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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HADOOP-528) Some hadoop distcp task fails with dfs.client.buffer.dir not found error while the property exists.
Date Tue, 23 Oct 2007 21:01:54 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Owen O'Malley resolved HADOOP-528.
----------------------------------

    Resolution: Cannot Reproduce
      Assignee:     (was: Owen O'Malley)

I haven't seen this recently and I suspect it was the race condition in creating the directories
that we used to have with mkdirs calling exists and then mkdir.

> Some hadoop distcp task fails with dfs.client.buffer.dir not found error while the property
exists.
> ---------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-528
>                 URL: https://issues.apache.org/jira/browse/HADOOP-528
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.6.0
>            Reporter: Sanjay Dahiya
>
> On some nodes hadoop distcp fails with folowing error. The property dfs.client.buffer.dir
is defined in hadoop-site.xml and the corresponding directory is also created on the node
by framework. Same configuration works on all other nodes. 
> It could be a timing issue where someone is trying to read the dir before its created
on local disk, I am not sure of the cause. 
> java.io.IOException: No valid local directories in property: dfs.client.buffer.dir at
org.apache.hadoop.conf.Configuration.getFile(Configuration.java:405) at org.apache.hadoop.dfs.DFSClient$DFSOutputStream.newBackupFile(DFSClient.java:780)
at org.apache.hadoop.dfs.DFSClient$DFSOutputStream.(DFSClient.java:770) at org.apache.hadoop.dfs.DFSClient.create(DFSClient.java:276)
at org.apache.hadoop.dfs.DistributedFileSystem.createRaw(DistributedFileSystem.java:104) at
org.apache.hadoop.fs.FSDataOutputStream$Summer.(FSDataOutputStream.java:56) at org.apache.hadoop.fs.FSDataOutputStream$Summer.(FSDataOutputStream.java:45)
at org.apache.hadoop.fs.FSDataOutputStream.(FSDataOutputStream.java:146) at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:270)
at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:177) at org.apache.hadoop.util.CopyFiles$DFSCopyFilesMapper.copy(CopyFiles.java:186)
at org.apache.hadoop.util.CopyFiles$DFSCopyFilesMapper.map(CopyFiles.java:391) at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:46)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:210) at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1066)

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