Huisheng Xu "The easiest way to solve this problem is restart you server, then the process engine will re-initalize database."
With the term "server" what do you mean in jbpm terms ? what is the method object to call getting the shutdown ?
I'm using ProcessEngine instance do you mean this object ? I need to call ProcessEngine.close() and after ProcessEngine.buildProcessEngine() to restart "the server" ?
I'll try....