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https://issues.apache.org/jira/browse/GROOVY-7587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14985171#comment-14985171
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Uwe Schindler commented on GROOVY-7587:
---------------------------------------
Hi,
many thanks. Looks like the ideal workaround to fix this for now.
> Groovy 2.2 and 2.4 all fail to execute almost any script with Java 9 JIGSAW
> preview builds
> ------------------------------------------------------------------------------------------
>
> Key: GROOVY-7587
> URL: https://issues.apache.org/jira/browse/GROOVY-7587
> Project: Groovy
> Issue Type: Bug
> Components: groovy-runtime
> Affects Versions: 2.2.2, 2.4.4
> Environment: java version "1.9.0-ea"
> Java(TM) SE Runtime Environment (build
> 1.9.0-ea-jigsaw-nightly-h3337-20150908-b80)
> Java HotSpot(TM) 64-Bit Server VM (build
> 1.9.0-ea-jigsaw-nightly-h3337-20150908-b80, mixed mode)
> Reporter: Uwe Schindler
> Assignee: Jochen Theodorou
> Priority: Critical
> Labels: Java9
> Fix For: 2.4.6, 2.5.0-beta-1
>
>
> The Lucene project successfully made their code running with the recently
> announced preview builds of Java 9. Unfortunately some parts of Lucene's
> build script and also the build of the Policeman's ForbiddenAPI checker
> (https://github.com/policeman-tools/forbidden-apis/) use groovy to execute
> some stuff that does not work with plain Ant. Similar issues are seen by
> Elasticsearch's scripting support plugin.
> Unfortunately even simple scripts fail quite often. The issue always looks
> like this:
> {code:java}
> def temp = ClassLoader.getSystemClassLoader()
> temp.toString()
> {code}
> {noformat}
> java.lang.reflect.InaccessibleObjectException: Unable to make member of class
> jdk.internal.misc.ClassLoaders$AppClassLoader accessible: module java.base
> does not export jdk.internal.misc to <unnamed module @1a6f5124>
> at
> sun.reflect.Reflection.throwInaccessibleObjectException(java.base@9.0/Reflection.java:462)
> at
> java.lang.reflect.AccessibleObject.checkCanSetAccessible(java.base@9.0/AccessibleObject.java:194)
> at
> java.lang.reflect.AccessibleObject.setAccessible(java.base@9.0/AccessibleObject.java:157)
> at
> org.codehaus.groovy.reflection.CachedConstructor$1.run(CachedConstructor.java:44)
> at java.security.AccessController.doPrivileged(java.base@9.0/Native
> Method)
> at
> org.codehaus.groovy.reflection.CachedConstructor.<init>(CachedConstructor.java:42)
> at
> org.codehaus.groovy.reflection.CachedClass$2.initValue(CachedClass.java:79)
> at
> org.codehaus.groovy.reflection.CachedClass$2.initValue(CachedClass.java:69)
> at
> org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:49)
> at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:36)
> at
> org.codehaus.groovy.reflection.CachedClass.getConstructors(CachedClass.java:268)
> at groovy.lang.MetaClassImpl.<init>(MetaClassImpl.java:218)
> at groovy.lang.MetaClassImpl.<init>(MetaClassImpl.java:228)
> at
> groovy.lang.MetaClassRegistry$MetaClassCreationHandle.createNormalMetaClass(MetaClassRegistry.java:171)
> at
> groovy.lang.MetaClassRegistry$MetaClassCreationHandle.createWithCustomLookup(MetaClassRegistry.java:161)
> at
> groovy.lang.MetaClassRegistry$MetaClassCreationHandle.create(MetaClassRegistry.java:144)
> at
> org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:253)
> at
> org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:285)
> at
> org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:295)
> at
> org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.getMetaClass(MetaClassRegistryImpl.java:261)
> at
> org.codehaus.groovy.runtime.InvokerHelper.getMetaClass(InvokerHelper.java:871)
> at
> org.codehaus.groovy.runtime.callsite.CallSiteArray.createPojoSite(CallSiteArray.java:125)
> at
> org.codehaus.groovy.runtime.callsite.CallSiteArray.createCallSite(CallSiteArray.java:166)
> at
> org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
> at
> org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
> at
> org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)
> at generate-deprecated.run(generate-deprecated.groovy:20)
> at org.codehaus.groovy.ant.Groovy.parseAndRunScript(Groovy.java:501)
> at org.codehaus.groovy.ant.Groovy.execGroovy(Groovy.java:448)
> at org.codehaus.groovy.ant.Groovy.execute(Groovy.java:313)
> {noformat}
> This always happens under the following circumstances. You have a public
> Object accessible from everywhere in the JDK. This object is working like a
> factory and creates an implementation of an abstract class. In the above
> example this is a classloader (abstract class). This returned instance is of
> course some JDK-internal class and the user code is intended to only call the
> visible methods on it.
> Unfortunately groovy tries in the second line to create a metaclass to get
> "full insight" of this internal class. For that it tries to make everything
> accessible. And with Java 9 including JIGSAW this is no longer possible. You
> can use the APIs provided by the internal implementation, but you are not
> allowed to do any non-public stuff. This is disallowed by the Java module
> system and there is no way around (unless you disable the module system
> completely, which will not work in all cases in Java 9 once it is released).
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