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Michael Bieniosek commented on HADOOP-1502: ------------------------------------------- So, in my case, the problem was that the user of the fs client didn't have write permission to dfs.client.buffer.dir. In this case, we should probably make the error message more clear. > IOException at task startup "No valid local directories in property: > dfs.client.buffer.dir" > ------------------------------------------------------------------------------------------- > > Key: HADOOP-1502 > URL: https://issues.apache.org/jira/browse/HADOOP-1502 > Project: Hadoop > Issue Type: Bug > Components: dfs > Affects Versions: 0.12.3 > Reporter: Koji Noguchi > Priority: Minor > > When tasks started up on a brand new mapred cluster, I saw couples of them > fail immediately by > java.io.IOException: No valid local directories in property: > dfs.client.buffer.dir > at org.apache.hadoop.conf.Configuration.getFile(Configuration.java:401) > at > org.apache.hadoop.dfs.DFSClient$DFSOutputStream.newBackupFile(DFSClient.java:1037) > at org.apache.hadoop.dfs.DFSClient$DFSOutputStream.(DFSClient.java:1004) > at org.apache.hadoop.dfs.DFSClient.create(DFSClient.java:276) > at > org.apache.hadoop.dfs.DistributedFileSystem$RawDistributedFileSystem.create(DistributedFileSystem.java:143) > at > org.apache.hadoop.fs.ChecksumFileSystem$FSOutputSummer.(ChecksumFileSystem.java:367) > at > org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:442) > at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:346) > at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:253) > at > org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.copy(CopyFiles.java:215) > at > org.apache.hadoop.util.CopyFiles$FSCopyFilesMapper.map(CopyFiles.java:410) > at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:48) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:175) > at > org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1445) > (Run on version 0.12.3 + many patches, so the line number could be a little > off) -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.