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From "Dhruba Borthakur" <dhr...@yahoo-inc.com>
Subject RE: secondary namenode errors
Date Tue, 04 Sep 2007 16:41:43 GMT
I have already uploaded a patch for HADOOP-1076. If somebody can review this
patch, it can be committed.

Thanks,
dhruba

-----Original Message-----
From: ChaoChun Liang [mailto:ccliangnn@gmail.com] 
Sent: Tuesday, September 04, 2007 1:12 AM
To: hadoop-user@lucene.apache.org
Subject: Re: secondary namenode errors



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
> 

Hi,
   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
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:340)
	at org.apache.hadoop.ipc.Server$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.doCheckpoint(SecondaryNameNode.java:
261)
	at
org.apache.hadoop.dfs.SecondaryNameNode.run(SecondaryNameNode.java:190)
	at java.lang.Thread.run(Thread.java:619)

  Any suggestion to solve?

ChaoChun
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