Re: [rules-users] Unexpected java.lang.NullPointerException at org.drools.core.util.RightTupleIndexHashTable.removeAdd(RightTupleIndexHashTable.java:353)

Tuesday, 23 October 2012

This may or may not be relevant (especially as this was working with
5.3.0) but a look at the RHS shows that the changes to a Subscenario
fact are done by setting two fields (step, sub_run) followed by a call
to update(act), which isn't wrong by itself. There is, however, an
insert of a new fact between the two changes. Making the rules engine
reconsider facts in WM while a fact is not in sync with the engine's
view must be considered an anti-pattern - it's dangerous.

-W

On 23/10/2012, Mark Proctor <mproctor(a)codehaus.org&gt; wrote:
...
 You were not subscribed to the mailing list at the time, so this post
did
 not
 make it through to the main list. If you could make a self contained unit
 test, we'll fix it asap. Follow details here:

http://docs.jboss.org/drools/release/5.4.0.Final/droolsjbpm-introduction-...

 Take a look at MiscTest in drools-compiler to get an idea of how to write
 tests.

 Mark

 ru wrote
> Dear drools-users and team!
>
> My working for years code cease to work after switching from Drools
> 5.3.0Final to 5.4.0Final.
>
> Here is a rule of interest:
> ..........................................................................
> rule "Subscenario-Start"
> 	dialect "java"
> 	when
> act: Subscenario( status == "START", $super_run: super_run, $run: run )
> 	then
> Scenario scenario = (Scenario) DroolsTab.mapInstance( act.sub_scenario );
> scenario.run = new Integer ( runcount.intValue() + 1 );
> scenario.super_run = $super_run;
> scenario.caller = $run;
> scenario.status = "START";
> if ( traceLevel.intValue() > 0 )
>   System.out.println( "STARTING SUB-SCENARIO "+scenario.title+"
> "+scenario.run );
> Map acm = contexToMap( act.context );
> Map scm = contexToMap( scenario.context );
> Map rmp = replace( act.ctxmap, acm );
> scenario.ctxmap = replace( scm, rmp );
> System.out.println( "1" );
> if ( act.repeat != null )
> {
>   if ( act.step == null )
>     act.step = new Integer( 0 );
>   repeatStep( act, scenario.ctxmap, act.step.intValue() );
> }
> System.out.println( "2" );
> insert( scenario );
> System.out.println( "3 "+act.wait_subscenario );
> if ( act.wait_subscenario != null && act.wait_subscenario.booleanValue()
> )
>   act.status = "REPEAT";
> else
>   act.status = "DONE";
> System.out.println( "4 "+act.status );
> act.sub_run = scenario.run;
> update( act );
> System.out.println( "5" );
> DroolsTab.getWorkingMemory().setGlobal( "runcount", scenario.run );
> System.out.println( "6" );
> end
> ..........................................................................
>
> Here is a trace (Please note: The first time it worked, and the second
> gave an error):
>
> ..........................................................................
> ru@ru-desktop ~ $ DroolsTabScene-5.2/run_protege.sh
> WARNING: missing bundle: protege_text -- BundleHelper.
> <init>
> ()
> Loaded 5000 instances: Scenario_ProjectKB_Class20011
> OpenMap(tm) Version 5.0
>   Copyright (C) BBNT Solutions LLC.  All rights reserved.
>   See http://openmap.bbn.com/ for details.
>
> OpenMapTab scenario = ru.oogis.dro.DroolsTab evaluateScript "Run
> Scenario"
> Load time for file:/home/ru/DroolsTabScene-5.2/projects/Sea.pprj = 2 sec
> (project) + 1 sec (ui)
> DroTimer clock: ru.oogis.util.DroClock < second: 0 >
> Run scenario: ru.oogis.dro.DroolsTab evaluateScript "Run Scenario"
> FIRE: Start Scenario Command
> FIRE: Scenario Null
> STARTING SCENARIO s1.Collision 1
> FIRE: Scenario Start
> start TASK s1.Watch 1
> FIRE: Task Start s1.Watch
> start ACTION s1.Ports on Map 1
> start ACTION s1.Wait Collision 1
> FIRE: Interim Action Done s1.Ports on Map
> start ACTION s1.Start Cruise from Primorsk 1
> STARTING SUB-SCENARIO c1.Cruise from Primorsk 2
> 1
> 2
> 3 false
> 4 DONE
> 5
> 6
> FIRE: Interim Action Done s1.Start Cruise from Primorsk
> start ACTION s1.Cruise Shift 1
> FIRE: Scenario Start
> start TASK c1.Cruise from Primorsk 2
> FIRE: Task Start c1.Cruise from Primorsk
> start ACTION c1.Launch at Primorsk 2
> FIRE: Interim Action Done c1.Launch at Primorsk
> start ACTION c1.Mooring 2
> FIRE: Retract Done Activity c1.Launch at Primorsk
> FIRE: Retract Done Activity s1.Start Cruise from Primorsk
> FIRE: Retract Done Activity s1.Ports on Map
> FIRE: Interim Action Done c1.Mooring
> start ACTION Cargo Loading Message 2
> FIRE: Interim Action Done Cargo Loading Message
> start ACTION c1.Cargo Loading 2 2
> FIRE: Retract Done Activity Cargo Loading Message
> FIRE: Retract Done Activity c1.Mooring
> FIRE: Interim Action Done s1.Cruise Shift
> start ACTION s1.Second Cruise 1
> STARTING SUB-SCENARIO c1.Cruise to Primorsk 3
> 1
> 2
> 3 true
> 4 REPEAT
> Exception in thread "AWT-EventQueue-0" Exception executing consequence
> for
> rule "Subscenario-Start" in ActionExecutor:
> java.lang.NullPointerException
> 	at
>
org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
> 	at
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1283)
> 	at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:1209)
> 	at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1442)
> 	at
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:710)
> 	at
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)
> 	at
>
org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:230)
> 	at org.drools.runtime.rule.StatefulRuleSession$fireAllRules.call(Unknown
> Source)
> 	at DroTimer.repeat(Script1.groovy:25)
> 	at ru.igis.omtab.RuNA.repeatSecondActions(RuNA.java:177)
> 	at ru.igis.omtab.Clock.manageClock(Clock.java:82)
> 	at ru.igis.omtab.Clock.actionPerformed(Clock.java:59)
> 	at javax.swing.Timer.fireActionPerformed(Timer.java:313)
> 	at javax.swing.Timer$DoPostEvent.run(Timer.java:244)
> 	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)
> 	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:647)
> 	at java.awt.EventQueue.access$000(EventQueue.java:96)
> 	at java.awt.EventQueue$1.run(EventQueue.java:608)
> 	at java.awt.EventQueue$1.run(EventQueue.java:606)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at
>
java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:105)
> 	at java.awt.EventQueue.dispatchEvent(EventQueue.java:617)
> 	at
> java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
> 	at
> java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
> 	at
> java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
> 	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
> 	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
> 	at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)
> Caused by: java.lang.NullPointerException
> 	at
>
org.drools.core.util.RightTupleIndexHashTable.removeAdd(RightTupleIndexHashTable.java:353)
> 	at org.drools.reteoo.JoinNode.modifyRightTuple(JoinNode.java:212)
> 	at org.drools.reteoo.BetaNode.modifyObject(BetaNode.java:531)
> 	at org.drools.reteoo.JoinNode.modifyObject(JoinNode.java:446)
> 	at
>
org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateModifyObject(CompositeObjectSinkAdapter.java:507)
> 	at
>
org.drools.reteoo.CompositeObjectSinkAdapter.propagateModifyObject(CompositeObjectSinkAdapter.java:432)
> 	at org.drools.reteoo.AlphaNode.modifyObject(AlphaNode.java:157)
> 	at
>
org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateModifyObject(CompositeObjectSinkAdapter.java:507)
> 	at
>
org.drools.reteoo.CompositeObjectSinkAdapter.propagateModifyObject(CompositeObjectSinkAdapter.java:421)
> 	at
> org.drools.reteoo.ObjectTypeNode.modifyObject(ObjectTypeNode.java:314)
> 	at
> org.drools.reteoo.EntryPointNode.modifyObject(EntryPointNode.java:265)
> 	at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:470)
> 	at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:370)
> 	at
> org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:317)
> 	at
> org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:312)
> 	at
>
ActionExecutor.Rule_Subscenario_Start_a83c5a15cccb436f8a66818ffd048e7c.defaultConsequence(Rule_Subscenario_Start_a83c5a15cccb436f8a66818ffd048e7c.java:34)
> 	at
>
ActionExecutor.Rule_Subscenario_Start_a83c5a15cccb436f8a66818ffd048e7cDefaultConsequenceInvokerGenerated.evaluate(Unknown
> Source)
> 	at
>
ActionExecutor.Rule_Subscenario_Start_a83c5a15cccb436f8a66818ffd048e7cDefaultConsequenceInvoker.evaluate(Unknown
> Source)
> 	at
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1273)
> 	... 26 more
> ..........................................................................
>
> Any help would be greatly appreciated.
> Sincerely,
>    Ru

 --
 View this message in context:

http://drools.46999.n3.nabble.com/Unexpected-java-lang-NullPointerExcepti...
 Sent from the Drools: User forum mailing list archive at Nabble.com.
 _______________________________________________
 rules-users mailing list
 rules-users(a)lists.jboss.org
 https://lists.jboss.org/mailman/listinfo/rules-users

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

Re: [rules-users] Unexpected java.lang.NullPointerException at org.drools.core.util.RightTupleIndexHashTable.removeAdd(RightTupleIndexHashTable.java:353)