We are using JBM 1.4.2 GA SP1 with JBoss 4.2 GA. We are hosting our jboss servers on Solaris 10 (4 processors /8 GB memory). We do not persist messages more than 30-40 at a time. We also use JMS transactions for message rollback within session beans. Some of the message consumers are local MDBs and some of them are remote custom JMS clients. The remote clients are beyond a firewall and we have to refresh the connections between the client and JBM every 30 minutes. We are noticing that the JBoss server is gradually slowing down as more messages are processed and after about 3-4 weeks it tries to consume more than 100% of the cpu resources and crashes. We have checked with JProbe that there are no memory leak and also tuned the JVM with these parameters -Xms2048m -Xmx2048m -server -Dsun.rmi.dgc.client.gcInterval=1800000 -Dsun.rmi.dgc.server.gcInterval=1800000 -XX:MaxPermSize=768m -XX:+UseParallelGC -X X:ParallelGCThreads=4 -XX:NewRatio=1 -XX:SurvivorRatio=12 -XX:+UseLargePages -verb ose:gc -XX:+PrintGCDetails" We also see this kind of messages before crash javax.jms.JMSException: Could not create a session: org.jboss.resource.JBossResourceExcept ion: Could not enlist in transaction on entering meta-aware object!; - nested throwable: (java.lang.IllegalStateException: Transaction TransactionImple < ac, BasicAction: ad7d148:b3f9:49ff9638:c7b9 status: ActionStatus.ABORTED > is not active STATUS_ROLLEDBACK) 2009-05-13 05:08:51,229 DEBUG [com.arjuna.ats.arjuna.logging.arjLogger] Periodic recovery - second pass <Wed, 13 May 2009 05:08:51> 2009-05-13 05:08:51,367 ERROR [org.jboss.ejb.plugins.LogInterceptor] TransactionRolledbackLocalException in method: public abstract java.lang.String ebond.co mmon.XMLCommunicationHandlerLocal.putToWaitingQueue(java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String), causedBy: java.lang.IllegalStateException: [com.arjuna.ats.internal.jta.transaction.arjunacore.inactive] [com.arjuna.ats.internal.jta.transaction.arjunacore.inactive] The transaction is not active! Any help would be appreciated. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4232069#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...