ngrinder启动项目时报错Error creating bean with name ‘emf‘ defined in org.ngrinder.infra.config.DatabaseConf

这个类似的问题遇到过好几次吧，但每次报错还是可以找的到错误的，报错的时候想一下前面你修改了啥，再去看看对应的代码，是否路径一样了。或者属性的问题。但这次报错我暂时还找不到，我修改前的上一个版本还是可以启动的，第二天来上班，一启动就报错了。目前还未解决，如果解决了则会贴上答案。下面时报错原因：

代码文本：

01-Dec-2021 18:58:11.804 信息 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.ApplicationContext.log Spring WebApplicationInitializers detected on classpath: [org.springframework.boot.autoconfigure.jersey.JerseyAutoConfiguration$JerseyWebApplicationInitializer@b0ebd27]
01-Dec-2021 18:58:11.953 信息 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.ApplicationContext.log Initializing Spring root WebApplicationContext
01-Dec-2021 18:58:15.892 严重 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.StandardContext.listenerStart 异常将上下文初始化事件发送到类的侦听器实例.[org.springframework.web.context.ContextLoaderListener]at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.preparePersistenceUnitInfos(DefaultPersistenceUnitManager.java:470)at org.springframework.orm.jpa.persistenceunit.DefaultPersistenceUnitManager.afterPropertiesSet(DefaultPersistenceUnitManager.java:424)at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:310)at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:319)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)... 59 more
01-Dec-2021 18:58:15.911 信息 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.ApplicationContext.log Closing Spring root WebApplicationContextorg.springframework.beans.factory.BeanCreationException: Error creating bean with name 'emf' defined in org.ngrinder.infra.config.DatabaseConfig: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Conflicting persistence unit definitions for name 'ngrinder': file:/D:/zaixianStudy/0server/apache-tomcat-8.5.69/webapps/ngrinder-web/WEB-INF/lib/ngrinder-controller-3.4.4.jar, file:/D:/zaixianStudy/0server/apache-tomcat-8.5.69/webapps/ngrinder-web/WEB-INF/classesat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)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.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1054)at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:829)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444)at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326)at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4763)at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5232)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:755)at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:729)at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:695)at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1775)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.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:291)at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:483)at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:431)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.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:291)at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)at com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:468)at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)at java.security.AccessController.doPrivileged(Native Method)at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1408)at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)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 sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357)at sun.rmi.transport.Transport$1.run(Transport.java:200)at sun.rmi.transport.Transport$1.run(Transport.java:197)at java.security.AccessController.doPrivileged(Native Method)at sun.rmi.transport.Transport.serviceCall(Transport.java:196)at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)at java.security.AccessController.doPrivileged(Native Method)at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)Caused by: java.lang.IllegalStateException: Conflicting persistence unit definitions for name 'ngrinder': file:/D:/zaixianStudy/0server/apache-tomcat-8.5.69/webapps/ngrinder-web/WEB-INF/lib/ngrinder-controller-3.4.4.jar, file:/D:/zaixianStudy/0server/apache-tomcat-8.5.69/webapps/ngrinder-web/WEB-INF/classes

问题得以解决，下面说说我的处理方式，扯淡的话我就不说了，那些什么接口的url一样啊、没加注解、方法名一样、引错包、版本不一样、pom文件重复或者引入了多个版本不一致，还有什么reset项目清空maven重新下载的，我就不说了，我已经碰到过很多次了，也都试过了。网上的答案都是一样的，抄来抄去。我得情况是这样的，第一天能够运行，第二天就不行了，报的错我也是很没头绪，再三的检查了我提交git的代码，发现没有什么错的地方，无从下手。于是我做了以下的工作：

1.找到本地的tomcat，将webApp中的jar包和编译出来的项目文件删掉，并删除项目中的tomcat配置，重新配了一遍

2.检查maven是否配置的对不对，maven是不是自己的，settings.xml文件对不对，以及仓库。我自己的tomcat、maven、jdk本地有很多个版本，我是之前为了测试版本之间的区别，所以下载了很多。检查完毕后点击右侧的导航栏，圆圈，刷新，多刷几次

3.点击左上角的file>>>>ProjectStructure>>>modules,全部删除，重新引入

4.检查Artifacts是否正确，该有的都得有

5.右侧导航栏，刷新maven，clear、complie、package，run，解决了我的问题。

以上就是我的解决方案了。我是代码没有问题，用的这种方式，代码有问题的话，还是别用了

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ngrinder启动项目时报错Error creating bean with name ‘emf‘ defined in org.ngrinder.infra.config.DatabaseConf

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