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From "Lin Sun (JIRA)" <>
Subject [jira] Commented: (GERONIMO-4461) Improve exception during transaction manager one phase commit
Date Fri, 12 Dec 2008 18:55:44 GMT


Lin Sun commented on GERONIMO-4461:

Hi David, thanks for your comments!

Regarding calling forget, I found the following in the OTS v1.4 spec (under 2.8.5)

This forget operation is performed only if the resource raised a heuristic outcome exception

to rollback, commit, commit_one_phase, or prepare. Once the coordinator has 
determined that the heuristic situation has been addressed, it should issue forget on 
the resource. The resource can forget all knowledge of the transaction. 

What is not clear to me is what can TM do to address the heuristic situation, other than throw
the exception out to the originator and set the transaction status?

Regarding XAException.XA_HEURCOM, it means "The transaction branch has been heuristically
committed. ", per JTA spec.   I think XAException.XA_HEURMIX means committed some and rolled
back some.

Regarding test cases, I have some test cases that would arise these XAExceptions during commit/rollback
at the XAResource impl.   

> Improve exception during transaction manager one phase commit
> -------------------------------------------------------------
>                 Key: GERONIMO-4461
>                 URL:
>             Project: Geronimo
>          Issue Type: Improvement
>      Security Level: public(Regular issues) 
>          Components: transaction manager
>    Affects Versions: 2.2
>            Reporter: Lin Sun
>            Assignee: Lin Sun
>             Fix For: 2.2
> Currently,  during transaction manager one phase commit, if there is XAException arise
from XAResource.commit, the code just throws RollbackException.
> We should provide a more detailed Exceptions, that is:
> 1. If the XAException is XAException.XA_HEURRB, we throw HeuristicRollbackException,
and call XAResource to forget
> 2. If the XAException is XAException.XA_HEURMIX, we throw HeuristicMixedException, and
call XAResource to forget
> 3. If the XAException is XAException.XA_HEURCOM, we don't need to inform the transaction
originator, but we want to call XAResource to forget.
> 4. Other XAException, throw RollbackException, same as the current code.
> Thoughts?
> Lin

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