[jboss-jira] [Red Hat JIRA] (DROOLS-6016) Drools throws illegal reflective access errors.

Drools throws illegal reflective access errors. ----------------------------------------------- Key: DROOLS-6016 URL: https://issues.redhat.com/browse/DROOLS-6016 Project: Drools Issue Type: Enhancement Reporter: Mirtunjay Singh Assignee: Mario Fusco Priority: Major Drools throws illegal reflective access errors when --illegal-access=deny flag is set. [JEP 396|https://openjdk.java.net/jeps/396] will strongly encapsulate JDK internals by default.  This means that {{--illegal-access-}} parameter will no longer default to {{permit}} in Java 16 or 17.  It will default to {{deny}}. *Error when the illegal-access flag is set as deny.* _java.lang.ExceptionInInitializerError: null_ _at com.thoughtworks.xstream.XStream.setupConverters(XStream.java:989)_ _at com.thoughtworks.xstream.XStream.<init>(XStream.java:592)_ _at com.thoughtworks.xstream.XStream.<init>(XStream.java:514)_ _at com.thoughtworks.xstream.XStream.<init>(XStream.java:483)_ _at com.thoughtworks.xstream.XStream.<init>(XStream.java:429)_ _at com.thoughtworks.xstream.XStream.<init>(XStream.java:396)_ _at org.kie.soup.commons.xstream.XStreamUtils.createTrustingXStream(XStreamUtils.java:119)_ _at org.drools.compiler.kproject.models.KieModuleModelImpl$kModuleMarshaller.<init>(KieModuleModelImpl.java:170)_ _at org.drools.compiler.kproject.models.KieModuleModelImpl$kModuleMarshaller.<init>(KieModuleModelImpl.java:169)_ _at org.drools.compiler.kproject.models.KieModuleModelImpl.<clinit>(KieModuleModelImpl.java:167)_ _at org.drools.compiler.kie.builder.impl.ClasspathKieProject.fetchKModule(ClasspathKieProject.java:180)_ _at org.drools.compiler.kie.builder.impl.ClasspathKieProject.fetchKModule(ClasspathKieProject.java:142)_ _at org.drools.compiler.kie.builder.impl.ClasspathKieProject.discoverKieModules(ClasspathKieProject.java:113)_ _at org.drools.compiler.kie.builder.impl.ClasspathKieProject.init(ClasspathKieProject.java:85)_ _at org.drools.compiler.kie.builder.impl.KieContainerImpl.<init>(KieContainerImpl.java:138)_ _at org.drools.compiler.kie.builder.impl.KieServicesImpl.newKieClasspathContainer(KieServicesImpl.java:135)_ _at org.drools.compiler.kie.builder.impl.KieServicesImpl.getKieClasspathContainer(KieServicesImpl.java:101)_ _at org.drools.compiler.kie.builder.impl.KieServicesImpl.getKieClasspathContainer(KieServicesImpl.java:79)_ _at com.somepackage.SomeClass.someMethod(SomeClass.java:35)_ _Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Comparator java.util.TreeMap.comparator accessible: module java.base does not "opens java.util" to unnamed module @28486680_ _at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:340)_ _at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:280)_ _at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:176)_ _at java.base/java.lang.reflect.Field.setAccessible(Field.java:170)_ _at com.thoughtworks.xstream.core.util.Fields.locate(Fields.java:40)_ _at com.thoughtworks.xstream.converters.collections.TreeMapConverter.<clinit>(TreeMapConverter.java:50)_ _... 24 common frames omitted_   *Warnings when the illegal-access flag is set to debug.* _WARNING: Illegal reflective access by com.thoughtworks.xstream.core.util.Fields (file:/libs/xstream-1.4.10.jar) to field java.util.TreeSet.m_ _at com.thoughtworks.xstream.core.util.Fields.locate(Fields.java:40)_ _at com.thoughtworks.xstream.converters.collections.TreeSetConverter.<clinit>(TreeSetConverter.java:48)_ _at com.thoughtworks.xstream.XStream.setupConverters(XStream.java:990)_ _at com.thoughtworks.xstream.XStream.<init>(XStream.java:592)_ _at com.thoughtworks.xstream.XStream.<init>(XStream.java:514)_ _at com.thoughtworks.xstream.XStream.<init>(XStream.java:483)_ _at com.thoughtworks.xstream.XStream.<init>(XStream.java:429)_ _at com.thoughtworks.xstream.XStream.<init>(XStream.java:396)_ _at org.kie.soup.commons.xstream.XStreamUtils.createTrustingXStream(XStreamUtils.java:119)_ _at org.drools.compiler.kproject.models.KieModuleModelImpl$kModuleMarshaller.<init>(KieModuleModelImpl.java:170)_ _at org.drools.compiler.kproject.models.KieModuleModelImpl$kModuleMarshaller.<init>(KieModuleModelImpl.java:169)_ _at org.drools.compiler.kproject.models.KieModuleModelImpl.<clinit>(KieModuleModelImpl.java:167)_ _at org.drools.compiler.kie.builder.impl.ClasspathKieProject.fetchKModule(ClasspathKieProject.java:180)_ _at org.drools.compiler.kie.builder.impl.ClasspathKieProject.fetchKModule(ClasspathKieProject.java:142)_ _at org.drools.compiler.kie.builder.impl.ClasspathKieProject.discoverKieModules(ClasspathKieProject.java:113)_ _at org.drools.compiler.kie.builder.impl.ClasspathKieProject.init(ClasspathKieProject.java:85)_ _at org.drools.compiler.kie.builder.impl.KieContainerImpl.<init>(KieContainerImpl.java:138)_ _at org.drools.compiler.kie.builder.impl.KieServicesImpl.newKieClasspathContainer(KieServicesImpl.java:135)_ _at org.drools.compiler.kie.builder.impl.KieServicesImpl.getKieClasspathContainer(KieServicesImpl.java:101)_ _at org.drools.compiler.kie.builder.impl.KieServicesImpl.getKieClasspathContainer(KieServicesImpl.java:79)_ _at com.somepackage.SomeClass.someMethod(SomeClass.java:35)_