[jboss-user] JGroups error -- how to config?

[John Zorko]

Hello, all ...

I've 2 JBoss apps that communicate with a central broker app via  
JGroups.  One app running on one host communicates, but the other app  
does not.  I'm new to JBoss / JGroups (i'm a longtime C++ developer  
who recently inherited this codebase), so any help is appreciated.   
These are the errors I see in the log of the app that does not  
communicate:

2008-03-28 15:29:11,881 WARN  [org.jgroups.protocols.pbcast.GMS] merge  
responses from subgroup coordinators <= 1 ([]). Cancelling merge
2008-03-28 15:29:11,881 ERROR [org.jgroups.protocols.pbcast.GMS]  
coords or merge_id == null
2008-03-28 15:29:11,881 ERROR [org.jgroups.protocols.pbcast.GMS]  
coords or merge_id == null

2008-03-28 16:44:30,180 ERROR [org.jgroups.protocols.pbcast.GMS]  
merge_id ([216.239.XXX.XXX:9900|1206745285182]) or this.merge_id  
(null) is null (sender=10.15.XXX.XXX:9900).

If someone would teach me how to fish, i'd appreciate it.  This app  
used to communicate, but then the machine died and I had to install it  
on another, and ever since, the above messages have appeared in the  
log.  What configuration attributes for JBoss / JGroups should I be  
looking at to solve this problem?

Regards,

John

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