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From Patrick Hunt <ph...@apache.org>
Subject Re: Exception causing close of session
Date Thu, 26 Aug 2010 23:05:55 GMT
 > Client has seen zxid 0xfa4 our last zxid is 0x42

Someone reset the zk server database without restarting the clients. As 
a result the client is "forward" in time relative to the cluster.

Patrick

On 08/26/2010 04:03 PM, Ted Yu wrote:
> Hi,
> zookeeper-3.2.2 is used out of HBase 0.20.5
>
> Linux sjc1-.com 2.6.18-92.el5 #1 SMP Tue Jun 10 18:51:06 EDT 2008 x86_64
> x86_64 x86_64 GNU/Linux
>
> In hbase-hadoop-zookeeper-sjc1-cml-grid00.log, I see a lot of the following:
>
> 2010-08-26 22:58:01,930 INFO org.apache.zookeeper.server.NIOServerCnxn:
> closing session:0x0 NIOServerCnxn: java.nio.channels.SocketChannel[connected
> local=/10.201.9.40:2181 remote=/10.201.9.22:63316]
> 2010-08-26 22:58:02,097 INFO org.apache.zookeeper.server.NIOServerCnxn:
> Connected to /10.201.9.22:63317 lastZxid 4004
> 2010-08-26 22:58:02,097 WARN org.apache.zookeeper.server.NIOServerCnxn:
> Client has seen zxid 0xfa4 our last zxid is 0x42
> 2010-08-26 22:58:02,097 WARN org.apache.zookeeper.server.NIOServerCnxn:
> Exception causing close of session 0x0 due to java.io.IOException: Client
> has seen zxid 0xfa4 our last zxid is 0x42
>
> If you can shed some thought on root cause, that would be great.
>

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