"InvalidClassException: org.drools.rule.MVELDialectRuntimeData" when a WS tried to retrieve a PKG from BRMS 5 server

Solution Verified - Updated -

Issue

A web service is failing when it tries to retrieve the PKG from BRMS 5 with the following error:

java.io.InvalidClassException: org.drools.rule.MVELDialectRuntimeData; local class incompatible: stream classdesc serialVersionUID = -5592039914251136412, local class serialVersionUID = 5166066541265170937

BRMS 5.3.1 runs on a different server than the web-service is deployed to. Using a KnowledgeAgent to establish connectivity.
The client libraries are 5.3.1 and so is the server. Both client and server uses JDK 1.7. The applyChangeSet is what causes the failure:

kagent.applyChangeSet(ResourceFactory.newUrlResource(guvnorUrl));

Environment

  • Red Hat JBoss Business Rules Management System (BRMS) 5.3.1

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In
Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.