奇怪的groovy类加载异常

我们希望将groovy/grails用作Glassfish远程客户端，但我们遇到了奇怪的类加载问题

首先是Testcode，当通过groovy/grails调用时，它会触发错误。 当它通过java调用时，这很好。 当通过groovy运行时，它会触发 java.lang.ClassCastException:com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject不能强制转换为javax.rmi.corba.PortableRemoteObjectDelegate 在PortableRemoteObject.java中：77 在该错误之前，可以手动进行该转换

==========来源==========

package test;

import java.lang.reflect.Field;

public class J2EETest {
   public static void main(String[] args) throws Exception {
            new J2EETest().classLoaderTest();
   }

   public static void classLoaderTest() throws Exception {
           ClassLoader classLoader = J2EETest.class.getClassLoader();
           ClassLoader threadClassLoader = Thread.currentThread().getContextClassLoader();
           System.out.println("classLoader: " + classLoader);
           System.out.println("threadClassLoader: " + threadClassLoader);

           Class klass = Class.forName( "com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject", false, threadClassLoader );
           Object obj = klass.newInstance();
           System.out.println("Object -> " + obj.toString());
           // This works
           javax.rmi.CORBA.PortableRemoteObjectDelegate del = (javax.rmi.CORBA.PortableRemoteObjectDelegate) obj;
             try {
                 System.out.println("Init of javax.rmi.PortableRemoteObject");
                   // This doesn't work ! 
                   System.out.println( Class.forName("javax.rmi.PortableRemoteObject", true, threadClassLoader));
                   Class prOklass = javax.rmi.PortableRemoteObject.class;
                   Field staticfield = prOklass.getDeclaredField("proDelegate");
                   staticfield.setAccessible(true);
                   System.out.println("Reflection: PortableRemoteObject.proDelegate ->" + staticfield.get(null));
                   System.out.println("OK");
               }
               catch(Throwable e) {
                   System.err.println("BOOM");
                   e.printStackTrace();
              }

  }

  }

=======JAVA测试运行=======

$ export CLASSPATH=build:lib/glassfish/gf-client-module.jar     # gf-client-module.jar -> GLASSFISH-Client Libs
$ java  -Djavax.rmi.CORBA.PortableRemoteObjectClass=com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject test.J2EETest 
classLoader: sun.misc.Launcher$AppClassLoader@e776f7
threadClassLoader: sun.misc.Launcher$AppClassLoader@e776f7
Object -> com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject@5511e28
Init of javax.rmi.PortableRemoteObject class javax.rmi.PortableRemoteObject
Reflection: PortableRemoteObject.proDelegate -> com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject@20e5f01b

OK

======现在是Groovy版本=======

$ groovy -Djavax.rmi.CORBA.PortableRemoteObjectClass=com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject -e "test.J2EETest.classLoaderTest()"
classLoader: org.codehaus.groovy.tools.RootLoader@5dcba031
threadClassLoader: org.codehaus.groovy.tools.RootLoader@5dcba031
Object -> com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject@1bf3f158
Init of javax.rmi.PortableRemoteObject

BOOM

java.lang.ExceptionInInitializerError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at test.J2EETest.classLoaderTest(J2EETest.java:83)
at test.J2EETest$classLoaderTest.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:42)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:112)
at script_from_command_line.run(script_from_command_line:1)

at groovy.lang.GroovyShell.runScriptOrMainOrTestOrRunnable(GroovyShell.java:266)
at groovy.lang.GroovyShell.run(GroovyShell.java:517)
at groovy.lang.GroovyShell.run(GroovyShell.java:172)
at groovy.ui.GroovyMain.processOnce(GroovyMain.java:553)
at groovy.ui.GroovyMain.run(GroovyMain.java:337)
at groovy.ui.GroovyMain.process(GroovyMain.java:323)
at groovy.ui.GroovyMain.processArgs(GroovyMain.java:120)
at groovy.ui.GroovyMain.main(GroovyMain.java:100)     

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.codehaus.groovy.tools.GroovyStarter.rootLoader(GroovyStarter.java:108)
at org.codehaus.groovy.tools.GroovyStarter.main(GroovyStarter.java:130)

Caused by: java.lang.ClassCastException: com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject cannot be cast to   javax.rmi.CORBA.PortableRemoteObjectDelegate   at javax.rmi.PortableRemoteObject.<clinit>(PortableRemoteObject.java:77)
 ... 22 more

嗯

有没有人遇到过类似的问题，或者知道如何让代码正常工作

问候

---

弗兰克

我试着运行你的示例，我得到：

classLoader: groovy.lang.GroovyClassLoader$InnerLoader@538d7ace
threadClassLoader: groovy.lang.GroovyClassLoader@1e22ab57
Caught: java.lang.ClassNotFoundException: com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject
java.lang.ClassNotFoundException: com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject
    at java_lang_Class$forName.call(Unknown Source)
    at test.J2EETest.classLoaderTest(J2EETest.groovy:16)
    at test.J2EETest$classLoaderTest.call(Unknown Source)
    at test.J2EETest.main(J2EETest.groovy:7)

---

我所能提出的最好建议是将变化的事物隔离开来。最可能的罪魁祸首是在这两种情况下使用的JVM。将用于执行groovy的JVM与用于直接运行jar的JVM进行比较。我还建议将groovy-all.jar放到类路径中，并尝试从Java运行groovy解释器

这不是同一个问题吗？是的，但以更简单的方式，不再直接依赖glassfish。我想前一个话题可以结束了。

classLoader: groovy.lang.GroovyClassLoader$InnerLoader@538d7ace
threadClassLoader: groovy.lang.GroovyClassLoader@1e22ab57
Caught: java.lang.ClassNotFoundException: com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject
java.lang.ClassNotFoundException: com.sun.corba.ee.impl.javax.rmi.PortableRemoteObject
    at java_lang_Class$forName.call(Unknown Source)
    at test.J2EETest.classLoaderTest(J2EETest.groovy:16)
    at test.J2EETest$classLoaderTest.call(Unknown Source)
    at test.J2EETest.main(J2EETest.groovy:7)