distcp fails
------------
Key: HADOOP-4318
URL: https://issues.apache.org/jira/browse/HADOOP-4318
Project: Hadoop Core
Issue Type: Bug
Affects Versions: 0.17.2
Reporter: Christian Kunz
Priority: Blocker
Fix For: 0.17.3
we run distcp between two clusters running 0.17.2 using hdfs.
As long as one of the tasks fails after opening a file for writing (which
typically always happens), subsequent retries will always fail with the
following exception (we did not see this with 0.16.3, seems to be a regression):
2008-09-30 22:54:49,430 INFO org.apache.hadoop.util.CopyFiles: FAIL 3169 :
org.apache.hadoop.ipc.RemoteException:
org.apache.hadoop.dfs.AlreadyBeingCreatedException: failed to create file
xxx/_distcp_tmp_dvml74/3169 for DFSClient_task_200809121811_0034_m_001085_1 on
client xxx.yyy.zzz.uuu because current leaseholder is trying to recreate file.
at
org.apache.hadoop.dfs.FSNamesystem.startFileInternal(FSNamesystem.java:1010)
at org.apache.hadoop.dfs.FSNamesystem.startFile(FSNamesystem.java:967)
at org.apache.hadoop.dfs.NameNode.create(NameNode.java:269)
at sun.reflect.GeneratedMethodAccessor18.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$Server.call(RPC.java:446)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:896)
at org.apache.hadoop.ipc.Client.call(Client.java:557)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:212)
at org.apache.hadoop.dfs.$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.<init>(DFSClient.java:2192)
at org.apache.hadoop.dfs.DFSClient.create(DFSClient.java:479)
at
org.apache.hadoop.dfs.DistributedFileSystem.create(DistributedFileSystem.java:138)
at
org.apache.hadoop.util.CopyFiles$CopyFilesMapper.create(CopyFiles.java:317)
at
org.apache.hadoop.util.CopyFiles$CopyFilesMapper.copy(CopyFiles.java:369)
at
org.apache.hadoop.util.CopyFiles$CopyFilesMapper.map(CopyFiles.java:493)
at
org.apache.hadoop.util.CopyFiles$CopyFilesMapper.map(CopyFiles.java:268)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:47)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:219)
at
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2122)
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