Multicasting was ok and the server answered to a "ping 230.0.0.4".
The problem persisted on SuSE Linux 9.1 kernel 2.6.4-52-default, but not on
WinXP.
I had a look in the source org.jboss.ha.jndi.DetachedHANamingService.java,
class AutomaticDiscovery, method start() and found two issues.
The original code:
stopping = false;
| // Use the jndi bind address if there is no discovery address
| if (discoveryBindAddress != null)
| discoveryBindAddress = bindAddress;
| InetSocketAddress bindAddr = new
InetSocketAddress(discoveryBindAddress,
| adGroupPort);
| socket = new MulticastSocket(bindAddr);
| socket.setTimeToLive(autoDiscoveryTTL);
| group = InetAddress.getByName(adGroupAddress);
| socket.joinGroup(group);
|
First, discoveryBindAddress should likely be tested as equal to null. It makes
no sense to set it to bindAddr if one already exists.
Second, there seems to be a bug in the constructor of MulticastSocket when
instantiated with an InetAddress. I changed the code to first instantiate with
a port number and then set the interface in a second call.
Changed code:
stopping = false;
| // Use the jndi bind address if there is no discovery address
| if (discoveryBindAddress == null)
| discoveryBindAddress = bindAddress;
| socket = new MulticastSocket(adGroupPort);
| socket.setInterface(discoveryBindAddress);
| socket.setTimeToLive(autoDiscoveryTTL);
| group = InetAddress.getByName(adGroupAddress);
| socket.joinGroup(group);
|
This code works on the Linux server. I had not the time to test other
platforms. Please check this out.
Mathias
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