Hello, gurus! Tim Fox (Messaging Lead) adviced me to post this problem on remoting forum. I am using JBoss Messaging 1.4.0.SP3 on Jboss AS 4.2.1 GA (non-clustered installation). Jboss messaging uses remoting 2.2.2 SP4 (it's requirements in release notes for messaging). The JBoss Messaging configuration is defualt. It works excellently during about first 24 hours. After this unexpected error occurs periodically: 2008-04-24 16:14:20,486 DEBUG [org.jboss.remoting.ConnectionNotifier] Server connection lost to client session id = 117av-jr2kld-ffc8mznf-1-ffc8q2ro-7 | 2008-04-24 16:14:20,486 ERROR [org.jboss.remoting.ConnectionNotifier] Error notifying connection listeners of lost client connection. | java.lang.NullPointerException | at org.jboss.remoting.ConnectionNotifier.connectionLost(ConnectionNotifier.java:50) | at org.jboss.remoting.Lease.notifyClientLost(Lease.java:211) | at org.jboss.remoting.Lease.access$500(Lease.java:39) | at org.jboss.remoting.Lease$LeaseTimerTask.run(Lease.java:249) | at java.util.TimerThread.mainLoop(Timer.java:512) | at java.util.TimerThread.run(Timer.java:462) | | | After this, sending/consuming of messages didn't work at all :(. There are no errors on client side. All messages are holding in queues. Das somebody have any idea about this? Thanks in advance. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4147531#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...