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https://issues.apache.org/jira/browse/GROOVY-8160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15981962#comment-15981962
]
Michael W commented on GROOVY-8160:
-----------------------------------
{quote}If I get this right you are using two parallel compilation units{quote}I
think so. At least if calling GroovyShell.evaluate in parallel causes two
compilation units to be used.
Also, after this error occurs running code containing enums always fails. You
have to restart the whole process to get rid of this condition.
> 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 W
>
> 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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