[infinispan-dev] Can we replace Hypersonic with...

[Manik Surtani]

On 16 Dec 2010, at 14:19, Mark Little wrote:

> 
> On 16 Dec 2010, at 10:51, Manik Surtani wrote:
> 
>> Ah right, I get your point.  So there are 2 cases:
>> 
>> 1) When the failing resource manager is *not* an Infinispan node: returning a list of prepared or heuristically committed Xids is trivial for Infinispan since (a) we maintain an internal list of prepared txs, and (b) we don't heuristically commit. (Mircea can confirm this)
>> 
>> 2) When the failing resource manager is an Infinispan node (failed and restarted, for example), and the TM calls recover on this node.  In this case, recover will return a null, which, correctly, will lead the TM to believe that there are no prepared or heuristically committed txs on this node - which is correct, since the node would have been reset to the last-known stable state prior to the failure.
> 
> Does recover return a list of Xids for active (inflight) resources? Since recover can be called at any time, it's possible that the Xids may/can point to resources that have not failed.
> 
> The thing to remember is that the transaction manager may fail independently of the resource manager. Do you think that the implementation you've got at the moment will be fine in that circumstance?

Yes, this is case (1), as I had outlined earlier.  We don't deal with this at the moment and you're right that we should.  There is an open JIRA for this.

Cheers
Manik
--
Manik Surtani
manik at jboss.org
twitter.com/maniksurtani

Lead, Infinispan
http://www.infinispan.org