Google App Engine — NoSuchMethodError

问题

I am trying to run a JSP in Google App Engine, and I am getting the following error message on my console. Can anyone help? I do have asm-3.3.jar in my classpath.

    WARNING: Error starting handlers
java.lang.NoSuchMethodError: org.objectweb.asm.ClassWriter.<init>(Z)V
    at net.sf.cglib.core.DebuggingClassWriter.<init>(DebuggingClassWriter.java:47)
    at net.sf.cglib.core.DefaultGeneratorStrategy.getClassWriter(DefaultGeneratorStrategy.java:30)
    at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:24)
    at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:215)
    at net.sf.cglib.core.KeyFactory$Generator.create(KeyFactory.java:145)
    at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:117)
    at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:108)
    at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:104)
    at org.hibernate.impl.SessionFactoryImpl.<clinit>(SessionFactoryImpl.java:321)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1005)
    at com.configuration.ConfigurationListener.contextInitialized(ConfigurationListener.java:19)
    at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548)
    at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
    at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
    at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
    at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
    at org.mortbay.jetty.Server.doStart(Server.java:224)
    at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
    at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:196)
    at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:239)
    at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:146)
    at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:189)
    at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
    at com.google.appengine.tools.development.DevAppServerMain.<init>(DevAppServerMain.java:128)
    at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:104)

回答1:

Ok so it's in your classpath for what Eclipse? Do you have it in the WEB_INF/lib for your AE project?

回答2:

Have you checked out this?

Error : java.lang.NoSuchMethodError: org.objectweb.asm.ClassWriter.<init>(I)V

Specifically, it may be a problem with your cglib and asm-attrs versions.

回答3:

I added asm-1.5.2.jar (an earlier version), and that fixed the problem.

来源：https://stackoverflow.com/questions/11067831/google-app-engine-nosuchmethoderror