Alex,
[snip]
Of particular interest is:
DEBUG jgroups.protocols.UDP sending msg to null
(src=192.168.0.128:32962), headers are {PING=[PING:
type=GET_MBRS_REQ, arg=null], UDP=[channel_name=myDB]}
The group communication will dynamically use a UDP port. I recommend
that you open all UDP traffic between the cluster machines (you can
reject packets coming from any other machine). Unless you force a port
number in JGroups config file, the port number will be chosen dynamically.
So it's sending a message to "null". Perhaps an IP address or
identifier of some sort should be there instead of null....
Null as a destination in JGroups means all members of the groups.
Ok, I've got it working. I could have sworn I tried this before, but
I've just tried disabling the firewall completely, and it works now.
So it was a networking problem.
What ports should I open to allow these comms? They're around the
32000 range it seems..
See my previous comment. Either you fix a port number if JGroups config
file (but if the JVM crashes uncleanly, you may not be able to reuse the
port and fail to restart without a reboot). Otherwise just open UDP traffic.
You are getting there!
Emmanuel
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