I have an application X that reads the messages from Topics in applications A and B. When A is shutdown, I keep getting messages in the log of X - "Trying to connect to JMS". This is expected. However, when B is shut down, I recieve a few "Trying to connect" messages and then I see "Reconnected to JMS" in the log of X. Also, if I now start B, the messages are not processed at all. I have to restart X to process all the pending messages. Here is the excerpt of the log of application X when application B is shutdown.Note the last statement. Also, please let me know if I can provide more info to troubleshoot. 2009-06-11 10:48:30,661 DEBUG [org.jnp.interfaces.NamingContext] Failed to connect to ApplicationB:1099 javax.naming.CommunicationException: Failed to connect to server otciq1.test.ps:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server otciq1.test.ps:1099 [Root exception is java.net.ConnectException: Connection refused]] at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:269) at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1385) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:594) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:587) at javax.naming.InitialContext.lookup(InitialContext.java:392) at org.jboss.ejb3.mdb.MDB.innerCreateTopic(MDB.java:443) at org.jboss.ejb3.mdb.MDB.innerCreate(MDB.java:342) at org.jboss.ejb3.mdb.MDB.innerStart(MDB.java:225) at org.jboss.ejb3.mdb.MDB$ExceptionListenerImpl.onException(MDB.java:1133) at org.jboss.mq.Connection$ExceptionListenerRunnable.run(Connection.java:1320) at java.lang.Thread.run(Thread.java:619) Caused by: javax.naming.ServiceUnavailableException: Failed to connect to server otciq1.test.ps:1099 [Root exception is java.net.ConnectException: Connection refused] at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:243) ... 10 more Caused by: java.net.ConnectException: Connection refused at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:519) at java.net.Socket.connect(Socket.java:469) at java.net.Socket.(Socket.java:366) at java.net.Socket.(Socket.java:267) at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:84) at org.jnp.interfaces.TimedSocketFactory.createSocket(TimedSocketFactory.java:77) at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:239) ... 10 more 2009-06-11 10:48:30,688 DEBUG [org.jboss.mq.referenceable.SpyConnectionFactoryObjectFactory] Extracting SpyConnectionFactory from reference 2009-06-11 10:48:30,689 DEBUG [org.jboss.mq.referenceable.SpyConnectionFactoryObjectFactory] The GenericConnectionFactory is: GenericConnectionFactory[server=org.jboss.mq.il.uil2.UILServerIL@e71d5e connectionProperties={ClientILService=org.jboss.mq.il.uil2.UILClientILService, UIL_TCPNODELAY_KEY=yes, UIL_CHUNKSIZE_KEY=1000000, UIL_CONNECTADDRESS_KEY=null, UIL_CONNECTPORT_KEY=0, UIL_SOTIMEOUT_KEY=120000, UIL_RECEIVE_REPLIES_KEY=No, UIL_ADDRESS_KEY=10.58.33.173, UIL_PORT_KEY=8093, PingPeriod=60000, UIL_BUFFERSIZE_KEY=2048}] 2009-06-11 10:48:30,689 DEBUG [org.jboss.jms.ConnectionFactoryHelper] using connection factory: org.jboss.mq.SpyXAConnectionFactory@1390efd 2009-06-11 10:48:30,689 DEBUG [org.jboss.jms.ConnectionFactoryHelper] using username/password: null/-- not shown -- 2009-06-11 10:48:30,690 DEBUG [org.jboss.mq.il.uil2.SocketManager] Begin ReadTask.run 2009-06-11 10:48:30,707 DEBUG [org.jboss.mq.il.uil2.SocketManager] Begin WriteTask.run 2009-06-11 10:48:30,715 DEBUG [org.jboss.mq.il.uil2.SocketManager] Created ObjectOutputStream 2009-06-11 10:48:30,717 DEBUG [org.jboss.mq.il.uil2.SocketManager] Created ObjectInputStream 2009-06-11 10:48:30,717 DEBUG [org.jboss.mq.il.uil2.UILClientILService] Starting 2009-06-11 10:48:30,719 DEBUG [org.jboss.jms.ConnectionFactoryHelper] created XATopicConnection: Connection@17243991[token=ConnectionToken:null/58330342c296b996c5d5b99b0e2903db rcvstate=STOPPED] 2009-06-11 10:48:30,719 DEBUG [org.jboss.ejb3.mdb.MDB] Using client id: pinkAlerts 2009-06-11 10:48:30,728 WARN [org.jboss.ejb3.mdb.MDB] Could not find the topic destination-jndi-name=topic/financialDocumentPost 2009-06-11 10:48:30,731 DEBUG [org.jboss.ejb3.mdb.MDB] Initialized with config org.jboss.ejb3.mdb.MDB@1f5438 2009-06-11 10:48:30,731 DEBUG [org.jboss.ejb3.mdb.DLQHandler] Starting DLQHandler 2009-06-11 10:48:30,733 DEBUG [org.jboss.ejb3.mdb.DLQHandler] Started DLQHandler 2009-06-11 10:48:30,734 INFO [org.jboss.ejb3.mdb.MDB] Reconnected to JMS provider Thanks Papiya View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4237063#... 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