[jboss-dev-forums] [JBoss Transactions Development] - Re: Remote Txn Inflow: Synchronizations

[Jonathan Halliday]

Jonathan Halliday [http://community.jboss.org/people/jhalliday] created the discussion

"Re: Remote Txn Inflow: Synchronizations"

To view the discussion, visit: http://community.jboss.org/message/629518#629518

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> when we start recovery processing on the crashed-and-restored node, whatever mechanism we use to reconstitute the XAResource(s) could also be used to restore the Synchronizations. 

Won't work I'm afraid. The XAResources are disposed of at the end of commit processing. afterCompletions run after that, hence the name. So, no XAResource to hook in to at recovery time. Given that the remote comms protocol is one way, you need a top down discovery mechanism to identify orphaned afterCompletions in a still running subordinate during recovery of a previously crashed parent, or some timeout like mechanism in the child. It's basically a simpler analog of the problem that XAResource.recover is designed to solve for resources.
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