[jboss-jira] [JBoss JIRA] Commented: (JBRULES-1982) NullPointerException when executing rule sample

NullPointerException when executing rule sample ----------------------------------------------- Key: JBRULES-1982 URL: https://jira.jboss.org/jira/browse/JBRULES-1982 Project: JBoss Drools Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 5.0.0.M5 Environment: Springsource DM Server v.1.0.1, all jar-s bundled together in single jar file, then converted to bundle using bnd utility Reporter: Hrvoje Habjanic Assignee: Mark Proctor Priority: Minor Hi! I have somewhat non-standard running environment - springsource sever. Because spring requires everything to be provided as bundle, i created drools bundle. I unpacked (extract) all drools jar-s except drools-clips, drools-jsr94 and drools-process-enterprise into single directory, and then created one big jar. Then i converted this jar using bnd utility to bundle. Because springsource uses older antlr, i did copy antlr-runtime-3.1.1 into bundle, to classes inside use this version. In eclipse i created new project, and created helloworld sample. I did manage successfully to execute RuleFlowTest! But, DroolsTest fails with: [2009-02-26 17:18:35.245] server-dm-8 System.err E org.drools.runtime.rule.ConsequenceException: java.lang.NullPointerException [2009-02-26 17:18:35.245] server-dm-8 System.err E at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:23) [2009-02-26 17:18:35.245] server-dm-8 System.err E at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:935) [2009-02-26 17:18:35.245] server-dm-8 System.err E at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:882) [2009-02-26 17:18:35.246] server-dm-8 System.err E at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1072) [2009-02-26 17:18:35.246] server-dm-8 System.err E at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:616) [2009-02-26 17:18:35.246] server-dm-8 System.err E at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:583) [2009-02-26 17:18:35.246] server-dm-8 System.err E at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:151) [2009-02-26 17:18:35.246] server-dm-8 System.err E at com.sample.DroolsTest.main(DroolsTest.java:33) [2009-02-26 17:18:35.246] server-dm-8 System.err E at com.sample.Runner.init(Runner.java:16) [2009-02-26 17:18:35.247] server-dm-8 System.err E at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [2009-02-26 17:18:35.247] server-dm-8 System.err E at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [2009-02-26 17:18:35.247] server-dm-8 System.err E at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [2009-02-26 17:18:35.247] server-dm-8 System.err E at java.lang.reflect.Method.invoke(Method.java:597) [2009-02-26 17:18:35.248] server-dm-8 System.err E at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1414) [2009-02-26 17:18:35.248] server-dm-8 System.err E at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1375) [2009-02-26 17:18:35.248] server-dm-8 System.err E at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1335) [2009-02-26 17:18:35.248] server-dm-8 System.err E at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473) [2009-02-26 17:18:35.248] server-dm-8 System.err E at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409) [2009-02-26 17:18:35.248] server-dm-8 System.err E at java.security.AccessController.doPrivileged(Native Method) [2009-02-26 17:18:35.249] server-dm-8 System.err E at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380) [2009-02-26 17:18:35.249] server-dm-8 System.err E at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264) [2009-02-26 17:18:35.249] server-dm-8 System.err E at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) [2009-02-26 17:18:35.249] server-dm-8 System.err E at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261) [2009-02-26 17:18:35.250] server-dm-8 System.err E at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185) [2009-02-26 17:18:35.250] server-dm-8 System.err E at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164) [2009-02-26 17:18:35.250] server-dm-8 System.err E at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429) [2009-02-26 17:18:35.250] server-dm-8 System.err E at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728) [2009-02-26 17:18:35.251] server-dm-8 System.err E at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.completeRefresh(AbstractDelegatedExecutionApplicationContext.java:288) [2009-02-26 17:18:35.251] server-dm-8 System.err E at org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor$CompleteRefreshTask.run(DependencyWaiterApplicationContextExecutor.java:145) [2009-02-26 17:18:35.252] server-dm-8 System.err E at com.springsource.server.kernel.dm.ContextPropagatingTaskExecutor$2.run(ContextPropagatingTaskExecutor.java:82) [2009-02-26 17:18:35.252] server-dm-8 System.err E at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [2009-02-26 17:18:35.252] server-dm-8 System.err E at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [2009-02-26 17:18:35.253] server-dm-8 System.err E at java.lang.Thread.run(Thread.java:619) [2009-02-26 17:18:35.253] server-dm-8 System.err E Caused by: java.lang.NullPointerException [2009-02-26 17:18:35.254] server-dm-8 System.err E at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:926) [2009-02-26 17:18:35.254] server-dm-8 System.err E ... 31 more Drools file which is executed is: package com.sample import com.sample.DroolsTest.Message; rule "Hello World" when m : Message( status == Message.HELLO, message : message ) then System.out.println( "Ssssss" ); m.setMessage( "Goodbye cruel world" ); m.setStatus( Message.GOODBYE ); update( m ); end rule "GoodBye" when Message( status == Message.GOODBYE, message : message ) then System.out.println( message ); end And DroolsTest java is also unmodified: package com.sample; import org.drools.KnowledgeBase; import org.drools.KnowledgeBaseFactory; import org.drools.builder.KnowledgeBuilder; import org.drools.builder.KnowledgeBuilderError; import org.drools.builder.KnowledgeBuilderErrors; import org.drools.builder.KnowledgeBuilderFactory; import org.drools.builder.ResourceType; import org.drools.io.ResourceFactory; import org.drools.logger.KnowledgeRuntimeLogger; import org.drools.logger.KnowledgeRuntimeLoggerFactory; import org.drools.runtime.StatefulKnowledgeSession; /** * This is a sample class to launch a rule. */ public class DroolsTest { public static final void main(String[] args) { try { // load up the knowledge base KnowledgeBase kbase = readKnowledgeBase(); StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession(); KnowledgeRuntimeLogger logger = KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, "test"); // go ! Message message = new Message(); message.setMessage("Hello World"); message.setStatus(Message.HELLO); ksession.insert(message); ksession.fireAllRules(); logger.close(); } catch (Throwable t) { t.printStackTrace(); } } private static KnowledgeBase readKnowledgeBase() throws Exception { KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add(ResourceFactory.newClassPathResource("Sample.drl"), ResourceType.DRL); KnowledgeBuilderErrors errors = kbuilder.getErrors(); if (errors.size() > 0) { for (KnowledgeBuilderError error: errors) { System.err.println(error); } throw new IllegalArgumentException("Could not parse knowledge."); } KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); return kbase; } public static class Message { public static final int HELLO = 0; public static final int GOODBYE = 1; private String message; private int status; public String getMessage() { return this.message; } public void setMessage(String message) { this.message = message; } public int getStatus() { return this.status; } public void setStatus(int status) { this.status = status; } } } I did try to browse trough source and try to find out what the problem could be, but at no avail.