Hello all, 

we have some strange problems in our standalone application with our 
JbossCache/JGroups implementation. 
The application is working fine for a while and then the application get stuck, 
and each put in the tree-Cache will lead to a ReplicationException (see below).
The port that is used (in this case 33146) was printed in the log file as the 
first output of the GMS protocol. 
----------------
GMS: address is ?.
----------------
Some more GMS outputs like this are available.

After this moment the cache is not be able to reinitialized. 

After some minutes in one server we see some logs entries like:

(caller=Thread[Timer-0,5,main], lock info: read owners=[Thread[UpHandler 
(GMS),5,JGroups threads]] (activeReaders=1, activeWriter=null, 
waitingReaders=0, waitingWriters=0, waitingUpgrader=0))2006-11-27 19:00:28,145 
ERROR org.jgroups.protocols.pbcast.GMS:446 up_handler thread for GMS was 
interrupted (in order to be terminated), but is still alive2006-11-27 
 
and after a while only entries like: 

19:01:06,320 ERROR org.jgroups.protocols.pbcast.GMS:845 coords or merge_id == 
null

A restart of a single server is not helping so that in the end all servers have 
to be restarted.

We are using the following versions for JGroups and JBoss Cache:
JGroups-2.4.0
JBossCache-1.4.0.SP1
JDK:JBossCache-1.4.0.SP1

The JGroups configuration is the following:
**************************************************************************************
<UDP mcast_addr="228.1.2.3" mcast_port="45566" ip_ttl="64" ip_mcast="true"
mcast_send_buf_size="150000" mcast_recv_buf_size="80000" 
ucast_send_buf_size="150000"
ucast_recv_buf_size="80000" loopback="false" />
<PING timeout="2000" num_initial_members="3" up_thread="false" 
down_thread="false" />
<MERGE2 min_interval="10000" max_interval="20000" />
<FD shun="true" up_thread="true" down_thread="true" />
<VERIFY_SUSPECT timeout="1500" up_thread="false" down_thread="false" />
<pbcast.NAKACK gc_lag="50" max_xmit_size="8192" 
retransmit_timeout="600,1200,2400,4800" up_thread="false" down_thread="false"/>
<UNICAST timeout="600,1200,2400" window_size="100" min_threshold="10" 
down_thread="false" />
<pbcast.STABLE desired_avg_gossip="20000" up_thread="false" down_thread="false" 
/>
<FRAG frag_size="8192" down_thread="false" up_thread="false" />
<pbcast.GMS join_timeout="5000" join_retry_timeout="2000" shun="true" 
print_local_addr="true" />
<pbcast.STATE_TRANSFER up_thread="false" down_thread="false" />

Cached Exception:
***************************************************************************************************************
2006-11-27 18:39:23,095 FATAL com.fmi.mapserver.licence.LicencedKeysSingleton:? 
stack: 520E16:CacheException in enableAccessCacheException 
rsp=sender=10.160.33.18:33146, retval=null, received=false, suspected=false
org.jboss.cache.ReplicationException: rsp=sender=10.160.33.18:33146, 
retval=null, received=false, suspected=false
        at org.jboss.cache.TreeCache.callRemoteMethods(TreeCache.java:4191)
        at org.jboss.cache.TreeCache.callRemoteMethods(TreeCache.java:4114)
        at org.jboss.cache.TreeCache.callRemoteMethods(TreeCache.java:4215)
        at 
org.jboss.cache.interceptors.BaseRpcInterceptor.replicateCall(BaseRpcInterceptor.java:110)
        at 
org.jboss.cache.interceptors.BaseRpcInterceptor.replicateCall(BaseRpcInterceptor.java:88)
        at 
org.jboss.cache.interceptors.ReplicationInterceptor.handleReplicatedMethod(ReplicationInterceptor.java:119)
        at 
org.jboss.cache.interceptors.ReplicationInterceptor.invoke(ReplicationInterceptor.java:83)
        at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:68)
        at 
org.jboss.cache.interceptors.TxInterceptor.handleNonTxMethod(TxInterceptor.java:345)
        at 
org.jboss.cache.interceptors.TxInterceptor.invoke(TxInterceptor.java:156)
        at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:68)
        at 
org.jboss.cache.interceptors.CacheMgmtInterceptor.invoke(CacheMgmtInterceptor.java:157)
        at org.jboss.cache.TreeCache.invokeMethod(TreeCache.java:5520)
        at org.jboss.cache.TreeCache.put(TreeCache.java:3678)
        at org.jboss.cache.TreeCache.put(TreeCache.java:3616)
        at com.fmi.mapserver.licence.LicencedKeysSingleton.enableAccess(Unknown 
Source)
        at com.fmi.mapserver.action.InitAccessAction.execute(Unknown Source)
        at 
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
        at 
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
        at 
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
        at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
        at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
        at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
        at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
        at 
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
        at 
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
        at 
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
        at 
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
        at java.lang.Thread.run(Thread.java:595)
Caused by: org.jboss.cache.lock.TimeoutException: Response timed out: 
sender=10.160.33.18:33146, retval=null, received=false, suspected=false
        at org.jboss.cache.TreeCache.callRemoteMethods(TreeCache.java:4189)
        ... 36 more

Have anybody any idea ? 

Jochen


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