SSM Bug记录篇1

1).数据库时间和本地时间相差八小时

解决方案：将连接池的serverTimezone=UTC 替换成serverTimezone=Asia/Shanghai（Mysql8.0需要指定时区）

 

2.）web应用程序[book_war_exploded]创建了一个ThreadLocal，其键类型为[javax.faces.context.FacesContext$1]（值为[javax.faces.context.FacesContext$1@1af09455]），值类型为[com.sun.faces.config.InitFacesContext]（值为[com.sun.faces.config.InitFacesContext@23d98b），但在停止web应用程序时未能将其删除。线程将随着时间的推移而更新，以尝试避免可能的内存泄漏

 

解决方案：这个问题比较复杂和佛系，先尝试删掉taget 重启idea ，重新部署，更换tomcat，重启电脑等 如果还是出现这个问题，查看配置文件和jar包

 

3.）javax.net.ssl.SSLException: closing inbound before receiving peer's close_notify

 

解决方案：mysql8.0更换了新驱动默认检验ssl 需要添加  useSSL=false

 

4.) Public Key Retrieval is not allowed

Caused by: com.mysql.cj.exceptions.CJException: Public Key Retrieval is not allowed
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:124)
at com.mysql.cj.protocol.a.authentication.CachingSha2PasswordPlugin.nextAuthenticationStep(CachingSha2PasswordPlugin.java:151)
at com.mysql.cj.protocol.a.authentication.CachingSha2PasswordPlugin.nextAuthenticationStep(CachingSha2PasswordPlugin.java:49)
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.proceedHandshakeWithPluggableAuthentication(NativeAuthenticationProvider.java:596)
at com.mysql.cj.protocol.a.NativeAuthenticationProvider.connect(NativeAuthenticationProvider.java:202)
at com.mysql.cj.protocol.a.NativeProtocol.connect(NativeProtocol.java:1449)
at com.mysql.cj.NativeSession.connect(NativeSession.java:165)
at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:849)
... 91 more

解决方案 ：暂未解决 在连接池连接添加 allowPublicKeyRetrieval=true

官方解释

5.）java.lang.NoSuchMethodException

java.lang.NoSuchMethodException: ***.***.***.<init>() java.base/java.lang.Class.getConstructor0(Class.java:3349) java.base/java.lang.Class.getDeclaredConstructor(Class.java:2553) org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:102) org.springframework.web.method.annotation.ModelAttributeMethodProcessor.createAttribute(ModelAttributeMethodProcessor.java:142) org.springframework.web.servlet.mvc.method.annotation.ServletModelAttributeMethodProcessor.createAttribute(ServletModelAttributeMethodProcessor.java:80) org.springframework.web.method.annotation.ModelAttributeMethodProcessor.resolveArgument(ModelAttributeMethodProcessor.java:102) org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:160) org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:129) org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) javax.servlet.http.HttpServlet.service(HttpServlet.java:652) org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) javax.servlet.http.HttpServlet.service(HttpServlet.java:733) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

解决方案：在对应实体类添加一个无参构造方法