java.lang.LinkageError: loader constraint violation: when resolving interface method "javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory;" 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/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspApplicationContext, have different Class objects for the type javax/el/ExpressionFactory used in the signature JBPM4在Tomca6.0上运行的时候报出上面的异常,是EL的问题,
项目中WEB-INF\lib中的三个jar包(juel.jar, juel-engine.jar, juel-impl.jar)和tomcat6下lib中jar包(el-api.jar)冲突
解决办法如下: 一:把Tomcat6换成Tomcat5.5就ok了。 二:将juel.jar, juel-engine.jar, juel-impl.jar这三个包复制到tomcat6下lib中,
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