Question

我有一个抽象类Problem。它的包是com.namespace.problem。我的tomcat应用程序在每个页面上调用Problem.staticMethod()。我在每个页面上收到500错误NoClassDefFoundError。在调试器中，我可以访问Problem中的静态字段。我可以成功地在其实例方法上放置断点。它无法在静态方法上放置断点，并且我调用的任何静态方法都会导致NoClassDefFoundError。

Tomcat在Docker容器中运行。当我在本地计算机上运行docker容器时，没有问题。当我在我的AWS实例上运行它时，每个页面都有一个NoClassDefFoundError。

我知道我应该寻找ClassNotFoundException或ExceptionInInitializerError，但一无所获。

我无法初始化问题（因为它是抽象的）。我在调试器中看不到Problem.class，它也会导致错误。我无法实例化任何扩展Problem的类，我得到同样的错误。

可能导致这种情况的原因是什么？ docker的观点是独立于平台，所以我不知道为什么会在AWS上发生这种情况，而不是我的计算机，我正在部署相同的WAR。

Stacktrace:
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:574)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:461)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
    org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
    org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
    org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394)
    org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213)
    org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171)
    org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
    org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
    org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394)
root cause

javax.servlet.ServletException: java.lang.NoClassDefFoundError: Could not initialize class com.namespace.problem.Problem
    org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:909)
    org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:838)
    org.apache.jsp.view.system.index_jsp._jspService(index_jsp.java:381)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
    org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
    org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
    org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394)
    org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213)
    org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171)
    org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
    org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
    org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394)
root cause

java.lang.NoClassDefFoundError: Could not initialize class com.namespace.problem.Problem
    com.namespace.system.Application.setInitialState(Application.java:327)
    com.namespace.system.Application.setInitialState(Application.java:296)
    com.namespace.system.Application.setInitialState(Application.java:292)
    com.namespace.mvc.controller.Controller.<init>(Controller.java:80)
    com.namespace.mvc.controller.SystemController.<init>(SystemController.java:20)
    org.apache.jsp.view.system.index_jsp._jspService(index_jsp.java:122)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
    org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
    org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
    org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394)
    org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:213)
    org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171)
    org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
    org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
    org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:394)

Answer 1

显然，有一个XML配置文件，其路径由env var定义。我本地计算机上的var是正确的，在AWS上它是错误的，因为我的repo中的其他人重命名了该文件。显然，出于某种原因，不是关于文件不存在的合理错误，而是从一个甚至不使用配置文件的类中获得NoClassDefFoundError。

Tomcat中的抽象类的NoClassDefFoundError

1 个答案: