[ http://jira.jboss.com/jira/browse/JBAS-35?page=comments#action_12310889 ]
     
Ovidiu Feodorov commented on JBAS-35:
-------------------------------------

For both 4.0.0 and 4.0.1RC2 I deployed a simple singleton that makes it obvious 
in the logs when it is started and stopped. I tried the following scenarios 
(for both versions):

- Orderly shut down (Ctrl-C).
- Disabled the network interface on the master and then re-enabled it.
- Pulled the network cable on the master and then re-connected it. 

I all six cases, the singleton was undeployed/deployed correctly, the healed 
partition running just only one singleton in the end. That doesn't prove too 
much tough, an unforeseen race condition is always possible. I could spend more 
time analyzing the theroretical algorithm the master election is based upon ... 

The new JBoss Messaging won't use a singleton anymore, but we must have a 
reliable generic singleton mechanism. 

> InvalidDestinationException after Cluster Master failover
> ---------------------------------------------------------
>
>          Key: JBAS-35
>          URL: http://jira.jboss.com/jira/browse/JBAS-35
>      Project: JBoss Application Server
>         Type: Bug
>   Components: Clustering
>     Versions:  JBossAS-3.2.5 Final
>     Reporter: Scott M Stark
>     Assignee: Ovidiu Feodorov
>      Fix For: JBossAS-3.2.6 Final
>  Attachments: JBossFailOverError.txt
>
>
> See the attachment JBossFailOverError.txt for more details.
> Abstract: I have a 2 node cluster running JbossMQHA. If the Master node is 
> disconnect from the Network, the slave assumes the master role. But when the 
> original Master comes back on-line, it reassumes the Master role, but my 
> subscriber is never notified of the 2nd fail-over and I am unable to publish 
> on the slave for about 5 minutes.

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