HTTP Status 500 - 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 java/net/URLClassLoader) 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

type Exception report

message 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 java/net/URLClassLoader) 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

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: 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 java/net/URLClassLoader) 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

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:349)

javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)

org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

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 class loader (instance of org/apache/jasper/servlet/JasperLoader) of the current class, org/apache/jsp/index_jsp, and the class loader (instance of java/net/URLClassLoader) 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

org.apache.jsp.index_jsp._jspInit(index_jsp.java:53)

org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:49)

org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:179)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)

javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)

org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

note The full stack trace of the root cause is available in the Apache Tomcat/8.0.23 logs.

Apache Tomcat/8.0.23

参考：

把tomcat8换为tomcat7后

报另一个错误：JspSourceImports找不到

HTTP Status 500 - java.lang.NoClassDefFoundError: org/apache/jasper/runtime/JspSourceImports

type Exception report

message java.lang.NoClassDefFoundError: org/apache/jasper/runtime/JspSourceImports

description The server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/apache/jasper/runtime/JspSourceImports

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:348)

javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)

org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

root cause

java.lang.NoClassDefFoundError: org/apache/jasper/runtime/JspSourceImports

java.lang.ClassLoader.defineClass1(Native Method)

java.lang.ClassLoader.defineClass(ClassLoader.java:760)

java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)

java.net.URLClassLoader.defineClass(URLClassLoader.java:467)

java.net.URLClassLoader.access100(URLClassLoader.java:73)java.net.URLClassLoader1.run(URLClassLoader.java:368)

java.net.URLClassLoader$1.run(URLClassLoader.java:362)

java.security.AccessController.doPrivileged(Native Method)

java.net.URLClassLoader.findClass(URLClassLoader.java:361)

org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132)

org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:63)

org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:172)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:376)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)

javax.servlet.http.HttpServlet.service(HttpServlet.java:731)

org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:85)

org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

root cause

java.lang.ClassNotFoundException: org.apache.jasper.runtime.JspSourceImports

org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)

org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)

org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:126)