You are viewing a plain text version of this content. The canonical link for it is here.
Posted to common-dev@hadoop.apache.org by "dhruba borthakur (JIRA)" <ji...@apache.org> on 2007/03/28 23:39:25 UTC
[jira] Assigned: (HADOOP-1178) NullPointer Exception in
org.apache.hadoop.dfs.NameNode.isDir on namenode restart
[ https://issues.apache.org/jira/browse/HADOOP-1178?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
dhruba borthakur reassigned HADOOP-1178:
----------------------------------------
Assignee: dhruba borthakur
> NullPointer Exception in org.apache.hadoop.dfs.NameNode.isDir on namenode restart
> ---------------------------------------------------------------------------------
>
> Key: HADOOP-1178
> URL: https://issues.apache.org/jira/browse/HADOOP-1178
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Reporter: dhruba borthakur
> Assigned To: dhruba borthakur
> Fix For: 0.12.2
>
>
> On a namenode restart, I sometimes get the following exception. The problem is that the RPC server is initialized before the namenode data structures are initialized. This means that an RPC starts getting processed by the namenode before its data structures are consistent. The fix is to first initialize the namesystem and then start the RPC server.
> NFO org.apache.hadoop.ipc.Server: IPC Server handler 1 on 50000 call error: java.io.IOException: java.lang.NullPointerException
> java.io.IOException: java.lang.NullPointerException
> at org.apache.hadoop.dfs.NameNode.isDir(NameNode.java:438)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:339)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:564)
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.