See Thread at: http://www.techienuggets.com/Detail?tx=44138 Posted on behalf of a User I'm repeatedly getting the following error in my server log. Running JBoss 4.2.1.GA The server is still running and handling requests but my server log is being pounded with this error message. Any clues? 2008-07-13 12:01:10,005 ERROR [org.jgroups.protocols.UDP] failed sending message to null (0 bytes) java.net.NoRouteToHostException: No route to host: Datagram send failed at java.net.PlainDatagramSocketImpl.send(Native Method) at java.net.DatagramSocket.send(DatagramSocket.java:612) at org.jgroups.protocols.UDP._send(UDP.java:316) at org.jgroups.protocols.UDP.sendToAllMembers(UDP.java:286) at org.jgroups.protocols.TP.doSend(TP.java:937) at org.jgroups.protocols.TP.send(TP.java:926) at org.jgroups.protocols.TP.down(TP.java:712) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:499) at org.jgroups.stack.Protocol.passDown(Protocol.java:533) at org.jgroups.protocols.Discovery.down(Discovery.java:333) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:499) at org.jgroups.stack.Protocol.passDown(Protocol.java:533) at org.jgroups.protocols.MERGE2.down(MERGE2.java:207) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:499) at org.jgroups.stack.Protocol.passDown(Protocol.java:533) at org.jgroups.protocols.FD_SOCK.down(FD_SOCK.java:408) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:499) at org.jgroups.stack.Protocol.passDown(Protocol.java:533) at org.jgroups.protocols.FD.down(FD.java:339) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:499) at org.jgroups.stack.Protocol.passDown(Protocol.java:533) at org.jgroups.stack.Protocol.down(Protocol.java:559) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:499) at org.jgroups.stack.Protocol.passDown(Protocol.java:533) at org.jgroups.protocols.pbcast.NAKACK.send(NAKACK.java:622) at org.jgroups.protocols.pbcast.NAKACK.down(NAKACK.java:409) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:499) at org.jgroups.stack.Protocol.passDown(Protocol.java:533) at org.jgroups.protocols.UNICAST.down(UNICAST.java:391) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:499) at org.jgroups.stack.Protocol.passDown(Protocol.java:533) at org.jgroups.protocols.pbcast.STABLE.sendStableMessage(STABLE.java:581) at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:246) at org.jgroups.stack.Protocol.receiveUpEvent(Protocol.java:470) at org.jgroups.stack.Protocol.passUp(Protocol.java:520) at org.jgroups.protocols.UNICAST.up(UNICAST.java:259) at org.jgroups.stack.Protocol.receiveUpEvent(Protocol.java:470) at org.jgroups.stack.Protocol.passUp(Protocol.java:520) at org.jgroups.protocols.pbcast.NAKACK.down(NAKACK.java:423) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:499) at org.jgroups.stack.Protocol.passDown(Protocol.java:533) at org.jgroups.protocols.UNICAST.down(UNICAST.java:391) at org.jgroups.stack.Protocol.receiveDownEvent(Protocol.java:499) at org.jgroups.stack.Protocol.passDown(Protocol.java:533) at org.jgroups.protocols.pbcast.STABLE$StableTask.run(STABLE.java:783) at org.jgroups.util.TimeScheduler$TaskWrapper.run(TimeScheduler.java:204) at java.util.TimerThread.mainLoop(Timer.java:512) at java.util.TimerThread.run(Timer.java:462)