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Posted to hdfs-dev@hadoop.apache.org by "Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org> on 2011/03/04 17:57:37 UTC
[jira] Resolved: (HDFS-121) NullPointerException in INode prevent
Namenode from starting
[ https://issues.apache.org/jira/browse/HDFS-121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tsz Wo (Nicholas), SZE resolved HDFS-121.
-----------------------------------------
Resolution: Not A Problem
Closing. Please feel free to reopen if this is still a problem.
> NullPointerException in INode prevent Namenode from starting
> ------------------------------------------------------------
>
> Key: HDFS-121
> URL: https://issues.apache.org/jira/browse/HDFS-121
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Environment: CentOS 5, Sun JDK 1.5.0_15
> Reporter: Xavier Stevens
>
> After a headnode went down due to a kernel panic, it was restarted. When trying to restart the Hadoop process we encountered the following NullPointerException. It seems this should be handled more gracefully allowing the Name Node to come up and function while either deleting or ignoring the problematic INodes.
> 2008-07-09 14:30:11,458 INFO org.apache.hadoop.fs.FSNamesystem: isPermissionEnabled=true
> 2008-07-09 14:30:12,713 ERROR org.apache.hadoop.dfs.NameNode: java.lang.NullPointerException
> at org.apache.hadoop.dfs.INodeDirectory.getExistingPathINodes(INode.java:408)
> at org.apache.hadoop.dfs.INodeDirectory.getNode(INode.java:357)
> at org.apache.hadoop.dfs.INodeDirectory.getNode(INode.java:365)
> at org.apache.hadoop.dfs.FSDirectory.unprotectedDelete(FSDirectory.java:458)
> at org.apache.hadoop.dfs.FSEditLog.loadFSEdits(FSEditLog.java:537)
> at org.apache.hadoop.dfs.FSImage.loadFSEdits(FSImage.java:756)
> at org.apache.hadoop.dfs.FSImage.loadFSImage(FSImage.java:639)
> at org.apache.hadoop.dfs.FSImage.recoverTransitionRead(FSImage.java:222)
> at org.apache.hadoop.dfs.FSDirectory.loadFSImage(FSDirectory.java:79)
> at org.apache.hadoop.dfs.FSNamesystem.initialize(FSNamesystem.java:254)
> at org.apache.hadoop.dfs.FSNamesystem.<init>(FSNamesystem.java:235)
> at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:131)
> at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:176)
> at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:162)
> at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:846)
> at org.apache.hadoop.dfs.NameNode.main(NameNode.java:855)
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