Found existing proxy warning in JMS Grid logs

Hi All,
I am currently getting issues with my JMS Grid cluster. I have two AIX machines linked as a cluster of two JMS Grid instances. I then have a total of three JCAPS logical hosts connecting into this Grid cluster.
What seems to be happening is that the JMS Grids (one or both at the same time) lose site of one and other (and perhaps the logical hosts too) which is causing them to eventually hang and stop processing message requests.
In the logs we are seeing different errors on different occations. I have included the logs from the hanging grid for the last instance of the failure. This time it is showing the "Found Existing Proxy" warning. Last time it was a connection timeout.
We are already tracking the network to check for timeout issues and network traffic problems. If anyone has any ideas on what causes this "Found Existing Proxy" I'd appreciate it. I can't find any reference to it on the forums sites for JMS.
Kind regards
Simon
[#|2009-01-17 19:42:19,036| WARN|com.spirit.wms.ClusterManager|ThreadName=/166.65.46.121:50651=>60607 D(CD->) ;|found existing proxy for ID:wncptip202
-1297.285319944908.1673840|#]

I had a similar issue to this. It turned out the tns listener had already started on the VIP address on the first node.
[root@rac-1 home]# netstat -nltp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 172.25.15.132:1521 0.0.0.0:* LISTEN 18253/tnslsnr
[root@rac-1 home]# Not sure how this got started since the only program I had run was the Grid installer, however killing this process and retrying the Oracle Net Configuration Assistant step allowed me to continue.

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Edited by: Abhinav on Jan 1, 2013 12:36 PM

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