NPE trying to add the same drl to a rulebase twice -------------------------------------------------- Key: JBRULES-394 URL: http://jira.jboss.com/jira/browse/JBRULES-394 Project: JBoss Rules Issue Type: Bug Security Level: Public (Everyone can see) Affects Versions: 3.0.3 Reporter: k s Assigned To: Mark Proctor Priority: Minor While doing some experimenting, I generated two almost identical DRLs out of almost identical decision tables. The only difference is in the ruleset/package name The DRLs are provided below. Then I tried to add the two DRLs as packages in the same rulebase. That was not really intentional, but that's another story!. Anyway, the attempt to add the second package resulted in a NPE at point where rule names are checked for equality. After playing around a bit, it seems that the root of the problem is that the rules in the two packages have the same names. ---------------------------------------------------------- Here's the relevant stack trace: ---------------------------------------------------------- java.lang.NullPointerException at org.drools.rule.Rule.equals(Rule.java:435) at org.drools.reteoo.TerminalNode.equals(TerminalNode.java:320) at java.util.ArrayList.indexOf(ArrayList.java:220) at java.util.ArrayList.contains(ArrayList.java:201) at org.drools.reteoo.TupleSource.addTupleSink(TupleSource.java:79) at org.drools.reteoo.TerminalNode.attach(TerminalNode.java:250) at org.drools.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:195) at org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:240) at org.drools.common.AbstractRuleBase.addPackage(AbstractRuleBase.java:255) ---------------------------------------------------------- Here are the first DRL: ---------------------------------------------------------- package Some_business_rules; #generated from Decision Table import org.drools.decisiontable.Cheese; import org.drools.decisiontable.Person; global java.util.List list; #From row number: 17 rule "Cheese fans_17" salience 65519 when Person(age == 42) Cheese(type=="stilton") then list.add("Old man stilton"); end #From row number: 18 rule "Cheese fans_18" salience 65518 when Person(age == 21) Cheese(type=="cheddar") then list.add("Young man cheddar"); end ---------------------------------------------------------- Here are the second DRL: ---------------------------------------------------------- Some_other_business_rules; #generated from Decision Table import org.drools.decisiontable.Cheese; import org.drools.decisiontable.Person; global java.util.List list; #From row number: 17 rule "Cheese fans_17" salience 65519 when Person(age == 42) Cheese(type=="stilton") then list.add("Old man stilton"); end #From row number: 18 rule "Cheese fans_18" salience 65518 when Person(age == 21) Cheese(type=="cheddar") then list.add("Young man cheddar"); end -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira