java.lang.LinkageError: loader constraint violation: when resolving interface... 异常解决
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严重: Servlet.service() for servlet jsp threw exception
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
原因:
jbpm4 在tomcat6 下面ssh2 这个错误!
原因是项目中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
解决方法:
方法一:换成tomcat5.5 一点问题也没有了
方法二:将juel.jar, juel-engine.jar, juel-impl.jar这三个包复制到tomcat6下lib中,并删除原来的el-api.jar,
切记要把WEB-INF\lib中的juel.jar, juel-engine.jar, juel-impl.jar删除。不然还是要冲突。
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