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Posted to common-dev@hadoop.apache.org by "Robert Chansler (JIRA)" <ji...@apache.org> on 2008/08/08 20:13:44 UTC
[jira] Updated: (HADOOP-3736) NullPointerException in INode prevent
Namenode from starting
[ https://issues.apache.org/jira/browse/HADOOP-3736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Chansler updated HADOOP-3736:
------------------------------------
Component/s: dfs
> NullPointerException in INode prevent Namenode from starting
> ------------------------------------------------------------
>
> Key: HADOOP-3736
> URL: https://issues.apache.org/jira/browse/HADOOP-3736
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.16.4
> 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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