NullPointerException in INode prevent Namenode from starting
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Key: HADOOP-3736
URL: https://issues.apache.org/jira/browse/HADOOP-3736
Project: Hadoop Core
Issue Type: Bug
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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