20160421HTTP Status 500-java.lang.linkageerror Loader constraint violation when resolving method O

HTTP Status 500-java.lang.linkageerror Loader constraint violation when resolving method Org.apache.jasper.runtime.Inst Ancemanagerfactory.getinstancemanager

Program error: 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" defining class, Org/apache/jasper/runtime/instanc Emanagerfactory, have different Class objects for the ' type Org/apache/tomcat/instancemanager used in the signature:

We read the wrong log carefully, and there is a saying:

This clearly indicates that we are a jar pack conflict problem, and we went to the Maven config file pom.xml to specify the scope of the jar package for Tomcat.