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我真的很难过。我已经将我们的 Spring 库从 4.0.6 升级到 4.3.2。我们的一个测试在使用 4.3.2 运行时失败。这是有问题的代码：

@Bean(name = SCHEDULER_FACTORY)
public SchedulerFactoryBean getSchedulerFactory()
{
    SchedulerFactoryBean schedulerFactory = new SchedulerFactoryBean();
    schedulerFactory.setConfigLocation(schedulerConfig);
    schedulerFactory.setResourceLoader(null);
    schedulerFactory.setDataSource(dataSource);
    schedulerFactory.setJobFactory(getSchedulerJobFactory());
    schedulerFactory.setAutoStartup(false);

    return schedulerFactory;
}

@Bean(name = SCHEDULER)
public Scheduler getScheduler()
{
    return getSchedulerFactory().getScheduler();
}

我得到了错误java.lang.ClassFormatError: Duplicate method name&signature in class file org/springframework/scheduling/quartz/SchedulerFactoryBean$$EnhancerBySpringCGLIB$$bee87fe8$$EnhancerBySpringCGLIB$$6bb26669。

使用 spring 4.0.6 框架运行测试工作得很好，但是使用 4.3.2，它失败了。使用 4.0.6 时，我使用的是 cglib 无依赖库。在 4.3.2 中，无论我是否使用 cglib，测试都会失败。

Spring 将 cglib 和 objensis 嵌入到 4.3.* 核心库中。“此外，Spring Framework 4.3 在 spring-core.jar 中嵌入了更新的 ASM 5.1、CGLIB 3.2.4 和 Objenesis 2.4。” SpringDocs

我们使用 Java 8 和 cglib-no-dep 2.2 和 Spring 框架 4.0.6。我们尝试在有和没有独立库的情况下运行此代码，并看到相同的结果。

堆栈跟踪：

  Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.quartz.Scheduler]: Factory method 'getScheduler' threw exception; nested exception is org.springframework.cglib.core.CodeGenerationException:java.lang.reflect.InvocationTargetException  >null
           at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)
           at org.springframework.beans.factory.support.ConstructorResolver$3.run(ConstructorResolver.java:582)
           at java.security.AccessController.doPrivileged(Native Method)
           at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579)
           ... 112 more
  Caused by: org.springframework.cglib.core.CodeGenerationException: java.lang.reflect.InvocationTargetException  >null
           at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:345)
           at org.springframework.cglib.proxy.Enhancer.generate(Enhancer.java:492)
           at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:93)
  Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 188.486 sec
           at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:91)
           at org.springframework.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54)
           at java.util.concurrent.FutureTask.run(FutureTask.java:266)
           at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61)
           at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34)
           at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:116)
           at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:291)
           at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:480)
           at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:337)
           at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.enhanceFactoryBean(ConfigurationClassEnhancer.java:452)
           at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:338)
           at com.example.SpringConfiguration$$EnhancerBySpringCGLIB$$54d3cb35.getSchedulerFactory(<generated>)
           at com.example.SpringConfiguration.getScheduler(SpringConfiguration.java:242)
           at com.example.SpringConfiguration$$EnhancerBySpringCGLIB$$54d3cb35.CGLIB$getScheduler$24(<generated>)
           at com.example.SpringConfiguration$$EnhancerBySpringCGLIB$$54d3cb35$$FastClassBySpringCGLIB$$a2a6e004.invoke(<generated>)
           at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
           at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356)
           at com.example.SpringConfiguration$$EnhancerBySpringCGLIB$$54d3cb35.getScheduler(<generated>)
           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 org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
           ... 115 more
  Caused by: java.lang.reflect.InvocationTargetException
           at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source)
           at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
           at java.lang.reflect.Method.invoke(Method.java:498)
           at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:413)
           at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:336)
           ... 140 more
  Caused by: java.lang.ClassFormatError: Duplicate method name&signature in class file org/springframework/scheduling/quartz/SchedulerFactoryBean$$EnhancerBySpringCGLIB$$bee87fe8$$EnhancerBySpringCGLIB$$6bb26669
           at java.lang.ClassLoader.defineClass1(Native Method)
           at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
           ... 145 more
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1 回答 1

0

这绝对是 cglib 中的一个错误。似乎它没有正确地将类型层次结构中的方法确定为等于另一种方法。您是否将 Java 8 与接口中的默认方法结合使用？

Cglib 并没有真正针对现代 Java 版本进行测试，并且只需要很少的维护。使用库时，较新的功能有时会引起麻烦。

于 2016-09-25T00:10:17.343 回答