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via GitHub by martin-g
, 1 year ago
java.lang.reflect.InvocationTargetException-->null
java.lang.LinkageError: loader (instance of  org/eclipse/jetty/webapp/WebAppClassLoader): attempted  duplicate class definition for name: "org/apache/wicket/jmx/Application"	at java.lang.ClassLoader.defineClass1(Native Method)	at java.lang.ClassLoader.defineClass(ClassLoader.java:763)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at net.sf.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:409)	at net.sf.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:323)	at net.sf.cglib.proxy.Enhancer.generate(Enhancer.java:445)	at net.sf.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:85)	at net.sf.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:83)	at net.sf.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54)	at java.util.concurrent.FutureTask.run(FutureTask.java:266)	at net.sf.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61)	at net.sf.cglib.core.internal.LoadingCache.get(LoadingCache.java:34)	at net.sf.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:108)	at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:282)	at net.sf.cglib.proxy.Enhancer.nextInstance(Enhancer.java:643)	at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:286)	at net.sf.cglib.proxy.Enhancer.createHelper(Enhancer.java:433)	at net.sf.cglib.proxy.Enhancer.create(Enhancer.java:304)	at org.apache.wicket.jmx.Initializer.createProxy(Initializer.java:295)	at org.apache.wicket.jmx.Initializer.register(Initializer.java:249)	at org.apache.wicket.jmx.Initializer.init(Initializer.java:192)	at org.apache.wicket.Application.initInitializers(Application.java:568)	at org.apache.wicket.Application.initApplication(Application.java:776)	at org.apache.wicket.protocol.http.WicketFilter.init(WicketFilter.java:431)	at org.apache.wicket.protocol.http.WicketFilter.init(WicketFilter.java:355)	at org.eclipse.jetty.servlet.FilterHolder.initialize(FilterHolder.java:137)	at org.eclipse.jetty.servlet.ServletHandler.initialize(ServletHandler.java:856)	at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:346)	at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1380)	at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1342)	at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:772)	at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:259)	at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:518)	at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)	at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)	at org.eclipse.jetty.server.Server.start(Server.java:405)	at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:106)	at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)	at org.eclipse.jetty.server.Server.doStart(Server.java:372)	at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)	at org.apache.wicket.examples.StartExamples.main(StartExamples.java:110)