[jboss-user] [Clustering/JBoss] - Re: Clustering / Multicast routing

[bstansberry@jboss.com]

If the IP passed to -b is not the one you want JGroups to use, specifying it in cluster-service.xml will not work unless you are using JGroups 2.2.8 or later and you pass a special 'ignore.bind.address' system property to java.  So, you have two choices:

1) Use JGroups 2.2.8 or later (which is a good idea anyway), and

a) in cluster-service.xml


  | <UDP bind_addr="172.25.2.14" mcast_addr="${jboss.partition.udpGroup:228.1.2.3}" mcast_port="45566" ...... />
  | 

b) to start JBoss:

su -l jboss -c '/apps/jboss/bin/run.sh -c foo.bar.com -b 172.25.1.52 -Dignore.bind.address=true -g foo.bar.com -u 224.10.10.10 > /dev/null 2> /dev/null &'


OR 

2) With any JGroups version:

su -l jboss -c '/apps/jboss/bin/run.sh -c foo.bar.com -b 172.25.1.52 -Dbind.address=172.25.2.14 -g foo.bar.com -u 224.10.10.10 > /dev/null 2> /dev/null &'

No need to set the bind_addr in cluster-service.xml with option 2.


IMO, option 2 is easier.

Re: running 50 separate instances per machine, all on separate partitions, you can do that and you can use the same -b  and -Dbind.address values for all 50.  But you must use separate values for:

1) -g (aka -Djboss.partition.name)
2) -u
3) the value for mcast_port in cluster-service.xml's UDP. Recommend you create a system property for this value and pass it in your startup command via -D.


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