[jbosscache-dev] JBoss Cache weakness handling heuristic transaction outcomes - [Fwd: [Fwd: New case comment notification. Case Number 00017677]]

[Manik Surtani]

Sure.  I suspect they would already deal with this in such a manner  
anyway, given that this is how Hibernate deals with STATUS_UNKNOWN.


On 22 Aug 2007, at 11:33, Jonathan Halliday wrote:

>
> The client app will actually get a heuristic exception in response  
> to its commit call and should do cleanup in the exception handler.  
> However, that's not always going to be user code, it may be e.g.  
> the app server's EJB container in the case of CMT. Hence if you go  
> down this route, which I agree is probably the best approach, other  
> parts of the app server may need to be aware of the issues.
>
> Jonathan.
>
> Manik Surtani wrote:
>> +1.  So the controlling app - which would typically be a  
>> participant in the tx anyway - would react to a STATUS_UNKNOWN by  
>> clearing the cache of the nodes involved.  The cache itself just  
>> treats STATUS_UNKNOWN as a rollback.
>> On 21 Aug 2007, at 19:01, Jason T. Greene wrote:
>>> Manik Surtani wrote:
>>>> Ok, I just spoke to Steve @ Hibernate on how Hibernate deals  
>>>> with this situation.  From an IM conversation:
>>>> "that is deemed a failed transaction
>>>> anything other than committed"
>>>> So Hibernate rolls back STATUS_UNKNOWN as well.  I think this is  
>>>> therefore a safe default.
>>>> Is there a good reason to try and purge the nodes in such a  
>>>> case?  Or just stick with the default above?
>>>
>>> I think this makes more sense for the cache controlling  
>>> application to be responsible for removing data. If you look at  
>>> the hibernate case it does stuff outside the realm of the tx  
>>> boundary anyway (putForExternalRead). So even if we did auto  
>>> purge, it's not guaranteed that we are purging the correct data.
>>>
>>> -- 
>>> Jason T. Greene
>>> Lead, POJO Cache
>>> JBoss, a division of Red Hat
>> -- 
>> Manik Surtani
>> Lead, JBoss Cache
>> JBoss, a division of Red Hat
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>
>
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--
Manik Surtani

Lead, JBoss Cache
JBoss, a division of Red Hat