CA IdentityMinder JBoss Clustering Question

IDM Version - CA IdentityMinder12.6 Sp2
App Server - Jboss 5.1 GA
OS - ReHat Linux 6.4

I had 2 IDM's(1 & 2) running in a Cluster mode without any issue. As part of the new application on-boarding, I had to add 2 more IDM's (3 & 4)to the existing cluster. I installed it and configured it succesfully. I am able to start 3 and 4 in standalone mode without any issue.

When i start all 4 of them in cluster, 2 of them are getting started and 2 of them are failing with the deployment error. I tried the below sequences, either way i am able to start only one set of the servers,

- if i start, IDM-1 & 2 in clsuter and 3 & 4 fails with deployment error.
- if i start, IDM-3 & 4 in clsuter and 1 & 2 fails with deployment error.

My JBoss servers are TCP clustering enabled due to the environment limitations. Below is the command which i use it for starting JBoss servers.


/opt/jboss/bin/run.sh -c all -Djboss.default.jgroups.stack=tcp -Djgroups.tcpping.initial_hosts=sso-idm1[7600],sso-idm2[7600],sso-idm3[7600],sso-idm4[7600] &

Do i need to follow any specific sequence to start Jboss servers or is there any diff set of command do i need to follow ?

Any help is very much appreciated.