Hi,

I have managed to set up JBoss servers before whitout any problem, but i am currently experiencing a few issues. 2 Servers recently had a fresh Fedora Core 5 install, and now i cannot get JBoss to start without errors (related to UDP multicasting).

The current exception i get is:

java.lang.Exception: dest=/233.3.3.21:45551 (52 bytes)
 at org.jgroups.protocols.UDP._send(UDP.java:356)
 at org.jgroups.protocols.UDP.sendToAllMembers(UDP.java:300)
 at org.jgroups.protocols.TP.doSend(TP.java:938)
 at org.jgroups.protocols.TP.send(TP.java:927)
 at org.jgroups.protocols.TP.down(TP.java:716)
 at org.jgroups.stack.DownHandler.run(Protocol.java:120)
Caused by: java.io.IOException: Network is unreachable
 at java.net.PlainDatagramSocketImpl.send(Native Method)
 at java.net.DatagramSocket.send(DatagramSocket.java:612)
 at org.jgroups.protocols.UDP._send(UDP.java:330)
 ... 5 more
2006-11-07 14:52:03,091 ERROR [org.jgroups.protocols.UDP] failed sending message
java.lang.Exception: dest=/233.3.3.21:45551 (52 bytes)
 at org.jgroups.protocols.UDP._send(UDP.java:356)
 at org.jgroups.protocols.UDP.sendToAllMembers(UDP.java:300)
 at org.jgroups.protocols.TP.doSend(TP.java:938)
 at org.jgroups.protocols.TP.send(TP.java:927)
 at org.jgroups.protocols.TP.down(TP.java:716)
 at org.jgroups.stack.DownHandler.run(Protocol.java:120)
Caused by: java.io.IOException: Network is unreachable
 at java.net.PlainDatagramSocketImpl.send(Native Method)
 at java.net.DatagramSocket.send(DatagramSocket.java:612)
 at org.jgroups.protocols.UDP._send(UDP.java:330)
 ... 5 more

I am pretty certain multicasting is enabled as i have the following entry in /sbin/ifconfig

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

I am using JBoss 4.0.4GA along with Java 1.5.0_08

Does anyone have an idea what is causing the problem ??

Thanks in advance,

Andy