Brahma Reddy Battula created HDFS-3436:
------------------------------------------
Summary: 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
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-2001850558-10.18.47.190-1337249347060: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-2001850558-10.18.47.190-1337249347060\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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