How make 500 state visit to the home page-CodePudding

Javax.mail. Servlet domain has already been set up, and an error as follows, struggle for a long time also don't understand,
严重: Servlet.service() for servlet [jsp] in context with path [] threw exception [java.lang.LinkageError: loader constraint violation: when resolving method "org.apache.jasper.runtime.InstanceManagerFactory.getInstanceManager(Ljavax/servlet/ServletConfig;)Lorg/apache/tomcat/InstanceManager;" the class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/index_jsp, and the class loader (instance of org/codehaus/plexus/classworlds/realm/ClassRealm) for the method's defining class, org/apache/jasper/runtime/InstanceManagerFactory, have different Class objects for the type org/apache/tomcat/InstanceManager used in the signature] with root cause
Java. Lang. LinkageError: loader constraint violation: when resolving method "org. Apache. Jasper. Runtime. InstanceManagerFactory. GetInstanceManager (Ljavax/servlet/ServletConfig;) Lorg/apache/tomcat/InstanceManager;" (the instance of the class loader org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/JSP/index_jsp, and the class loader (the instance of org/codehaus/breadth/classworlds/realm/ClassRealm) for the method 's defining class, org/apache/jasper/runtime/InstanceManagerFactory, have the company class objects for type org/apache/tomcat/InstanceManager informs in the signature 
The at org. Apache. JSP. Index_jsp. _jspInit (index_jsp. Java: 33) 
The at org. Apache. Jasper. Runtime. HttpJspBase. Init (HttpJspBase. Java: 49) 
The at org. Apache. Jasper. Servlet. JspServletWrapper. GetServlet (JspServletWrapper. Java: 180) 
At org. Apache. Jasper. Servlet. JspServletWrapper. Service (369) JspServletWrapper. Java: 
The at org. Apache. Jasper. Servlet. JspServlet. ServiceJspFile (JspServlet. Java: 396) 
At org. Apache. Jasper. Servlet. JspServlet. Service (340) JspServlet. Java: 
The at javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 725) 
The at org. Apache. Catalina. Core. ApplicationFilterChain. InternalDoFilter (ApplicationFilterChain. Java: 291) 
The at org. Apache. Catalina. Core. ApplicationFilterChain. DoFilter (ApplicationFilterChain. Java: 206) 
The at org. Apache. Catalina. Core. StandardWrapperValve. Invoke (StandardWrapperValve. Java: 219) 
The at org. Apache. Catalina. Core. StandardContextValve. Invoke (StandardContextValve. Java: 106) 
The at org. Apache. Catalina. The authenticator. AuthenticatorBase. Invoke (AuthenticatorBase. Java: 506) 
The at org. Apache. Catalina. Core. StandardHostValve. Invoke (StandardHostValve. Java: 142) 
The at org. Apache. Catalina. Valves. ErrorReportValve. Invoke (ErrorReportValve. Java: 79) 
The at org. Apache. Catalina. Valves. AbstractAccessLogValve. Invoke (AbstractAccessLogValve. Java: 610) 
The at org. Apache. Catalina. Core. StandardEngineValve. Invoke (StandardEngineValve. Java: 88) 
At org. Apache. Catalina. Connector. CoyoteAdapter. Service (537) CoyoteAdapter. Java: 
The at org. Apache. Coyote. Http11. AbstractHttp11Processor. Process (AbstractHttp11Processor. Java: 1081) 
The at org. Apache. Coyote. AbstractProtocol $AbstractConnectionHandler. Process (AbstractProtocol. Java: 658) 
At org. Apache. Coyote. Http11. Http11NioProtocol $Http11ConnectionHandler. Process (222) Http11NioProtocol. Java: 
At org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun NioEndpoint. Java: (1566) 
At org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run NioEndpoint. Java: (1523) 
The at Java. Util. Concurrent. ThreadPoolExecutor. RunWorker (ThreadPoolExecutor. Java: 1142) 
The at Java. Util. Concurrent. ThreadPoolExecutor $Worker. The run (ThreadPoolExecutor. Java: 617) 
At org, apache tomcat. Util. Threads. TaskThread $WrappingRunnable. Run (61) TaskThread. Java: 
The at Java. Lang. Thread. The run (Thread. Java: 745)