[jboss-user] [JBoss jBPM] - Re: Is it possible to update a process def without versionin

[Manju_Nair]

"tom.baeyens at jboss.com" wrote : you can update process definitions.  (you have to evict the process definitions in hibernate's second level cache, though)
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  | it is not encouraged, just as modifying java byte code in a running program is not encouraged.  you can get into trouble real easy.
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  | same goes for migrating process instances to a newer version.  we plan to provide some support for it in the future, but it is easy to end up trouble.
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  | regards, tom.

could someone please explain this a little more or give me a link to this .
I'm using jbpm 2. is this posibble here ?

Also is there a tutorial for migrating from jbpm 2 to jbpm 3.
I see the archive migration, but what happens to my existing process instances in DB ?

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