[MAPREDUCE-54] distcp failed due to problem in creating files

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Assignee: Unassigned
• Reporter: Runping Qi
• Created: 13/Oct/07 03:32
• Updated: 31/Dec/11 09:38
• Resolved: 31/Dec/11 09:38

Description

When I run a distcp program to copy files from one dfs to another, my job failed with
the mappers throwing the following exception:

org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.dfs.AlreadyBeingCreatedException: failed to create file /xxxxx/part-00007 for DFSClient_task_200710122302_0002_m_000456_2 on client 72.30.43.23 because current leaseholder is trying to recreate file.
at org.apache.hadoop.dfs.FSNamesystem.startFileInternal(FSNamesystem.java:850)
at org.apache.hadoop.dfs.FSNamesystem.startFile(FSNamesystem.java:806)
at org.apache.hadoop.dfs.NameNode.create(NameNode.java:333)
at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:379)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:596)

at org.apache.hadoop.ipc.Client.call(Client.java:482)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:184)
at org.apache.hadoop.dfs.$Proxy1.create(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
at org.apache.hadoop.dfs.$Proxy1.create(Unknown Source)
at org.apache.hadoop.dfs.DFSClient$DFSOutputStream.(DFSClient.java:1432)
at org.apache.hadoop.dfs.DFSClient.create(DFSClient.java:376)
at org.apache.hadoop.dfs.DistributedFileSystem.create(DistributedFileSystem.java:121)
at org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.copy(CopyFiles.java:284)
at org.apache.hadoop.util.CopyFiles$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)

It seems that this problem happened in the 2nd, 3rd, 4th attempts,
after the first attemp failed.

Issue Links

• is related to: HADOOP-2087 Errors for subsequent requests for file creation after original DFSClient goes down..