Michael Walser created GROOVY-8160:
--------------------------------------
Summary: Exception when evaluating two Groovy scripts containing
an enum in parallel
Key: GROOVY-8160
URL: https://issues.apache.org/jira/browse/GROOVY-8160
Project: Groovy
Issue Type: Bug
Affects Versions: 2.4.10
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)
Reporter: Michael Walser
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:
{code}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()");
}
}{code}
Exception thrown: {noformat}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{noformat}
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.
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