jboss/clustering

[sneha]

Hi Am new to JBOSS server. I need help on JBOSS/clustering. please help me

sneha

[slaboure]

yes, no problem, wait a minute....

... (abracadabra) ...

... OK, you should be super-smart now.




(And if it doesn't work, you may try to read the JBoss clustering documentation first. But that may fail as well.)

[mud_slinger]

. . . because the documentation is crap!

[slaboure]

which part? Feedback welcome.

Cheers,


sacha

[jleveille]

Ok. Here is some constructive feedback ...

I have been playing around with clustering a bit and happened upon something useful to the newbie and also useful if you want to tweak the cluster-service.xml distributed with JBoss to be a bit nicer for others just starting out.

I followed the directions at
http://www.jboss.org/online-manual/HTML/ch11s144.html
and it was, indeed, very simple to just plop cluster-service.xml into my deploy directory and go into cluster mode. However, to my surprise, I joined a cluster that was already running on my company internal network. Ooops, sorry guys, didn't mean to crash your party ...

So I started trying to figure out how to define cluster membership or at least segregate loosely defined clusters. After tromping through the source code I found that I could put

MyTestCluster

in the MBean definitions for three of the four beans in cluster-service.xml and my server was deployed with clustering that did not interfere with the other cluster on my company network. Woohoo!

My suggestion is that you update the stock cluster-service.xml to have these attributes in the proper locations with a note about changing the name to avoid colliding with others. To the newbies out there -- I suggest that you edit cluster-service.xml and put the above line of XML inside the MBean defintion for the ClusterPartition, HASessionStateService, and HANamingService beans. Then change all occurrences of "MyTestCluster" to some name you choose.

[slaboure]

Hello John,

Thank you for your constructive comment. You are right, and it is on the TODO list for ALL JBoss services: we will put, in the service definitions, all possible attributes with their current default values so it is easier:
- to understand the current behaviour
- to know what can be changed
- to change values

If you give me a totally processed cluster-service.xml file, I will commit it though.

Thank you. Cheers,



sacha