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https://issues.apache.org/jira/browse/HADOOP-4128?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Steve Loughran updated HADOOP-4128:
-----------------------------------

    Attachment: hadoop-4128.patch

This patch changes the stack trace to one that lists the directory at fault. It 
does not make the root cause go away, which could be a race condition or some 
other problem:

[sf-startdaemon-debug] 08/09/09 12:35:46 [Thread-49] ERROR datanode.DataNode : 
Exception: java.lang.IllegalStateException: Not a valid directory: 
/tmp/tempdir16656/current
[sf-startdaemon-debug] java.lang.IllegalStateException: Not a valid directory: 
/tmp/tempdir16656/current
[sf-startdaemon-debug]  at 
org.apache.hadoop.hdfs.server.datanode.FSDataset$FSDir.getBlockInfo(FSDataset.java:190)
[sf-startdaemon-debug]  at 
org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolume.getBlockInfo(FSDataset.java:423)
[sf-startdaemon-debug]  at 
org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolumeSet.getBlockInfo(FSDataset.java:521)
[sf-startdaemon-debug]  at 
org.apache.hadoop.hdfs.server.datanode.FSDataset.getBlockReport(FSDataset.java:1137)
[sf-startdaemon-debug]  at 
org.apache.hadoop.hdfs.server.datanode.DataNode.offerService(DataNode.java:773)
[sf-startdaemon-debug]  at 
org.apache.hadoop.hdfs.server.datanode.DataNode.run(DataNode.java:1151)
[sf-startdaemon-debug]  at 
org.apache.hadoop.hdfs.server.datanode.ExtDataNode.run(ExtDataNode.java:113)
[sf-startdaemon-debug]  at 
org.apache.hadoop.hdfs.server.datanode.ExtDataNode$DataNodeThread.execute(ExtDataNode.java:177)
[sf-startdaemon-debug]  at 
org.smartfrog.sfcore.utils.SmartFrogThread.run(SmartFrogThread.java:279)
[sf-startdaemon-debug]  at 
org.smartfrog.sfcore.utils.WorkflowThread.run(WorkflowThread.java:117)


> NPE in FSDir.getBlockInfo
> -------------------------
>
>                 Key: HADOOP-4128
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4128
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.19.0
>            Reporter: Steve Loughran
>            Priority: Minor
>         Attachments: hadoop-4128.patch
>
>
> This could well be something I've introduced on my variant of the code, 
> although its a recent arrival in my own tests: an NPE while bringing up a 
> datanode.

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