Error to declare Map/List with generics when having a modify() on RHS --------------------------------------------------------------------- Key: DROOLS-493 URL: https://issues.jboss.org/browse/DROOLS-493 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Environment: * OS: Mac OS X 10.9.2 * Java SE 1.7 * Drools Runtime 6.1.0-Final Reporter: Jinghai Rao Assignee: Mark Proctor For the following rule ----------------------------- package com.sample import java.util.Map; import java.util.HashMap; declare TestFact @propertyReactive data : String end rule "Test Rule" when $fact : TestFact() then Map<String,String> a = new HashMap<String,String>(); modify ($fact) {setData("0")} end ------------------------ We get the following exception: java.lang.RuntimeException: Error while creating KieBase[Message [id=1, level=ERROR, path=rules/Sample.drl, line=11, column=0 text=Unable to resolve type Map<String,String>: Unable to find class 'Map<String,String>']] at org.drools.compiler.kie.builder.impl.KieContainerImpl.getKieBase(KieContainerImpl.java:260) at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:400) at org.drools.compiler.kie.builder.impl.KieContainerImpl.newKieSession(KieContainerImpl.java:375) at com.sample.DroolsTest.main(DroolsTest.java:17) If we remove the generics, or not using modify(), this has no error.