JBossCache Ticket Registry performance under load?

[Brian Donnelly]

Hi all,

We're getting ready at UC Davis to switch to a JBossCache Clustered
configuration for our CAS installation.  I have been load testing two
Redhat EL 5 clustered nodes running CAS 3.0.6 using the default
JBossCache implementation, (UDP multicast.)

I've been using JMeter to generate ~7 login actions per second.  Both
clustered servers perform fine for several hours.  Somewhere in the
third hour of testing, I start seeing the following errors in the logs:

2007-07-18 13:43:54,813 ERROR
[org.jasig.cas.ticket.registry.JBossCacheTicketRegistry] -
<org.jboss.cache.ReplicationException: rsp=sender=169.237.104.235:53768,
retval=null, received=false, suspected=false>

and 

2007-07-18 13:48:33,448 ERROR
[org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/cas].[cas]] - <Servlet.service() for servlet cas threw exception>

These start piling up until both servers stop responding to incoming
requests.  A restart is required to restore service.

Has anyone else encountered errors of this type in their testing of the
JBossCache registry?

Thanks,

Brian Donnelly
-- 
Brian Donnelly
University of Calfornia, Davis
Information and Educational Technology
Middleware Team
(530) 754-5909
bdonnelly at ucdavis.edu