[jboss-jira] [JBoss JIRA] (DROOLS-4922) LinkageError: attempted duplicate class definition for materialized Lambda during incremental compilation

LinkageError: attempted duplicate class definition for materialized Lambda during incremental compilation --------------------------------------------------------------------------------------------------------- Key: DROOLS-4922 URL: https://issues.redhat.com/browse/DROOLS-4922 Project: Drools Issue Type: Bug Components: executable model Reporter: Toshiya Kobayashi Assignee: Toshiya Kobayashi Priority: Major In case of incremental compilation, say, a rule is changed: - A lambda consequence (or a lambda predicate) has the same expression - But an "import" statement is added to the rule It will results in {noformat} [ERROR] testIdenticalConsequenceButImportChange[PATTERN_DSL](org.drools.modelcompiler.IncrementalCompilationTest) Time elapsed: 3.135 s <<< ERROR! java.lang.LinkageError: loader org.drools.dynamic.DynamicProjectClassLoader$DefaultInternalTypesClassLoader @2b0dc227 (instance of org.drools.dynamic.DynamicProjectClassLoader$DefaultInternalTypesClassLoader, child of 'app' jdk.internal.loader.ClassLoaders$AppClassLoader) attempted duplicate class definition for org.drools.test.LambdaConsequence6F5B5EC739B778AE0EE14FA22BAFE144. at java.base/java.lang.ClassLoader.defineClass1(Native Method) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1016) at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:877) at org.drools.dynamic.DynamicProjectClassLoader$DefaultInternalTypesClassLoader.defineClass(DynamicProjectClassLoader.java:97) at org.drools.reflective.classloader.ProjectClassLoader.defineType(ProjectClassLoader.java:183) at org.drools.reflective.classloader.ProjectClassLoader.defineClass(ProjectClassLoader.java:195) at org.drools.compiler.kie.builder.impl.KieContainerImpl.reinitModifiedClasses(KieContainerImpl.java:323) at org.drools.compiler.kie.builder.impl.KieContainerImpl.update(KieContainerImpl.java:243) at org.drools.compiler.kie.builder.impl.KieContainerImpl.update(KieContainerImpl.java:236) at org.drools.compiler.kie.builder.impl.KieContainerImpl.updateToVersion(KieContainerImpl.java:194) at org.drools.modelcompiler.IncrementalCompilationTest.testIdenticalConsequenceButImportChange(IncrementalCompilationTest.java:257) ... {noformat}