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POWhy/How am I getting the error: NoClassDefFoundError: org/springframework/aop/framework/ProxyFactory
 

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  1. POWhy/How am I getting the error: NoClassDefFoundError: org/springframework/aop/framework/ProxyFactory
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    <p><strong>Goal:</strong> Start up a server which supports remote access to method calls.</p> <p>The application doesn't fail till after all services are created.</p> <p>The jar is in the target/lib directory.</p> <p><strong>Parent pom has the dependency:</strong></p> <pre><code>&lt;dependency&gt; &lt;groupId&gt;org.springframework&lt;/groupId&gt; &lt;artifactId&gt;spring-aop&lt;/artifactId&gt; &lt;version&gt;${version.spring}&lt;/version&gt; &lt;/dependency&gt; </code></pre> <p><strong>Note:</strong> I am able to create a spring bean of type: org.springframework.aop.framework.ProxyFactory</p> <p><strong>Stack Trace:</strong></p> <pre> 36438 [main] ERROR org.springframework.web.context.ContextLoader - Context initialization failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.remoting.rmi.RmiServiceExporter#0' defined in class path resource [application-context-service-web-server.xml]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/springframework/aop/framework/ProxyFactory at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1338) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409) at java.security.AccessController.doPrivileged(Native Method) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:728) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3795) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4252) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:760) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:740) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:544) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1150) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:120) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1022) at org.apache.catalina.core.StandardHost.start(StandardHost.java:736) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1014) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443) at org.apache.catalina.core.StandardService.start(StandardService.java:448) at org.apache.catalina.core.StandardServer.start(StandardServer.java:700) at org.apache.catalina.startup.Catalina.start(Catalina.java:552) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433) Caused by: java.lang.NoClassDefFoundError: org/springframework/aop/framework/ProxyFactory at org.springframework.remoting.support.RemoteExporter.getProxyForService(RemoteExporter.java:156) at org.springframework.remoting.rmi.RmiBasedExporter.getObjectToExport(RmiBasedExporter.java:61) at org.springframework.remoting.rmi.RmiServiceExporter.prepare(RmiServiceExporter.java:268) at org.springframework.remoting.rmi.RmiServiceExporter.afterPropertiesSet(RmiServiceExporter.java:227) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1369) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1335) ... 39 more </pre> <p><strong>application-context-service-web-server.xml:</strong></p> <pre><code>&lt;bean class="org.springframework.remoting.rmi.RmiServiceExporter"&gt; &lt;!-- does not necessarily have to be the same name as the bean to be exported --&gt; &lt;property name="serviceName" value="Manager1" /&gt; &lt;property name="service" ref="manager1" /&gt; &lt;property name="serviceInterface" value="com.service.Manager1" /&gt; &lt;!-- defaults to 1099 --&gt; &lt;property name="registryPort" value="1199" /&gt; &lt;/bean&gt; &lt;bean class="org.springframework.remoting.rmi.RmiServiceExporter"&gt; &lt;!-- does not necessarily have to be the same name as the bean to be exported --&gt; &lt;property name="serviceName" value="Manager2" /&gt; &lt;property name="service" ref="manager2" /&gt; &lt;property name="serviceInterface" value="com.service.Manager2" /&gt; &lt;!-- defaults to 1099 --&gt; &lt;property name="registryPort" value="1199" /&gt; &lt;/bean&gt; &lt;bean id="manager1" class="com.service.impl.Manager1Impl"&gt; ... &lt;/bean&gt; &lt;bean id="manager2" class="com.service.impl.Manager2Impl"&gt; ... &lt;/bean&gt; </code></pre> <p><strong>NOTE:</strong> This works, but the above still fails</p> <pre><code>&lt;bean id="proxied" class="org.springframework.aop.framework.ProxyFactory" /&gt; </code></pre> <pre>Thread [main] (Suspended (entry into method in ProxyFactory)) ProxyFactory.() line: 40 NativeConstructorAccessorImpl.newInstance0(Constructor, Object[]) line: not available [native method] NativeConstructorAccessorImpl.newInstance(Object[]) line: 39 DelegatingConstructorAccessorImpl.newInstance(Object[]) line: 27 Constructor.newInstance(Object...) line: 494 </pre>
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    1. COI just put a breakpoint at the constructor for ProxyFactory and my bean was successfully created as a standalone bean which is a proxy factory.
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