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} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira