为什么登录过后，左边的导航栏一直显示不出来，点刷新直接报404 ，直接撒都看不到。

老师我突然有个疑问，什么时候API要暴露在注册中心，什么样的API可以交由spring自己管理？

比如视频中，SchedulingService如果用spring框架的@Service也可以被其他服务调用，同理UserService如果用dubbo的@Service也可以交由Dubbo托管呀

UserService SchedulingService

这个项目总共要用到几个服务器呀

这个对象和这个对象调用的方法是什么？是mybatisplus专有的吗？？？？？？？？？

启动erpapplicaiton报zookeeper连不上是什么原因？服务器zookeeper已经启动，对应端口也开放了，用zo

oinspector测试zookeeper也能连上zookeeper。pom依赖也导入也没错，配置文件ip:port也没问题

，

如何解决连接超时的问题？？？？我的别的配置都是OK的

老师我想问一下，为啥我的提示需要构造器，而老师的源码实体类里没有构造器，也没报错？

然后我在那个实体类里面生成构造器，代码不报错，启动时会报错。

然后我把那个构造器按照代码提示写成这样，代码不报错，启动也可以启动了，这样做正确吗

并且，在那个接口实现类里面需要的get方法，我的是在实体类里生成的，但是老师源码实体类里面没有，但是可以调用，这个是哪里来的？

老师，zookeeper一直连不上。查了端口没问题，超时时长也重新设置了，用那个测试工具也能连上。还有可能是哪里有问题啊

老师，运行后出现这个界面，是什么原因导致的？

怎么启动的？我的为什么读不到common-dev.yml里面的配置文件，只有改成application.yml才能读到，读不到的话引入了mybatis-plus的依赖启动不了啊还有也注册不到nacos上

老师，想问下，对于个人而言，购买哪种服务器比较好呢，有推荐嘛

怎么启动的？我的为什么读不到common-dev.yml里面的配置文件，只有改成application.yml才能读到，读不到的话引入了mybatis-plus的依赖启动不了啊还有也注册不到nacos

问题描述：

    1.安装课程我配置了下图的methods(此前的功能都是正常的)

    2.但是没用，无论retries设置为多少-1、0、1、5，添加方法的结果都是数据库会多出三条一样的数据。不知为何注解里的这个methods完全没起作用。

老师为什么我登录的时候intelliJ会提示下面的异常？不知道哪里会time out或者为什么会time out呢。。完全没有头绪啊。。

java.net.ConnectException: Operation timed out (Connection timed out)

at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_211]

at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_211]

at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_211]

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_211]

at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_211]

at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_211]

at redis.clients.jedis.Connection.connect(Connection.java:181) ~[jedis-3.1.0.jar:na]

at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:100) ~[jedis-3.1.0.jar:na]

at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1866) ~[jedis-3.1.0.jar:na]

at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:117) ~[jedis-3.1.0.jar:na]

at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:889) ~[commons-pool2-2.7.0.jar:2.7.0]

at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:424) ~[commons-pool2-2.7.0.jar:2.7.0]

at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:349) ~[commons-pool2-2.7.0.jar:2.7.0]

at redis.clients.jedis.util.Pool.getResource(Pool.java:50) ~[jedis-3.1.0.jar:na]

at redis.clients.jedis.JedisPool.getResource(JedisPool.java:234) ~[jedis-3.1.0.jar:na]

at org.crazycake.shiro.RedisManager.getJedis(RedisManager.java:35) ~[shiro-redis-3.2.3.jar:na]

at org.crazycake.shiro.WorkAloneRedisManager.get(WorkAloneRedisManager.java:50) ~[shiro-redis-3.2.3.jar:na]

at org.crazycake.shiro.RedisSessionDAO.doReadSession(RedisSessionDAO.java:152) ~[shiro-redis-3.2.3.jar:na]

at org.apache.shiro.session.mgt.eis.AbstractSessionDAO.readSession(AbstractSessionDAO.java:168) ~[shiro-core-1.3.2.jar:1.3.2]

at org.apache.shiro.session.mgt.DefaultSessionManager.retrieveSessionFromDataSource(DefaultSessionManager.java:236) ~[shiro-core-1.3.2.jar:1.3.2]

at org.apache.shiro.session.mgt.DefaultSessionManager.retrieveSession(DefaultSessionManager.java:222) ~[shiro-core-1.3.2.jar:1.3.2]

at org.apache.shiro.session.mgt.AbstractValidatingSessionManager.doGetSession(AbstractValidatingSessionManager.java:118) ~[shiro-core-1.3.2.jar:1.3.2]

at org.apache.shiro.session.mgt.AbstractNativeSessionManager.lookupSession(AbstractNativeSessionManager.java:148) ~[shiro-core-1.3.2.jar:1.3.2]

at org.apache.shiro.session.mgt.AbstractNativeSessionManager.getSession(AbstractNativeSessionManager.java:140) ~[shiro-core-1.3.2.jar:1.3.2]

at org.apache.shiro.mgt.SessionsSecurityManager.getSession(SessionsSecurityManager.java:156) ~[shiro-core-1.3.2.jar:1.3.2]

at org.apache.shiro.mgt.DefaultSecurityManager.resolveContextSession(DefaultSecurityManager.java:456) ~[shiro-core-1.3.2.jar:1.3.2]

at org.apache.shiro.mgt.DefaultSecurityManager.resolveSession(DefaultSecurityManager.java:442) ~[shiro-core-1.3.2.jar:1.3.2]

at org.apache.shiro.mgt.DefaultSecurityManager.createSubject(DefaultSecurityManager.java:338) ~[shiro-core-1.3.2.jar:1.3.2]

at org.apache.shiro.subject.Subject$Builder.buildSubject(Subject.java:846) ~[shiro-core-1.3.2.jar:1.3.2]

at org.apache.shiro.web.subject.WebSubject$Builder.buildWebSubject(WebSubject.java:148) ~[shiro-web-1.5.3.jar:1.5.3]

at org.apache.shiro.web.servlet.AbstractShiroFilter.createSubject(AbstractShiroFilter.java:292) ~[shiro-web-1.5.3.jar:1.5.3]

at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:359) ~[shiro-web-1.5.3.jar:1.5.3]

at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) ~[shiro-web-1.5.3.jar:1.5.3]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.33.jar:9.0.33]

at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.5.RELEASE.jar:5.2.5.RELEASE]

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.5.RELEASE.jar:5.2.5.RELEASE]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.33.jar:9.0.33]

at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.5.RELEASE.jar:5.2.5.RELEASE]

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.5.RELEASE.jar:5.2.5.RELEASE]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.33.jar:9.0.33]

at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.5.RELEASE.jar:5.2.5.RELEASE]

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.5.RELEASE.jar:5.2.5.RELEASE]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) [tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1594) [tomcat-embed-core-9.0.33.jar:9.0.33]

at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.33.jar:9.0.33]

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_211]

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_211]

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.33.jar:9.0.33]

at java.lang.Thread.run(Thread.java:748) [na:1.8.0_211]