I don't think you will have any luck with your Jira issue. Let me explain a 
little more (this can be read in other articles as well, even the jBPM docs I 
think)

Normally the client only has 'control' for a very small amount of time. A 
second is a lot already. Timers that need to go off within a second are mostly 
useless. Remember, this is mainly workflow!!! so clashes occur rarely

If a transition is taken and after that something goes wrong, the best thing to 
do is to go back to the last wait-state. That is the situation where external 
action was needed. That external action can be repeated (e.g. task not ended, 
user has to do it again) This is easiest done with a transaction roll-back in 
the database. Committing on each node boundary or even within nodes (creation 
of timers) would make this impossible to do and result in a lot more 
complicated system.

If you want to have a STP system with (probably) persistency on nodes etc... 
you can have a look at the PVM and simply develop your own language and 
behaviour on top of that. Might also be that an 'stp' language is developed, 
though I'm not sure.

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