distcp job failed
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Key: HADOOP-2042
URL: https://issues.apache.org/jira/browse/HADOOP-2042
Project: Hadoop
Issue Type: Bug
Affects Versions: 0.15.0
Reporter: Runping Qi
I was running distcp to copy data from one dfs to another.
The job failed with the following exception in the mappers:
java.net.SocketException: Connection reset
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:96)
at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
at
java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:109)
at java.io.DataOutputStream.write(DataOutputStream.java:90)
at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.endBlock(DFSClient.java:1633)
at
org.apache.hadoop.dfs.DFSClient$DFSOutputStream.close(DFSClient.java:1720)
at
org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:49)
at
org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:64)
at
org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.copy(CopyFiles.java:305)
at
org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.map(CopyFiles.java:352)
at
org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.map(CopyFiles.java:217)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:195)
at
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1750)
I examined the data node logs of the target dfs. I saw a lot of exceptions like:
2007-10-12 15:04:09,109 ERROR org.apache.hadoop.dfs.DataNode: DataXceiver:
java.io.EOFException
at java.io.DataInputStream.readInt(DataInputStream.java:375)
at
org.apache.hadoop.dfs.DataNode$BlockReceiver.receiveBlock(DataNode.java:1365)
at
org.apache.hadoop.dfs.DataNode$DataXceiver.writeBlock(DataNode.java:897)
at org.apache.hadoop.dfs.DataNode$DataXceiver.run(DataNode.java:763)
at java.lang.Thread.run(Thread.java:619)
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