Hello, I am using jBPM 5.4 with persistence and have long running processes and make make changes to the knowledge base periodically (via drools guvnor 5.5). I use JPAKnowlegeService.loadStatefulKnowledgeSession(...) to retrieve my existing knowledge session. When I make a change to the rule base (via drools 5.5 guvnor) and then try to restart my application (and reload the knowledgesession) I get an exception:
java.lang.RuntimeException: Unable to load session snapshot
Caused by: java.lang.NullPointerException
I am NOT currently using a KnowledgeAgent and it seems like it should be able to help. I have read over the drools forum and this one and see a few discussions on the topic (Re: persisted stateful sessions and knowledge base changes) but nothing concrete to put me on the right path.
The examples with knowledgeagent I have found assume that I am calling: StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
Can someone please show/explain how I can reload an existing persisted knowledgesession given changes in my knowledge base? (for example, can the knowledgeagent and JPAKnowlegeService.loadStatefulKnowledgeSession be used together? If not, do I load the existing statefulknowledgesession by some other means?)
I am using Spring-based configuration, but any insight would be GREATLY appreciated.