[jboss-jira] [JBoss JIRA] Closed: (JBRULES-2887) AccumulateNode runs into NPE

AccumulateNode runs into NPE ---------------------------- Key: JBRULES-2887 URL: https://issues.jboss.org/browse/JBRULES-2887 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Components: drools-core Affects Versions: 5.1.1.FINAL Reporter: Wolfgang Laun Assignee: Edson Tirelli Priority: Critical Fix For: 5.2.0.M1 Attachments: DroolsTest.java, JB2887.zip, SampleAlarmRules.drl A rule such as rule "average" when B( id < 10 ) $list: List() from collect ( A() over window:time(10s) ) Number( $avg: doubleValue ) from accumulate( A( $id : id ) from $list, average( $id ) ) then System.out.println( "average = " + $avg ); end runs into a NPE Caused by: java.lang.NullPointerException at org.drools.reteoo.AccumulateNode.getFirstMatch(AccumulateNode.java:967) at org.drools.reteoo.AccumulateNode.splitList(AccumulateNode.java:920) at org.drools.reteoo.AccumulateNode.removePreviousMatchesForLeftTuple(AccumulateNode.java:874) at org.drools.reteoo.AccumulateNode.retractLeftTuple(AccumulateNode.java:205) at org.drools.reteoo.CompositeLeftTupleSinkAdapter.doPropagateRetractLeftTuple(CompositeLeftTupleSinkAdapter.java:238) at org.drools.reteoo.CompositeLeftTupleSinkAdapter.propagateRetractLeftTupleDestroyRightTuple(CompositeLeftTupleSinkAdapter.java:138) at org.drools.reteoo.AccumulateNode.retractLeftTuple(AccumulateNode.java:212) at org.drools.reteoo.ModifyPreviousTuples.retractTuples(ModifyPreviousTuples.java:111) at org.drools.reteoo.EntryPointNode.modifyObject(EntryPointNode.java:176) at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:450) at org.drools.common.NamedEntryPoint.update(NamedEntryPoint.java:361) at org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:183) at org.drools.base.DefaultKnowledgeHelper.update(DefaultKnowledgeHelper.java:196) at event.Rule_launch_0.defaultConsequence(Rule_launch_0.java:7) at event.Rule_launch_0DefaultConsequenceInvoker.evaluate(Rule_launch_0DefaultConsequenceInvoker.java:33) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:913) A null Parameter accctx is passed down from retractLeftTuple.