From the forum: http://community.jboss.org/message/582679

Current development snapshot of JBPM5 spring integration breaks Spring functionality - you can't use beans without class attribute (factory method, abstract beans, etc). Could a commiter apply a simple patch already? It's attached to the issue below since october:

https://issues.jboss.org/browse/JBRULES-2727

With duplicates:

https://issues.jboss.org/browse/JBRULES-2868
https://issues.jboss.org/browse/JBRULES-2689

And it is as simple as reversing equals statement (but needs to be applied in two different places):

Index: src/main/java/org/drools/container/spring/namespace/KnowledgeAgentDefinitionParser.java
===================================================================
— src/main/java/org/drools/container/spring/namespace/KnowledgeAgentDefinitionParser.java (revision )
+++ src/main/java/org/drools/container/spring/namespace/KnowledgeAgentDefinitionParser.java (revision )
@@ -73,7 +73,7 @@
// inject the kagent into any stateless sessions
for ( String beanName : parserContext.getRegistry().getBeanDefinitionNames() ) {
BeanDefinition def = parserContext.getRegistry().getBeanDefinition(beanName);

• if (StatelessKnowledgeSessionBeanFactory.class.getName().equals(def.getBeanClassName())) {
  + if (def.getBeanClassName().equals(StatelessKnowledgeSessionBeanFactory.class.getName())) {
  PropertyValue pvalue = def.getPropertyValues().getPropertyValue( "kbase" );
  RuntimeBeanReference tbf = ( RuntimeBeanReference ) pvalue.getValue();
  if ( kbase.equals( tbf.getBeanName() ) ) {