NPE due to activation.getDeclarationValue( declId ) --------------------------------------------------- Key: JBRULES-2621 URL: https://jira.jboss.org/browse/JBRULES-2621 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-api Affects Versions: 5.1.0.FINAL Reporter: Wolfgang Laun Assignee: Mark Proctor Fix For: 5.1.1.FINAL Trying to access the declarations and their values of an activation, as used during ActivationEvent logging: List<String> declIds = ); for( String declId: activation.getDeclarationIDs( ){ Object declVal = activation.getDeclarationValue( declId ); // ... } If, however, a fact is retracted, this code, when executed for an AfterActivationFiredEvent, throws a NPE when declId is a binding for a component of the retracted fact. The optimum solution would be to not get such useless bindings in the List<String> returned by getDeclarationIDs() which is in AgendaItem.java. I have added the if-statement. The following code is untested: public List<String> getDeclarationIDs() { Declaration[] declArray = this.getRule().getDeclarations(); List<String> declarations = new ArrayList<String>(); for( Declaration decl : declArray ) { // return only "sound" declaration IDs if( this.tuple.get( decl ).getObject() != null ){ declarations.add( decl.getIdentifier() ); } } return Collections.unmodifiableList( declarations ); } -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira