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https://issues.apache.org/jira/browse/HADOOP-2129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12541447
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chris.douglas edited comment on HADOOP-2129 at 11/9/07 1:38 PM:
----------------------------------------------------------------
Copy from A to B, by running distcp on B with -i (ignore read failures)
generated the following exception trace (prolifically):
{noformat}
FAIL hdfs://namenode-of-B:8600/targetdir/targetfile :
org.apache.hadoop.ipc.RemoteException: java.io.IOException: Cannot open
filename /targetdir/targetfile
at org.apache.hadoop.dfs.NameNode.open(NameNode.java:238)
at sun.reflect.GeneratedMethodAccessor3.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.open(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.$Proxy1.open(Unknown Source)
at
org.apache.hadoop.dfs.DFSClient$DFSInputStream.openInfo(DFSClient.java:848)
at
org.apache.hadoop.dfs.DFSClient$DFSInputStream.<init>(DFSClient.java:840)
at org.apache.hadoop.dfs.DFSClient.open(DFSClient.java:285)
at
org.apache.hadoop.dfs.DistributedFileSystem.open(DistributedFileSystem.java:114)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:244)
at
org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.copy(CopyFiles.java:289)
at
org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.map(CopyFiles.java:367)
at
org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.map(CopyFiles.java:218)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:192)
at
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1760)
{noformat}
All the directories were created successfully- so the src file list is readable
at the destination- but none of the files could be opened at src.
The trace through o.a.h.u.CopyFiles doesn't match what's in the repository,
though. Is this running with any custom patches?
was (Author: chris.douglas):
Copy from A to B, by running distcp on B with -i (ignore read failures)
generated the following exception trace (prolifically):
{{noformat}}
FAIL hdfs://namenode-of-B:8600/targetdir/targetfile :
org.apache.hadoop.ipc.RemoteException: java.io.IOException: Cannot open
filename /targetdir/targetfile
at org.apache.hadoop.dfs.NameNode.open(NameNode.java:238)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$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.$Proxy1.open(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
at
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
at org.apache.hadoop.dfs.$Proxy1.open(Unknown Source)
at
org.apache.hadoop.dfs.DFSClient$DFSInputStream.openInfo(DFSClient.java:848)
at
org.apache.hadoop.dfs.DFSClient$DFSInputStream.<init>(DFSClient.java:840)
at org.apache.hadoop.dfs.DFSClient.open(DFSClient.java:285)
at
org.apache.hadoop.dfs.DistributedFileSystem.open(DistributedFileSystem.java:114)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:244)
at
org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.copy(CopyFiles.java:289)
at
org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.map(CopyFiles.java:367)
at
org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.map(CopyFiles.java:218)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:192)
at
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1760)
{{noformat}}
All the directories were created successfully- so the src file list is readable
at the destination- but none of the files could be opened at src.
The trace through o.a.h.u.CopyFiles doesn't match what's in the repository,
though. Is this running with any custom patches?
> distcp between two clusters does not work if it is run on the target cluster
> ----------------------------------------------------------------------------
>
> Key: HADOOP-2129
> URL: https://issues.apache.org/jira/browse/HADOOP-2129
> Project: Hadoop
> Issue Type: Bug
> Components: util
> Affects Versions: 0.16.0
> Environment: Nightly build:
> http://hadoopqa.yst.corp.yahoo.com:8080/hudson/job/Hadoop-LinuxTest/718/
> With patches for HADOOP-2033 and HADOOP-2048.
> Reporter: Murtaza A. Basrai
> Assignee: Chris Douglas
> Priority: Critical
>
> I am trying to copy a directory (~100k files, ~500GB) between two clusters A
> and B (~70 nodes), using a command like:
> hadoop distcp -log /logdir hdfs://namenode-of-A:8600/srcdir
> hdfs://namenode-of-B:8600/targetdir
> I tried 4 ways of doing it:
> 1) Copy from A to B, by running distcp on A
> 2) Copy from A to B, by running distcp on B
> 3) Copy from B to A, by running distcp on B
> 4) Copy from B to A, by running distcp on A
> Invocations 1 and 3 succeeded, but 2 and 4 failed.
> I got a lot of errors of the type below:
> 07/10/30 20:52:11 INFO mapred.JobClient: Running job: job_200710180049_0115
> 07/10/30 20:52:12 INFO mapred.JobClient: map 0% reduce 0%
> 07/10/30 20:54:41 INFO mapred.JobClient: map 1% reduce 0%
> 07/10/30 20:56:52 INFO mapred.JobClient: map 2% reduce 0%
> 07/10/30 20:57:41 INFO mapred.JobClient: Task Id :
> task_200710180049_0115_m_000184_0, Status : FAILED
> java.io.IOException: Some copies could not complete. See log for details.
> at
> org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.close(CopyFiles.java:407)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:53)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:192)
> at
> org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1760)
> followed by the job failing:
> 07/10/30 22:07:41 INFO mapred.JobClient: map 99% reduce 100%
> Copy failed: java.io.IOException: Job failed!
> at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:688)
> at org.apache.hadoop.util.CopyFiles.copy(CopyFiles.java:481)
> at org.apache.hadoop.util.CopyFiles.run(CopyFiles.java:555)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:54)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:67)
> at org.apache.hadoop.util.CopyFiles.main(CopyFiles.java:566)
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