brahma Reddy Battula
> Assignee: Vinay
>
> Scenario:
> =========
> 1. Cluster with 4 DataNodes.
> 2. Written file to 3 DNs, DN1->DN2->DN3
> 3. Stopped DN3,
> Now Append to file is failing due to addDatanode2ExistingPipeline is failed.
> *CLinet Trace*
> {noformat}
> 2012-04-24 22:06:09,947 INFO hdfs.DFSClient
> (DFSOutputStream.java:createBlockOutputStream(1063)) - Exception in
> createBlockOutputStream
> java.io.IOException: Bad connect ack with firstBadLink as *******:50010
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1053)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:943)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:461)
> 2012-04-24 22:06:09,947 WARN hdfs.DFSClient
> (DFSOutputStream.java:setupPipelineForAppendOrRecovery(916)) - Error Recovery
> for block BP-1023239-10.18.40.233-1335275282109:blk_296651611851855249_1253
> in pipeline *****:50010, ******:50010, *****:50010: bad datanode ******:50010
> 2012-04-24 22:06:10,072 WARN hdfs.DFSClient (DFSOutputStream.java:run(549))
> - DataStreamer Exception
> java.io.EOFException: Premature EOF: no length prefix available
> at
> org.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed(HdfsProtoUtil.java:162)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.transfer(DFSOutputStream.java:866)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:843)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:934)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:461)
> 2012-04-24 22:06:10,072 WARN hdfs.DFSClient
> (DFSOutputStream.java:hflush(1515)) - Error while syncing
> java.io.EOFException: Premature EOF: no length prefix available
> at
> org.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed(HdfsProtoUtil.java:162)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.transfer(DFSOutputStream.java:866)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:843)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:934)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:461)
> java.io.EOFException: Premature EOF: no length prefix available
> at
> org.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed(HdfsProtoUtil.java:162)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.transfer(DFSOutputStream.java:866)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:843)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:934)
> at
> org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:461)
> {noformat}
> *DataNode Trace*
> {noformat}
> 2012-05-17 15:39:12,261 ERROR datanode.DataNode (DataXceiver.java:run(193)) -
> host0.foo.com:49744:DataXceiver error processing TRANSFER_BLOCK operation
> src: /127.0.0.1:49811 dest: /127.0.0.1:49744
> java.io.IOException:
> BP-2001850558-xx.xx.xx.xx-1337249347060:blk_-8165642083860293107_1002 is
> neither a RBW nor a Finalized, r=ReplicaBeingWritten,
> blk_-8165642083860293107_1003, RBW
> getNumBytes() = 1024
> getBytesOnDisk() = 1024
> getVisibleLength()= 1024
> getVolume() =
> E:\MyWorkSpace\branch-2\Test\build\test\data\dfs\data\data1\current
> getBlockFile() =
> E:\MyWorkSpace\branch-2\Test\build\test\data\dfs\data\data1\current\BP-2001850558-xx.xx.xx.xx-1337249347060\current\rbw\blk_-8165642083860293107
> bytesAcked=1024
> bytesOnDisk=102
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.transferReplicaForPipelineRecovery(DataNode.java:2038)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.transferBlock(DataXceiver.java:525)
> at
> org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opTransferBlock(Receiver.java:114)
> at
> org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:78)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:189)
> at java.lang.Thread.run(Unknown Source)
> {noformat}
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