[jboss-dev-forums] [Design of Messaging on JBoss (Messaging/JBoss)] - Re: Can the transaction manager retry commit or rollback?

[mark.little@jboss.com]

"adrian at jboss.org" wrote : I'm not implementing a TM, I'm implementing an heuristic resource
  | with a local branch log.
  | 
  | JMS is a remote resource.
  | 

OK, with you now.

anonymous wrote : 
  | e.g.
  | If a JBossMessaging server gets enlisted by a transaction manager
  | on a machine that explodes and the log is lost then you need
  | a mechanism to put the messages back in the queue.
  | 
  | The exploded tm is never going to recover. :-)
  | 

I'm sure if you ask an IBM sales-bod they've got a solution for this too ;-) It's just "sometime in 2010"!

anonymous wrote : 
  | There are other reasons why the TM might not complete
  | the transaction (e.g. network outage) and you need to get
  | the messages processed even if it means an heuristic.
  | 
  | Its the same issue as when you need to clear db locks
  | when a server crashes holding the locks and it can't be recovered.

Agreed. Though as ever I'd warn against over-use of heuristics to "solve" the problem. It's often a too-easy cop-out. Not saying it is in this case, but just a general warning.

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