今天在修改Controller的类名之后出现了个令我十分费解的有关tomcat问题。

出现问题的过程：我先是在我的分支上修改了NoviceLoginController的名字，改为了NoviceLoginRewardController之后，提交了代码，并且合到了测试环境，ps aux |grep xxx找到该api的进程号，kill掉之后startup  tomcat然后就开始无限的弹出这个错误了。我怀疑是tomcat的启动时，代码中同时存在改名前和改名后两个文件，从而导致出现了两个相同的@RequestMapping地址。但是不知道为什么会出现这种情况。

问题详情如下：

2018-03-12-10:53:37,160 -- ERROR [http-bio-7731-exec-1] {org.springframework.web.servlet.DispatcherServlet:502} - Context initialization failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping': Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'noviceLoginRewardController' method

public com.wb.api.common.HttpRespBase com.wb.home.controller.NoviceLoginRewardController.getRewardsListInfo(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)

to {[/v3/home/getNovicePopWindowInfo],methods=[POST]}: There is already 'noviceLoginController' bean method

public com.wb.api.common.HttpRespBase com.wb.home.controller.NoviceLoginController.getRewardsListInfo(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) mapped.

:

        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)

        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)

        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)

        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)

        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)

        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)

        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)

        at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668)

        at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634)

        at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682)

        at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553)

        at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494)

        at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)

        at javax.servlet.GenericServlet.init(GenericServlet.java:158)

        at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1269)

        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1182)

        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1072)

        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5368)

        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5660)

        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)

        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1571)

        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1561)

        at java.util.concurrent.FutureTask.run(FutureTask.java:266)

        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

        at java.lang.Thread.run(Thread.java:745)

Caused by: java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'noviceLoginRewardController' method

public com.wb.api.common.HttpRespBase com.wb.home.controller.NoviceLoginRewardController.getRewardsListInfo(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)

to {[/v3/home/getNovicePopWindowInfo],methods=[POST]}: There is already 'noviceLoginController' bean method

public com.wb.api.common.HttpRespBase com.wb.home.controller.NoviceLoginController.getRewardsListInfo(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) mapped.

        at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$MappingRegistry.assertUniqueMethodMapping(AbstractHandlerMethodMapping.java:560)

        at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$MappingRegistry.register(AbstractHandlerMethodMapping.java:524)

        at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.registerHandlerMethod(AbstractHandlerMethodMapping.java:250)

        at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.detectHandlerMethods(AbstractHandlerMethodMapping.java:226)

        at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:191)

        at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.afterPropertiesSet(AbstractHandlerMethodMapping.java:161)

        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.afterPropertiesSet(RequestMappingHandlerMapping.java:125)

        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)

        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)

        ... 28 more