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https://issues.apache.org/jira/browse/HADOOP-1372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12504792
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Devaraj Das commented on HADOOP-1372:
-------------------------------------
+1
> DFS Clients should start using the org.apache.hadoop.fs.LocalDirAllocator
> -------------------------------------------------------------------------
>
> Key: HADOOP-1372
> URL: https://issues.apache.org/jira/browse/HADOOP-1372
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Reporter: Devaraj Das
> Assignee: dhruba borthakur
> Fix For: 0.14.0
>
> Attachments: localDirAllocator2.patch
>
>
> I encountered this exception during one of the randomwriter runs. I think
> this situation can be improved by using
> org.apache.hadoop.fs.LocalDirAllocator that has been written to handle these
> kind of problems. I set the fix version as 0.14 but wonder whether it makes
> sense to have it in 0.13 itself (since the amount of code change would not be
> much).
> java.io.FileNotFoundException: /local/dfs/data/tmp/client-1299146109450372217
> (Read-only file system)
> at java.io.FileOutputStream.open(Native Method)
> at java.io.FileOutputStream.(FileOutputStream.java:179)
> at java.io.FileOutputStream.(FileOutputStream.java:131)
> at
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream.endBlock(DFSClient.java:1356)
> at
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream.flush(DFSClient.java:1273)
> at
> org.apache.hadoop.dfs.DFSClient$DFSOutputStream.write(DFSClient.java:1255)
> at
> org.apache.hadoop.fs.FSDataOutputStream$PositionCache.write(FSDataOutputStream.java:38)
> at java.io.BufferedOutputStream.write(BufferedOutputStream.java:105)
> at java.io.DataOutputStream.write(DataOutputStream.java:90)
> at
> org.apache.hadoop.fs.ChecksumFileSystem$FSOutputSummer.write(ChecksumFileSystem.java:402)
> at
> org.apache.hadoop.fs.FSDataOutputStream$PositionCache.write(FSDataOutputStream.java:38)
> at
> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
> at java.io.BufferedOutputStream.write(BufferedOutputStream.java:109)
> at java.io.DataOutputStream.write(DataOutputStream.java:90)
> at
> org.apache.hadoop.io.SequenceFile$Writer.append(SequenceFile.java:775)
> at
> org.apache.hadoop.examples.RandomWriter$Map.map(RandomWriter.java:152)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:48)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:187)
> at
> org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1709)
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