Re: [rules-dev] Exception in runtime

Tom, Looks like a bug and I have an idea why it is happening. Let me do some investigation here and I will get back to you. Meanwhile, feel free to open a ticket to track this or I will do it myself later. Edson 2010/6/22 <Tom.E.Murphy(a)wellsfargo.com&gt; Mauricio – > > Here’s the session set-up and rules code: > > *public* *void* processDataWithRules(BeansLoader loader, Object pf, > GlobalRulesFunctions gf) > > *throws* ARGenTDataInsertionException, ARGenTRunTimeException, Exception > > { > > StatefulKnowledgeSession ksession = *null*; > > *try* > > { > > *if* (kbase.getKnowledgePackages().size() == 0) > > *throw* *new* ARGenTRunTimeException("There are no > knowledge packages (Rules) in the rule base."); > > > > ksession = kbase.newStatefulKnowledgeSession(); > > gf.setRulesSession(ksession); > > ksession.setGlobal("functions", gf); > > > > loader.Load(pf, (StatefulKnowledgeSessionImpl) ksession); // > see below for code of this load operation > > > > *for* (*final* KnowledgePackage kp : kbase > .getKnowledgePackages()) > > *for* (*final* Process p : kp.getProcesses()) > > { > > *final* String id = p.getId(); > > *final* Long lId = *new* Long(id); > > *if* (*this*.topLevelFlowId == 0 || > lId.longValue() == *this*.topLevelFlowId) > > ksession.startProcess(id); > > } > > ksession.fireAllRules(); > > > > } > > *catch* (Throwable t) > > { > > *throw* *new* ARGenTRunTimeException(t); > > } > > *finally* > > { > > gf.setRulesSession(*null*); > > *if* (ksession != *null*) > > ksession.dispose(); > > } > > } > > > > And here’s the object insertion code (BeansLoader). It is a recursive > descent through a hierarchy of XmlBeans objects, inserting the interesting > objects and suppressing others. > > > > *public* *void* Load(Object toLoad, StatefulKnowledgeSessionImpl wm) * > throws* ARGenTDataInsertionException > > { > > *try* > > { > > Class c = toLoad.getClass(); > > *if* (c.isPrimitive() || Suppress(c.getName())) > > *return*; > > wm.insert(toLoad); // insert the object into working memory > > > > Method[] methods = c.getMethods(); > > *for* (Method mIter : methods) > > { > > *if* (mIter.getParameterTypes().length == 0 > > && mIter.getName().startsWith("get") > > && !mIter.getName().startsWith("getIsSet") > > && !mIter.getName().endsWith("Bean")) > > { > > *if* (!mIter.getReturnType().isPrimitive() > > && > !Suppress(mIter.getReturnType().getName())) > > { > > String testName = "getIsSet" + > mIter.getName().substring(3); > > Method mTester = *null*; > > Method m = *null*; > > *try* > > { > > m = *c.getMethod(mIter.getName(),** > null**)*; > > mTester = *c.getMethod(testName, ** > null**)*; > > } > > *catch* (Throwable t) > > { > > // ignore -- testing for null next > > } > > *if* (mTester != *null*) > > { > > Object test = *mTester.invoke(toLoad, > **null**)*; > > Boolean b = *false*; > > *if* (test != *null* && > test.getClass().isInstance(b)) > > { > > b = (Boolean)test; > > *if* (!b) > > *continue*; > > } > > } > > *if* (m != *null*) > > { > > Object o = *mIter.invoke(toLoad, ** > null**)*; > > *if* (o != *null*) > > { > > *Class* co = o.getClass(); > > String className = > co.getCanonicalName(); > > *if* (className.endsWith("[]")) > // an array > > { > > Object [] os = > (Object[])o; > > *for* (Object o1 : os) > > { > > Load(o1,wm); > > } > > } > > *else* *if* (o *instanceof*ArrayList) > > { > > *ArrayList* al = (* > ArrayList*)o; > > *for* (Object o2 : al) > > Load(o2,wm); > > } > > *else* > > { > > Load(o,wm); > > } > > } > > } > > } > > } > > } > > } > > *catch*(Throwable t) > > { > > *throw* *new* ARGenTDataInsertionException(t); > > } > > } > > > > *Tom Murphy* > > Business Process Consultant > Wells Fargo HCFG - CORE Deal Decisioning Platform* > * > 800 S. Jordan Creek Parkway | West Des Moines, IA 50266 > MAC: X2301-01B* > *Office: 515 324 4853 | Mobile: 515 423 4334 > > tom.e.murphy(a)wellsfargo.com > > This transmission may contain information that is confidential and/or > proprietary. If you are not the individual or entity to which it is > addressed, note that any review, disclosure, copying, retransmission, or > other use is strictly prohibited. If you received this transmission in > error, please notify the sender immediately and delete the material from > your system. > > > > *From:* rules-dev-bounces(a)lists.jboss.org [mailto: > rules-dev-bounces(a)lists.jboss.org] *On Behalf Of *Mauricio Salatino > *Sent:* Tuesday, June 22, 2010 9:09 AM > > *To:* Rules Dev List > *Subject:* Re: [rules-dev] Exception in runtime > > > > I'm not aware about Web Logic, but you can review what exactly are you > doing the insertion. Can you share with us where do you have your ksession > (inside a Stateless/Statefull session bean inside weblogic?), how you access > that session to insert facts, etc. > Greetings. > > On Tue, Jun 22, 2010 at 11:03 AM, <Tom.E.Murphy(a)wellsfargo.com&gt; wrote: > > Maurice – > > By design of our runtime components, a single stateful session is owned > and managed by a single thread. Data is only inserted by that one thread > into that session. > > Unless maybe the Web Logic app server is doing something odd under the > covers… > > > > *Tom Murphy* > > Business Process Consultant > Wells Fargo HCFG - CORE Deal Decisioning Platform* > * > 800 S. Jordan Creek Parkway | West Des Moines, IA 50266 > MAC: X2301-01B* > *Office: 515 324 4853 | Mobile: 515 423 4334 > > tom.e.murphy(a)wellsfargo.com > > This transmission may contain information that is confidential and/or > proprietary. If you are not the individual or entity to which it is > addressed, note that any review, disclosure, copying, retransmission, or > other use is strictly prohibited. If you received this transmission in > error, please notify the sender immediately and delete the material from > your system. > > > > *From:* rules-dev-bounces(a)lists.jboss.org [mailto: > rules-dev-bounces(a)lists.jboss.org] *On Behalf Of *Mauricio Salatino > *Sent:* Tuesday, June 22, 2010 8:26 AM > *To:* Rules Dev List > *Subject:* Re: [rules-dev] Exception in runtime > > > > Are you inserting facts from different threads in a statefull session? > > On Tue, Jun 22, 2010 at 10:21 AM, <Tom.E.Murphy(a)wellsfargo.com&gt; wrote: > > Anybody have any ideas on this? > > > > We are seeing ConcurrentModificationException while inserting objects > into working memory. This happens occasionally, either at service start-up, > where the first transaction is being submitted and the rules are loading for > the first time, or sometimes under heavy loads with lots of transactions > being processed by the service: > > Drools 5.0.1-GA > > AS: Web Logic > > JVM: 1.5 > > > > Fragment of stack trace: > > Caused by: java.util.ConcurrentModificationException > > java.util.HashMap$HashIterator.nextEntry(HashMap.java:2117) > > java.util.HashMap$ValueIterator.next(HashMap.java:2147) > > org.drools.reteoo.EntryPointNode.updateSink(EntryPointNode.java:285) > > org.drools.reteoo.ObjectTypeNode.attach(ObjectTypeNode.java:279) > > > org.drools.reteoo.builder.PatternBuilder.attachObjectTypeNode(PatternBuilder.java:234) > > org.drools.reteoo.ClassObjectTypeConf.<init>(ClassObjectTypeConf.java:93) > > > org.drools.common.ObjectTypeConfigurationRegistry.getObjectTypeConf(ObjectTypeConfigurationRegistry.java:58) > > > org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:849) > > > org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:788) > > > org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:216) > > com.wellsfargo.ARGenT.Execution.DefaultLoader.Load(DefaultLoader.java:16) > > > > > > *Tom Murphy > > *Business Process Consultant > Wells Fargo HCFG - CORE Deal Decisioning Platform > > 800 S. Jordan Creek Parkway | West Des Moines, IA 50266 > MAC: X2301-01B > Office: 515 324 4853 | Mobile: 515 423 4334 > > tom.e.murphy(a)wellsfargo.com > > This transmission may contain information that is confidential and/or > proprietary. If you are not the individual or entity to which it is > addressed, note that any review, disclosure, copying, retransmission, or > other use is strictly prohibited. If you received this transmission in > error, please notify the sender immediately and delete the material from > your system. > > > > > > > > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > > > > > -- > - CTO @ http://www.plugtree.com > - MyJourney @ http://salaboy.wordpress.com > - Co-Founder @ http://www.jbug.com.ar > > - Salatino "Salaboy" Mauricio - > > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > > > > > -- > - CTO @ http://www.plugtree.com > - MyJourney @ http://salaboy.wordpress.com > - Co-Founder @ http://www.jbug.com.ar > > - Salatino "Salaboy" Mauricio - > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > > -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com