We are running jgroups 2.3 and jboss cache 1.2.4.SP2 on Red Hat Linux
Enterprise Application Server 4r3. Our jgroups is setup with UDP and tree cache
is in replicated synch mode. Sometimes when we access the cache, on both put
and get, it does not respond. At the same time that the cache stop responding,
all the requests to our own jgroup channels also timeout. The JVM dumps below
were taken at the time this occurred. This is a high transactional live
environment and we would appreciate any assistance.
Dump 1
"http-0.0.0.0-8906-10" daemon prio=1 tid=0x0000002c5e0c7a40 nid=0x7b41 in
Object.wait() [0x0000000044622000..0x0000000044623db0] at
java.lang.Object.wait(Native Method) - waiting on <0x0000002bdf0898c8> (a
java.util.HashMap) at
org.jgroups.blocks.GroupRequest.doExecute(GroupRequest.java:492) - locked <
0x0000002bdf0898c8> (a java.util.HashMap) at
org.jgroups.blocks.GroupRequest.execute(GroupRequest.java:188) at
org.jgroups.blocks.MessageDispatcher.castMessage(MessageDispatcher.java:417)
at org.jgroups.blocks.RpcDispatcher.callRemoteMethods(RpcDispatcher.java:165)
at org.jboss.cache.TreeCache.callRemoteMethods(TreeCache.java:3327)
at org.jboss.cache.TreeCache.callRemoteMethods(TreeCache.java:3357) at
org.jboss.cache.interceptors.ReplicationInterceptor.handleReplicatedMethod(ReplicationInterceptor.java:122)
at
org.jboss.cache.interceptors.ReplicationInterceptor.invoke(ReplicationInterceptor.java:87)
at org.jboss.cache.TreeCache.invokeMethod(TreeCache.java:4172) at
org.jboss.cache.TreeCache.put(TreeCache.java:2914) at
org.jboss.cache.TreeCache.put(TreeCache.java:2855) at
sun.reflect.GeneratedMethodAccessor162.invoke(Unknown Source) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:2!
5) at java.lang.reflect.Method.invoke(Method.java:585) at
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80) at
org.jboss.mx.server.Invocation.invoke(Invocation.java:72) at
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:245)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
at mammoth.cache.TreeCacheAOP.put(TreeCacheAOP.java:83)
..Our application code starts here
Dump 2
"http-0.0.0.0-8906-10" daemon prio=1 tid=0x0000002c5e0c7a40 nid=0x7b41
waiting for monitor entry [0x0000000044622000..0x0000000044623db0] at
mammoth.cache.TreeCacheAOP.put(TreeCacheAOP.java:81) - waiting to lock
<0x0000002ae6454350> (a mammoth.cache.TreeCacheAOP)
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