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From Eric Bowman <ebow...@boboco.ie>
Subject Re: NoNode Exception?
Date Wed, 07 Oct 2009 16:11:29 GMT
I'd look in the zookeeper logs for more clues. We saw something similar
to this, and found OutOfMemoryErrors in the ZK logs.

Mark Vigeant wrote:
> So I said I'd tell you if the problem came up again, so here's the error that gets thrown
at me over and over again:
> 09/10/02 23:59:23 WARN zookeeper.ClientCnxn: Exception closing session 0x0 to sun.nio.ch.SelectionKeyImpl@92eb76
> java.io.IOException: Read error rc = -1 java.nio.DirectByteBuffer[pos=0 lim=4 cap=4]
> 	at org.apache.zookeeper.ClientCnxn$SendThread.doIO(ClientCnxn.java:653)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:897)
> 09/10/02 23:59:23 WARN zookeeper.ClientCnxn: Ignoring exception during shutdown input
> java.net.SocketException: Transport endpoint is not connected
> 	at sun.nio.ch.SocketChannelImpl.shutdown(Native Method)
> 	at sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:640)
> 	at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:360)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:951)
> 	at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:922
> This is actually different from what it was the other day. Any clue what's going on here?
> -----Original Message-----
> From: jdcryans@gmail.com [mailto:jdcryans@gmail.com] On Behalf Of Jean-Daniel Cryans
> Sent: Tuesday, October 06, 2009 11:54 AM
> To: hbase-user@hadoop.apache.org
> Subject: Re: NoNode Exception?
> Care to show us your configuration? Are you managing the zookeeper
> ensemble yourself or do you let HBase do it?
> Can I see a full stack trace along with some lines before and after?
> Try to get the first one, when things go awry.
> J-D
> On Tue, Oct 6, 2009 at 11:49 AM, Mark Vigeant
> <mark.vigeant@riskmetrics.com> wrote:
>> Yeah I made a data directory for zookeeper, so that can't be it.
>> And in the logs all I see are NoNodeExceptions. I reconfigured it so that zookeeper
was no longer in standalone mode but the error is still occurring. Perhaps I have to reformat
everything then configure it in distributed mode?
>> -----Original Message-----
>> From: jdcryans@gmail.com [mailto:jdcryans@gmail.com] On Behalf Of Jean-Daniel Cryans
>> Sent: Tuesday, October 06, 2009 11:06 AM
>> To: hbase-user@hadoop.apache.org
>> Subject: Re: NoNode Exception?
>> Mark,
>> By default the data is stored in /tmp which is cleared regularly, did
>> you change hbase.tmp.dir or hbase.zookeeper.property.dataDir?
>> Also do you get other exceptions in the master and regionserver logs?
>> J-D
>> On Tue, Oct 6, 2009 at 10:57 AM, Mark Vigeant
>> <mark.vigeant@riskmetrics.com> wrote:
>>> Hey-
>>> So I've been messing around with HBase 0.20.0 for the past couple of weeks on
some virtual machines (with ubuntu), and for whatever reason every week or so I get thrown
a ton of exceptions and have no idea what to do except format the nodes and reinstall everything.
Basically I get this :
>>> org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode
for /hbase/master
>>> but it's silly because I know the master is running (when typing jps it says
HMaster and HQuorumPeer are running fine) so I was wondering if there was a patch or something
that fixes this... I don't think this is because of something I did because it occurs randomly.
I don't know. I throw myself at the mercy of the listserve.
>>> Mark Vigeant
>>> RiskMetrics Group, Inc.

Eric Bowman
Boboco Ltd

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