Jbpm4.3和Tomcat6.0兼容问题
最近在研究，想自己随便搞个请假流程，环境是Jbpm4.3 Tomcat6.0，出师不利，刚启动Tomcat就报如下错误：
javax.servlet.ServletException: 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
百度之得原因：
原来Jbpm4.3 下的juel.jar, juel-engine.jar, juel-impl.jar包和Tomcat6.0中的el-api.jar包冲突了。
解决方法如下:
1.将juel.jar, juel-engine.jar, juel-impl.jar拷贝到Tomcat6.0 的lib目录下
2.删除Tomat6.0中lib下的el-api.jar包
3.要把项目中的juel.jar, juel-engine.jar, juel-impl.jar包去掉
OK~~再测试成功~~
2010年11月16日 05:28
版主您好，我想請問關於第三點您所寫的"項目" 是位於何處?
謝謝您的回覆
2010年11月18日 23:38
就是在你发布到tomcat后的【项目\WEB-INF\lib】目录下~~~
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