I just upgraded to 4.2.0/1.3.0GA and left the server running overnight, wth a couple of relatively heavy clients sending messages (approx 10,000 messages per client), and one receiver with a listener registered on my queue. When I looked this morning, my client has nearly 300 "Timer-nnn" threads running, and the JBoss server.log is full of these: 2007-07-03 00:29:32,971 DEBUG [org.jboss.remoting.transport.bisocket.BisocketClientInvoker] Unable to send ping: trying again 4936 2007-07-03 00:29:32,971 DEBUG [org.jboss.remoting.transport.bisocket.BisocketClientInvoker] Unable to send ping: trying again 4937 2007-07-03 00:29:32,971 DEBUG [org.jboss.remoting.transport.bisocket.BisocketClientInvoker] Unable to send ping: trying again 4938 2007-07-03 00:29:32,971 DEBUG [org.jboss.remoting.transport.bisocket.BisocketClientInvoker] Unable to send ping: trying again 4939 2007-07-03 00:29:32,971 DEBUG [org.jboss.remoting.transport.bisocket.BisocketClientInvoker] Unable to send ping: trying again 4940 2007-07-03 00:29:32,971 DEBUG [org.jboss.remoting.transport.bisocket.BisocketClientInvoker] Unable to send ping: trying again 4941 2007-07-03 00:29:32,971 DEBUG [org.jboss.remoting.transport.bisocket.BisocketClientInvoker] Unable to send ping: trying again 4942 2007-07-03 00:29:33,032 DEBUG [org.jboss.remoting.transport.bisocket.BisocketClientInvoker] Unable to send ping: trying again 4943 2007-07-03 00:29:33,032 DEBUG [org.jboss.remoting.transport.bisocket.BisocketClientInvoker] Unable to send ping: trying again 4944 2007-07-03 00:29:33,032 DEBUG [org.jboss.remoting.transport.bisocket.BisocketClientInvoker] Unable to send ping: trying again 4945 2007-07-03 00:29:33,032 WARN [org.jboss.remoting.transport.bisocket.BisocketClientInvoker] Unable to send ping: shutting down PingTimerTask 4946 java.net.SocketException: Write failed: Broken pipe 4947 at jrockit.net.SocketNativeIO.writeBytesPinned(Native Method) 4948 at jrockit.net.SocketNativeIO.socketWrite(Unknown Source) 4949 at java.net.SocketOutputStream.socketWrite0(SocketOutputStream.java) 4950 at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92) 4951 at java.net.SocketOutputStream.write(SocketOutputStream.java:115) 4952 at org.jboss.remoting.transport.bisocket.BisocketClientInvoker$PingTimerTask.run(BisocketClientInvoker.java:497) 4953 at java.util.TimerThread.mainLoop(Timer.java:512) 4954 at java.util.TimerThread.run(Timer.java:462) Presumably the server is using the ping to test the health of the registered client - but if this ping fails, it shouldn't leave an open thread in my client? It looks like I'm going to have to roll back to 1.0.1 again, which is what I had to do when I tried 1.2.0 (for a different reason). This is really disappointing for me. I'm not using clustering at this stage - should I just be happy sticking with 1.0.1? I was of the impression that the newer releases offered efficiencies and performance gains, but if this is negligible, I'm happy to stick with what works for me. I'm on an x86_64 box with 4Gb RAM running Suse SLES 9, with JBoss running on JRockit 6.0 - R27.2.0-131-78843-1.6.0-20070320-1507-linux-x86_64. Any help greatly appreciated. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4059847#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...