无法转换为org.apache.jasper.r. [英] org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.runtime.ELContextImpl
问题描述
我有一个用java实现的Web服务项目，它还包含jsp页面。我在我的机器上将它部署在jetty 8.1.5上并且它正常工作。但是，当我在带有jetty 8.1.3的Windows Server 2003上进行部署时，它会出现以下异常：
I have a web service project implemented in java and it also contains jsp pages. I deploy it on jetty 8.1.5 on my machine and it works normally. But when I deploy on a windows server 2003 with jetty 8.1.3 it gives this exception:
org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.runtime.ELContextImpl
这是完整的跟踪：
java.lang.ClassCastException: org.apache.jasper.el.ELContextImpl cannot be cast to org.apache.jasper.runtime.ELContextImpl
at org.apache.jasper.runtime.PageContextImpl.evaluateExpression(PageContextImpl.java:1002)
at org.apache.jsp.home.index_jsp._jspService(org.apache.jsp.home.index_jsp:52)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:403)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:492)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:378)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:598)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:486)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:542)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:413)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:999)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:271)
at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:98)
at org.eclipse.jetty.servlet.DefaultServlet.doGet(DefaultServlet.java:557)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:735)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:598)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:486)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:499)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:413)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:999)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111)
at org.eclipse.jetty.server.Server.handle(Server.java:350)
at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:454)
at org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:890)
at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:944)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:630)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:230)
at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538)
at java.lang.Thread.run(Unknown Source)
知道这个例外是什么以及如何解决这个问题吗？
Any idea what is this exception and how to fix it?
推荐答案
如果您的网络应用程序发货，可能会发生这种情况与servletcontainer特定的JAR文件，如 jasper.jar ， jetty.jar servlet.jar某些unclea的等原因。这反过来与目标servletcontainer上的不同版本化JAR文件冲突。 / WEB-INF / lib 中的
That can happen if your webapp ships with servletcontainer-specific JAR files such as jasper.jar, jetty.jar servlet.jar, etc in the /WEB-INF/lib for some unclear reason. This is in turn conflicting with with a different versioned JAR file on the target servletcontainer.
从webapp的 / WEB中删除该servletcontainer特定的JAR文件-INF / lib中。它不属于那里。它应该已经由servletcontainer本身提供。
Remove that servletcontainer-specific JAR file from your webapp's /WEB-INF/lib. It doesn't belong there. It's supposed to be already supplied by the servletcontainer itself.
- 我该怎么做在我的Eclipse项目中导入javax.servlet API？（这并不能完全解决您的具体问题，但这至少在技术上是同一个核心问题，可以让您更好地理解这个常见的启动程序的错误）
- How do I import the javax.servlet API in my Eclipse project? (this doesn't exactly answer your concrete problem, but this is at least technically the same core problem which should give you a better understanding of this common starter's mistake)
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