We are starting to see a problem where one cache member is shunned. It used to 
happen every six weeks or so, but is not happening at least once a week.

We are running Hibernate 2.8 and the jcache version that comes with it. The 
jboss-cache.jar manifest says its version  is 1.1.1.

Our topology consists of two Tomcat servers running SuSE Linux Enterprise 
Server 9. Both servers have 4GB RAM and run dual Opterons in 64-bit mode, 
though one server is slightly faster than the other. The servers are directly 
connected to each other over a pair of dedicated ethernet ports. Connections to 
the web server from Tomcat take place over a separate ethernet port.

Once the error occurs, the Tomcat instance that shows the following errors in 
the logs goes to 100% CPU usage and must be restarted.

I have seen posts that recommended using the FD_SOCK protocol instead of FD in 
some cases, but am not sure if this applies to us. Also would upgrading the 
jboss-cache.jar, jboss-common.jar and jboss-system.jar to the ones from JBoss 
Cache 1.2.4SP2 be of use?

Thanks in advance, the relevant messages from my Tomcat log are below.

 - Richard

Here are the relevant log messages:


  | 2006-10-17 12:43:51,022  INFO [TP-Processor14] ActionFilter:653 - Handling 
request
  | 
  | 2006-10-17 12:44:59,214  WARN [UpHandler (FD)] FD:220 - I was suspected, 
but will not remove myself from membership (waiting for EXIT message)
  | 
  | 2006-10-17 12:44:59,249  WARN [UpHandler (GMS)] GMS:324 - 
checkSelfInclusion() failed, kingfishS11:5692 is not a member of view 
[gofishS11:15833|2] [gofishS11:15833]; discarding view
  | 
  | 2006-10-17 12:44:59,250  WARN [UpHandler (GMS)] GMS:333 - I 
(kingfishS11:5692) am being shunned, will leave and rejoin group (prev_members 
are [gofishS11:15833 kingfishS11:5692 ])
  | 
  | 2006-10-17 12:45:42,908  INFO [TP-Processor2] ActionFilter:653 - Handling 
request
  | 
  | 2006-10-17 12:45:43,008 ERROR [TP-Processor2] GroupRequest:178 - both corr 
and transport are null, cannot send group request
  | 
  | 2006-10-17 12:45:43,017 ERROR [TP-Processor2] ActionFilter:370 - Exception 
getting UserTransaction object to handle request 
net.sf.hibernate.cache.CacheException: org.jboss.util.NestedRuntimeException: 
rsp=sender=gofishS11:15833, retval=null, received=false, suspected=false; - 
nested throwable: (org.jboss.cache.lock.TimeoutException: 
rsp=sender=gofishS11:15833, retval=null, received=false, suspected=false)
  | net.sf.hibernate.cache.CacheException: 
org.jboss.util.NestedRuntimeException: rsp=sender=gofishS11:15833, retval=null, 
received=false, suspected=false; - nested throwable: 
(org.jboss.cache.lock.TimeoutException: rsp=sender=gofishS11:15833, 
retval=null, received=false, suspected=false)
  |         at net.sf.hibernate.cache.TreeCache.remove(TreeCache.java:44)
  |         at 
net.sf.hibernate.cache.TransactionalCache.remove(TransactionalCache.java:79)
  |         at net.sf.hibernate.impl.SessionImpl.refresh(SessionImpl.java:2195)
  |         at net.sf.hibernate.impl.SessionImpl.refresh(SessionImpl.java:2160)
  |         at 
com.ltoj.persistence.ServiceLocator.createUserTransaction(ServiceLocator.java:222)
  |         at 
com.ltoj.webapp.filter.ActionFilter.doFilter(ActionFilter.java:356)
  |         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
  | 

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