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https://issues.apache.org/jira/browse/HADOOP-4128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12629449#action_12629449
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Steve Loughran commented on HADOOP-4128:
----------------------------------------
Stack trace
[sf-startdaemon-debug] 08/09/09 12:05:27 [Thread-91] ERROR datanode.DataNode :
Exception: java.lang.NullPointerException
[sf-startdaemon-debug] java.lang.NullPointerException
[sf-startdaemon-debug] at
org.apache.hadoop.hdfs.server.datanode.FSDataset$FSDir.getBlockInfo(FSDataset.java:189)
[sf-startdaemon-debug] at
org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolume.getBlockInfo(FSDataset.java:420)
[sf-startdaemon-debug] at
org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolumeSet.getBlockInfo(FSDataset.java:518)
[sf-startdaemon-debug] at
org.apache.hadoop.hdfs.server.datanode.FSDataset.getBlockReport(FSDataset.java:1134)
[sf-startdaemon-debug] at
org.apache.hadoop.hdfs.server.datanode.DataNode.offerService(DataNode.java:773)
[sf-startdaemon-debug] at
org.apache.hadoop.hdfs.server.datanode.DataNode.run(DataNode.java:1151)
[sf-startdaemon-debug] at
org.apache.hadoop.hdfs.server.datanode.ExtDataNode.run(ExtDataNode.java:113)
[sf-startdaemon-debug] at
org.apache.hadoop.hdfs.server.datanode.ExtDataNode$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
>
> 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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