[jboss-jira] [JBoss JIRA] Issue Comment Edited: (JBRULES-2734) NPE loading changeset

[ https://issues.jboss.org/browse/JBRULES-2734?page=com.atlassian.jira.plug... ] Anton Litvinenko edited comment on JBRULES-2734 at 5/17/11 2:11 PM: -------------------------------------------------------------------- @Esteban, for me it is failing when a rule is present in the package (compiled and distributed by Guvnor). The change set pointed to that package and ruleflow is not even using it. I change the ruleflow (not even touching the rule), commit it to Guvnor, re-build the package and see change-set update crash in the log. change-set: {code:xml} <change-set xmlns='http://drools.org/drools-5.0/change-set' xmlns:xs='http://www.w3.org/2001/XMLSchema-instance' xs:schemaLocation='http://drools.org/drools-5.0/change-set drools-change-set-5.0.xsd'> <add> <resource source='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST' type='PKG' basicAuthentication='enabled' username='' password=''/> </add> </change-set> {code} Rule: {code:xml} #created on: Apr 7, 2011 package my.package; import java.util.Map; rule "HelloWorldRule" when params : Map() eval( params.get("Greeting") == null ) then params.put("Greeting", "Hello World!" ); update( params ); end {code} And the stack trace: {code} [2011:05:137 14:05:167:debug] ResourceChangeScanner thread is waiting for 30 seconds. [2011:05:137 14:05:166:debug] ResourceChangeScanner attempt to scan 1 resources [2011:05:137 14:05:173:debug] ResourceChangeScanner modified resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] : 1305640544000 : 1305640889000 [2011:05:137 14:05:173:debug] ResourceChangeNotification received ChangeSet notification [2011:05:137 14:05:173:debug] ResourceChangeScanner thread is waiting for 30 seconds. [2011:05:137 14:05:173:debug] ResourceChangeNotification processing ChangeSet [2011:05:137 14:05:174:debug] ResourceChangeNotification ChangeSet modified resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] for listener=org.drools.agent.impl.KnowledgeAgentImpl@602fe64a [2011:05:137 14:05:174:debug] KnowledgeAgent received ChangeSet changed notification [2011:05:137 14:05:175:debug] ResourceChangeNotification thread is waiting for queue update [2011:05:137 14:05:175:info] KnowledgeAgent applying ChangeSet [2011:05:137 14:05:175:debug] KnowledgeAgent removing mappings for resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] with unsubscribe=true [2011:05:137 14:05:176:debug] KnowledgeAgent notifier unsubscribing to resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] [2011:05:137 14:05:176:debug] ResourceChangeNotification unsubscribing listener=org.drools.agent.impl.KnowledgeAgentImpl@602fe64a to resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] [2011:05:137 14:05:176:debug] ResourceChangeScanner unsubcribing notifier=org.drools.io.impl.ResourceChangeNotifierImpl@68b8359b to resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] [2011:05:137 14:05:176:debug] ResourceChangeScanner resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] now has no subscribers [2011:05:137 14:05:176:debug] KnowledgeAgent rebuilding KnowledgeBase using ChangeSet [2011:05:137 14:05:176:info] KnowledgeAgent performing an incremental build of the ChangeSet [2011:05:137 14:05:229:debug] KnowledgeAgent: Diffing: [UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] no visitor implementation for : class org.drools.ruleflow.core.RuleFlowProcess : org.drools.ruleflow.core.RuleFlowProcess@30138b [2011:05:137 14:05:234:debug] BinaryResourceDiffProducerImpl: Comparing [Rule name=HelloWorldRule, agendaGroup=MAIN, salience=0, no-loop=false] against [Rule name=HelloWorldRule, agendaGroup=MAIN, salience=0, no-loop=false] Exception in thread "Thread-17" org.drools.RuntimeDroolsException: java.lang.reflect.InvocationTargetException : [Rule name=HelloWorldRule, agendaGroup=MAIN, salience=0, no-loop=false] at org.drools.core.util.ReflectiveVisitor.visit(ReflectiveVisitor.java:56) at org.drools.agent.impl.BinaryResourceDiffProducerImpl.diff(BinaryResourceDiffProducerImpl.java:63) at org.drools.agent.impl.KnowledgeAgentImpl.incrementalBuildResources(KnowledgeAgentImpl.java:785) at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:586) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:185) at org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.run(KnowledgeAgentImpl.java:1106) at java.lang.Thread.run(Thread.java:680) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.drools.core.util.ReflectiveVisitor.visit(ReflectiveVisitor.java:47) ... 6 more Caused by: java.lang.NullPointerException at org.drools.rule.EvalCondition.equals(EvalCondition.java:169) at org.drools.rule.GroupElement.equals(GroupElement.java:273) at org.drools.agent.impl.BinaryResourceDiffProducerImpl.compareRules(BinaryResourceDiffProducerImpl.java:258) at org.drools.agent.impl.BinaryResourceDiffProducerImpl.visitRule(BinaryResourceDiffProducerImpl.java:117) ... 11 more [2011:05:137 14:05:172:debug] ResourceChangeScanner attempt to scan 0 resources [2011:05:137 14:05:172:debug] ResourceChangeScanner thread is waiting for 30 seconds. {code} Whenever I delete rule from package -> I dont see this error anymore was (Author: anton.litvinenko): @Esteban, for me it is failing when a rule is present in the package (compiled and distributed by Guvnor). The change set pointed to that package and ruleflow is not even using it. change-set: {code:xml} <change-set xmlns='http://drools.org/drools-5.0/change-set' xmlns:xs='http://www.w3.org/2001/XMLSchema-instance' xs:schemaLocation='http://drools.org/drools-5.0/change-set drools-change-set-5.0.xsd'> <add> <resource source='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST' type='PKG' basicAuthentication='enabled' username='' password=''/> </add> </change-set> {code} Rule: {code:xml} #created on: Apr 7, 2011 package my.package; import java.util.Map; rule "HelloWorldRule" when params : Map() eval( params.get("Greeting") == null ) then params.put("Greeting", "Hello World!" ); update( params ); end {code} And the stack trace: {code} [2011:05:137 14:05:167:debug] ResourceChangeScanner thread is waiting for 30 seconds. [2011:05:137 14:05:166:debug] ResourceChangeScanner attempt to scan 1 resources [2011:05:137 14:05:173:debug] ResourceChangeScanner modified resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] : 1305640544000 : 1305640889000 [2011:05:137 14:05:173:debug] ResourceChangeNotification received ChangeSet notification [2011:05:137 14:05:173:debug] ResourceChangeScanner thread is waiting for 30 seconds. [2011:05:137 14:05:173:debug] ResourceChangeNotification processing ChangeSet [2011:05:137 14:05:174:debug] ResourceChangeNotification ChangeSet modified resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] for listener=org.drools.agent.impl.KnowledgeAgentImpl@602fe64a [2011:05:137 14:05:174:debug] KnowledgeAgent received ChangeSet changed notification [2011:05:137 14:05:175:debug] ResourceChangeNotification thread is waiting for queue update [2011:05:137 14:05:175:info] KnowledgeAgent applying ChangeSet [2011:05:137 14:05:175:debug] KnowledgeAgent removing mappings for resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] with unsubscribe=true [2011:05:137 14:05:176:debug] KnowledgeAgent notifier unsubscribing to resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] [2011:05:137 14:05:176:debug] ResourceChangeNotification unsubscribing listener=org.drools.agent.impl.KnowledgeAgentImpl@602fe64a to resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] [2011:05:137 14:05:176:debug] ResourceChangeScanner unsubcribing notifier=org.drools.io.impl.ResourceChangeNotifierImpl@68b8359b to resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] [2011:05:137 14:05:176:debug] ResourceChangeScanner resource=[UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] now has no subscribers [2011:05:137 14:05:176:debug] KnowledgeAgent rebuilding KnowledgeBase using ChangeSet [2011:05:137 14:05:176:info] KnowledgeAgent performing an incremental build of the ChangeSet [2011:05:137 14:05:229:debug] KnowledgeAgent: Diffing: [UrlResource path='http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/my.package/LATEST'] no visitor implementation for : class org.drools.ruleflow.core.RuleFlowProcess : org.drools.ruleflow.core.RuleFlowProcess@30138b [2011:05:137 14:05:234:debug] BinaryResourceDiffProducerImpl: Comparing [Rule name=HelloWorldRule, agendaGroup=MAIN, salience=0, no-loop=false] against [Rule name=HelloWorldRule, agendaGroup=MAIN, salience=0, no-loop=false] Exception in thread "Thread-17" org.drools.RuntimeDroolsException: java.lang.reflect.InvocationTargetException : [Rule name=HelloWorldRule, agendaGroup=MAIN, salience=0, no-loop=false] at org.drools.core.util.ReflectiveVisitor.visit(ReflectiveVisitor.java:56) at org.drools.agent.impl.BinaryResourceDiffProducerImpl.diff(BinaryResourceDiffProducerImpl.java:63) at org.drools.agent.impl.KnowledgeAgentImpl.incrementalBuildResources(KnowledgeAgentImpl.java:785) at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:586) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:185) at org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.run(KnowledgeAgentImpl.java:1106) at java.lang.Thread.run(Thread.java:680) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.drools.core.util.ReflectiveVisitor.visit(ReflectiveVisitor.java:47) ... 6 more Caused by: java.lang.NullPointerException at org.drools.rule.EvalCondition.equals(EvalCondition.java:169) at org.drools.rule.GroupElement.equals(GroupElement.java:273) at org.drools.agent.impl.BinaryResourceDiffProducerImpl.compareRules(BinaryResourceDiffProducerImpl.java:258) at org.drools.agent.impl.BinaryResourceDiffProducerImpl.visitRule(BinaryResourceDiffProducerImpl.java:117) ... 11 more [2011:05:137 14:05:172:debug] ResourceChangeScanner attempt to scan 0 resources [2011:05:137 14:05:172:debug] ResourceChangeScanner thread is waiting for 30 seconds. {code} Whenever I delete rule from package -> I dont see this error anymore -- This message is automatically generated by JIRA. 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