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

[Toshiya Kobayashi (Jira)]

Toshiya Kobayashi created DROOLS-4922:
-----------------------------------------

             Summary: 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: Luca Molteni


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}



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