[GROOVY-8160] Exception when evaluating two Groovy scripts containing an enum in parallel

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.10
• Fix Version/s: 2.4.11
• Environment: openjdk version "1.8.0_111"; OpenJDK Runtime Environment (build 1.8.0_111-8u111-b14-2~bpo8+1-b14); OpenJDK 64-Bit Server VM (build 25.111-b14, mixed mode)
• Assignee: Paul King
• Reporter: Michael Walser
• Created: 22/Apr/17 00:59
• Updated: 20/Jun/17 01:49
• Resolved: 26/Apr/17 16:01

Description

It appears like a concurrent invocation of GroovyShell.evaluate results in a exception if the evaluated script contains an enum.

The following code reproduces this issue:

import groovy.lang.GroovyShell;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;


public class MyReproducer {
    public static void main(String [] args) throws InterruptedException {

        // Uncomment this and the problem will go away
        //runScript();

        ExecutorService es = Executors.newFixedThreadPool(2);
        es.execute(MyReproducer::runScript);
        es.execute(MyReproducer::runScript);
        es.shutdown();
        es.awaitTermination(10, TimeUnit.SECONDS);
    }

    private static void runScript() {
        GroovyShell shell = new GroovyShell();
        shell.evaluate("enum MyEnum {FOO, BAR, BAZ}\nprintln MyEnum.values()");
    }
}

Exception thrown:

Exception in thread "pool-1-thread-1" org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script1.groovy: -1: unable to resolve class java$lang$Enum 
 @ line -1, column -1.
1 error

	at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:310)
	at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:958)
	at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:605)
	at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:554)
	at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:298)
	at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:268)
	at groovy.lang.GroovyShell.parseClass(GroovyShell.java:688)
	at groovy.lang.GroovyShell.parse(GroovyShell.java:700)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:584)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:623)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:594)
	at MyReproducer.runScript(MyReproducer.java:23)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Exception in thread "pool-1-thread-2" java.lang.ExceptionInInitializerError
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray$1.run(CallSiteArray.java:68)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray$1.run(CallSiteArray.java:65)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.createCallStaticSite(CallSiteArray.java:65)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.createCallSite(CallSiteArray.java:162)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117)
	at Script1.run(Script1.groovy:2)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:585)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:623)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:594)
	at MyReproducer.runScript(MyReproducer.java:23)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.TypeNotPresentException: Type java$lang$Enum not present
	at sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(CoreReflectionFactory.java:117)
	at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature(Reifier.java:125)
	at sun.reflect.generics.tree.ClassTypeSignature.accept(ClassTypeSignature.java:49)
	at sun.reflect.generics.repository.ClassRepository.getSuperclass(ClassRepository.java:90)
	at java.lang.Class.getGenericSuperclass(Class.java:777)
	at com.sun.beans.TypeResolver.prepare(TypeResolver.java:308)
	at com.sun.beans.TypeResolver.resolve(TypeResolver.java:185)
	at com.sun.beans.TypeResolver.resolve(TypeResolver.java:218)
	at com.sun.beans.TypeResolver.resolve(TypeResolver.java:169)
	at com.sun.beans.TypeResolver.resolveInClass(TypeResolver.java:81)
	at java.beans.FeatureDescriptor.getReturnType(FeatureDescriptor.java:370)
	at java.beans.PropertyDescriptor.findPropertyType(PropertyDescriptor.java:648)
	at java.beans.PropertyDescriptor.updateGenericsFor(PropertyDescriptor.java:623)
	at java.beans.Introspector.addPropertyDescriptor(Introspector.java:605)
	at java.beans.Introspector.addPropertyDescriptors(Introspector.java:614)
	at java.beans.Introspector.getTargetPropertyInfo(Introspector.java:467)
	at java.beans.Introspector.getBeanInfo(Introspector.java:428)
	at java.beans.Introspector.getBeanInfo(Introspector.java:173)
	at groovy.lang.MetaClassImpl$15.run(MetaClassImpl.java:3318)
	at java.security.AccessController.doPrivileged(Native Method)
	at groovy.lang.MetaClassImpl.addProperties(MetaClassImpl.java:3316)
	at groovy.lang.MetaClassImpl.initialize(MetaClassImpl.java:3293)
	at org.codehaus.groovy.reflection.ClassInfo.getMetaClassUnderLock(ClassInfo.java:260)
	at org.codehaus.groovy.reflection.ClassInfo.getMetaClass(ClassInfo.java:302)
	at org.codehaus.groovy.runtime.metaclass.MetaClassRegistryImpl.getMetaClass(MetaClassRegistryImpl.java:261)
	at org.codehaus.groovy.runtime.InvokerHelper.getMetaClass(InvokerHelper.java:883)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.createCallStaticSite(CallSiteArray.java:75)
	at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallStatic(CallSiteArray.java:56)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callStatic(AbstractCallSite.java:194)
	at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callStatic(AbstractCallSite.java:214)
	at MyEnum.<clinit>(Script1.groovy)
	... 18 more
Caused by: java.lang.ClassNotFoundException: java$lang$Enum
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:677)
	at groovy.lang.GroovyClassLoader$InnerLoader.loadClass(GroovyClassLoader.java:425)
	at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:787)
	at groovy.lang.GroovyClassLoader.loadClass(GroovyClassLoader.java:775)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:348)
	at sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(CoreReflectionFactory.java:114)
	... 48 more

The problem doesn't occur if a script containing an enum declaration was evaluated before. Also every once in a while everything works fine and no error occurs.

Please note: I was unable to reproduce this problem with 2.5.0-alpha-1 but since I didn't find a mention of this bug in the changelog I figured that I should report it nevertheless.

Issue Links

• is duplicated by: GROOVY-8217 java.lang.ClassNotFoundException: java$lang$Enum