java.lang.NoClassDefFoundError：org.apache.jasper.el.E​​LContextImpl（初始化失败）

Question

我们已经升级到Websphere 9以及Camel 2.17，Java8和Spring4。

在包装内，我们有以下罐子

camel-jms-2.17.0.jar, camel-juel-2.17.0.jar, camel-spring-2.17.0.jar

在was plugin文件夹中，我们有以下jar，包含ElContextImpl。

 javax.j2ee.el.jar,  com.ibm.ws.webcontainer.jar

在点击网址时获得以下异常。不知道是什么因为它出现错误而导致错误，无论是版本不匹配，冲突还是类路径问题

com.ibm.ws.webcontainer.webapp.WebApp logServletError SRVE0293E: [Servlet Error]-[WebExtensionProcessor]: java.lang.NoClassDefFoundError: org.apache.jasper.el.ELContextImpl (initialization failure)
        at java.lang.J9VMInternals.initializationAlreadyFailed(J9VMInternals.java:91)
        at com.ibm.ws.jsp.translator.visitor.validator.ELValidator.validateElFunction(ELValidator.java:499)
        at com.ibm.ws.jsp.translator.visitor.validator.ELValidator.validateELExpression(ELValidator.java:123)
        at com.ibm.ws.jsp.translator.visitor.validator.ELValidator.validateELExpression(ELValidator.java:150)
        at com.ibm.ws.jsp.translator.visitor.validator.ValidateVisitor.validateCustomTagAttribute(ValidateVisitor.java:1757)
        at com.ibm.ws.jsp.translator.visitor.validator.ValidateVisitor.validateCustomTagAttributeValues(ValidateVisitor.java:1405)
        at com.ibm.ws.jsp.translator.visitor.validator.ValidateVisitor.visitCustomTagStart(ValidateVisitor.java:294)
        at com.ibm.ws.jsp.translator.visitor.JspVisitor.processJspElement(JspVisitor.java:366)
        at com.ibm.ws.jsp.translator.visitor.JspVisitor.processChildren(JspVisitor.java:419)
        at com.ibm.ws.jsp.translator.visitor.JspVisitor.processJspElement(JspVisitor.java:369)

Caused by: java.lang.NullPointerException
        at javax.el.CompositeELResolver.add(CompositeELResolver.java:49)
        at org.apache.jasper.el.ELContextImpl.<clinit>(ELContextImpl.java:85)
        at com.ibm.ws.jsp.translator.visitor.validator.ELValidator.validateElFunction(ELValidator.java:499)
        at com.ibm.ws.jsp.translator.visitor.validator.ELValidator.validateELExpression(ELValidator.java:123)
        at com.ibm.ws.jsp.translator.visitor.validator.ELValidator.validateELExpression(ELValidator.java:150)
        at com.ibm.ws.jsp.translator.visitor.validator.ValidateVisitor.validateCustomTagAttribute(ValidateVisitor.java:1757)
        at com.ibm.ws.jsp.translator.visitor.validator.ValidateVisitor.validateCustomTagAttributeValues(ValidateVisitor.java:1405)
        at com.ibm.ws.jsp.translator.visitor.validator.ValidateVisitor.visitCustomTagStart(ValidateVisitor.java:294)
        at com.ibm.ws.jsp.translator.visitor.JspVisitor.processJspElement(JspVisitor.java:366)
        at com.ibm.ws.jsp.translator.visitor.JspVisitor.processChildren(JspVisitor.java:419)
        at com.ibm.ws.jsp.translator.visitor.JspVisitor.processJspElement(JspVisitor.java:369)
        at com.ibm.ws.jsp.translator.visitor.JspVisitor.processChildren(JspVisitor.java:419)

Answer 1

这个问题与camel引用的juel jar有关。这个版本的jar用于JSP 2.1;因此，它不支持 EL 3.0是用于WAS 9.0.0.2的那个。 所以我已经删除了这个jar，因为没有更高版本的jar可用，并用juel-impl-2.2.7.jar替换了它。

现在正在运作。