I did some more testing with different mockup processes and I found a bug in how tokens
are signalled, cancelled, and moved by the ProcessInstanceBean. Basically the action
class holds a reference to the old instance of the managed bean that it uses for certain
things, causing the part of the transaction to possibly be executed on an old jbpmContext,
which would then fail.
I have reorganized some of that code to handle JbpmContexts more correctly, and I ported
the token signalling to use this structure and the problem is now fixed. Tomorrow I will
go through and update the remainder of the actions similarly, and go through another round
of testing.
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