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From ChaoChun Liang <cclian...@gmail.com>
Subject Re: secondary namenode errors
Date Tue, 04 Sep 2007 08:12:09 GMT

Koji Noguchi wrote:
> Joydeep,
> I think you're hitting this bug.
> http://issues.apache.org/jira/browse/HADOOP-1076
> In any case, as Raghu suggested, please use 0.13.1 and not 0.13.
> Koji

   I met the similar problem under 0.14.0 when I increase the slave nodes
from 2 to 3.
   All tasks work fine in 2-nodes cluster, but will hang in reduce process
in the 3-nodes cluster.
   My logs show as following for each *.secondarynamenode.* logs. 

2007-09-04 16:02:33,390 ERROR org.apache.hadoop.dfs.NameNode.Secondary:
Exception in doCheckpoint:
2007-09-04 16:02:33,390 ERROR org.apache.hadoop.dfs.NameNode.Secondary:
org.apache.hadoop.ipc.RemoteException: java.io.IOException: Attempt to roll
edit log but edits.new exists
	at org.apache.hadoop.dfs.FSEditLog.rollEditLog(FSEditLog.java:582)
	at org.apache.hadoop.dfs.FSNamesystem.rollEditLog(FSNamesystem.java:3510)
	at org.apache.hadoop.dfs.NameNode.rollEditLog(NameNode.java:553)
	at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:340)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:566)

	at org.apache.hadoop.ipc.Client.call(Client.java:470)
	at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:165)
	at org.apache.hadoop.dfs.$Proxy0.rollEditLog(Unknown Source)
	at org.apache.hadoop.dfs.SecondaryNameNode.run(SecondaryNameNode.java:190)
	at java.lang.Thread.run(Thread.java:619)

  Any suggestion to solve?

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