Re: [rules-users] java.lang.ClassCastException: org.drools.reteoo.BetaMemory cannot be cast to org.drools.reteoo.AlphaNode$AlphaMemory

Yes, I am getting this exception (sadly, not something that I am just worried about). I am checking for rule complication errors before running the rules, and no errors are being given. I am not dynamically adding or removing rules once I have my knowledge base setup, it does not change though the duration of the run. I am using a StatefulKnowledgeSession, and I make sure that after each run that I am calling dispose in a finally block. So shouldn't be any strange memory issues. To add to the original description, I am getting these exceptions in my unit tests. There is one unit test suite that when disabled the exception goes away, but when enabled the exceptions happen in other suites. Which of course is odd and led me to believe that there is a problem with the unit tests (which is still not ruled out). But the suites are using different sessions, same rules, but totally different instances of everything. The only thing I am doing that may be a little funny is consolidating a collection of objects into one then retracting the collection, but when I comment out this rule I still am getting this exception. Aside from this one case, I am not doing anything crazy. [code] //ArrayList provided by drools seems to dynamically adjust with the retractions, this safeguards us against that. ArrayList safetyArr = new ArrayList($attrs); ArrayList values = new ArrayList(); for (int i=0; i < safetyArr.size(); i++){ Attribute attr = ((Attribute) safetyArr.get(i)); values.add(attr.getValue()); retract(attr); } insert(newAttribute($redHatName, StringUtils.join(values, ","))); [/code] Any other thoughts you may have would be appreciated. Thanks! Davide Sottara wrote -- View this message in context: http://drools.46999.n3.nabble.com/java-lang-ClassCastException-org-drools... Sent from the Drools: User forum mailing list archive at Nabble.com.