java - 升级到 Java 7 后 Spring (3.2.0) ConfigurationClassEnhancer 中出现 Stackoverflow 错误

Question

我们有几个 @Configuration 注解的类，该应用程序在 sun-jdk-6 上运行良好，但升级到 oracle-jdk-7 后发生了 SO 错误。

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cacheManagerPeerProviderFactory' defined in class path resource [com/egnyte/filestore/cache/CacheManagerPeerProviderConfigurationProvider.class]: Instantiation of bean failed; nested exception is 
org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public java.lang.Object com.egnyte.filestore.cache.CacheManagerPeerProviderConfigurationProvider.get()] threw exception; nested exception is java.lang.StackOverflowError
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:181)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1029)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:925)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:490)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:297)
    at com.egnyte.filestore.cache.CacheManagerPeerProviderConfigurationProvider$$EnhancerByCGLIB$$6b65bac9.get(<generated>)
    at com.egnyte.filestore.cache.CacheManagerPeerProviderConfigurationProvider.get(CacheManagerPeerProviderConfigurationProvider.java:22)
    at com.egnyte.filestore.cache.CacheManagerPeerProviderConfigurationProvider$$EnhancerByCGLIB$$6b65bac9.CGLIB$get$0(<generated>)
    at com.egnyte.filestore.cache.CacheManagerPeerProviderConfigurationProvider$$EnhancerByCGLIB$$6b65bac9$$FastClassByCGLIB$$1a8904d5.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:285)
    at com.egnyte.filestore.cache.CacheManagerPeerProviderConfigurationProvider$$EnhancerByCGLIB$$6b65bac9.get(<generated>)
    at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
[SNAP...]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:160)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1029)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:925)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:490)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:297)
    at foo.bar.cache.CacheManagerPeerProviderConfigurationProvider$$EnhancerByCGLIB$$6b65bac9.get(<generated>)
    at foo.bar.cache.CacheManagerPeerProviderConfigurationProvider.get(CacheManagerPeerProviderConfigurationProvider.java:22)
    at foo.bar.cache.CacheManagerPeerProviderConfigurationProvider$$EnhancerByCGLIB$$6b65bac9.CGLIB$get$0(<generated>)
    at foo.bar.cache.CacheManagerPeerProviderConfigurationProvider$$EnhancerByCGLIB$$6b65bac9$$FastClassByCGLIB$$1a8904d5.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:285)
    at foo.bar.cache.CacheManagerPeerProviderConfigurationProvider$$EnhancerByCGLIB$$6b65bac9.get(<generated>)
    at sun.reflect.GeneratedMethodAccessor27.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:160)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1029)

请注意，foo.bar.cache.CacheManagerPeerProviderConfigurationProvider.get(CacheManagerPeerProviderConfigurationProvider.java:22) 指向带有 @Configuration 注释的一行代码，而不是实际的 get() 实现。

默认代理模式为“否”。 这个类没有什么奇特的:

@Configuration
class CacheManagerPeerProviderConfigurationProvider implements Provider<Foo<?>> { 

    @Inject
    private List<Pair<String, Integer>> peers;

    @Override
    @Bean(name = CACHE_MANAGER_PEER_PROVIDER_FACTORY)
    public Foo<?> get() { 
        return new Foo(peers);    
    }
}

这是 Spring 中的错误吗？是否可以禁用增强器？

Answer 1

好的，所以这肯定是 Spring 中的一个错误。

要解决此问题，请删除 Provider<>接口(interface)，因此使 get()方法是一种常规方法，而不是被重写(似乎是 Provider 接口(interface)搞乱了内部 Spring 管道，而不是方法本身是重写)。使您的依赖项与 jsr-330 兼容就这么多了。

@Configuration
class CacheManagerPeerProviderConfigurationProvider 
  //implements Provider<Foo<?>> 
    { 

    @Inject
    private List<Pair<String, Integer>> peers;

    //@Override
    @Bean(name = CACHE_MANAGER_PEER_PROVIDER_FACTORY)
    public Foo<?> get() { 
        return new Foo(peers);    
    }
}

有效!

作为替代解决方案，更改 @Configuration至@Component或@Named

@Named
class CacheManagerPeerProviderConfigurationProvider implements Provider<Foo<?>> 
    { 

    @Inject
    private List<Pair<String, Integer>> peers;

    @Override
    @Bean(name = CACHE_MANAGER_PEER_PROVIDER_FACTORY)
    public Foo<?> get() { 
        return new Foo(peers);    
    }
}

已解决 in SPR-11830