netbeans莫明其妙的报错

最新推荐文章于 2018-12-28 20:15:27 发布

原创最新推荐文章于 2018-12-28 20:15:27 发布 · 1.1k 阅读

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#netbeans #application #access #debugging #thread #tomcat

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本文探讨了在NetBeans中使用Tomcat部署项目时出现的IllegalAccess异常问题，特别是当项目包含log4j.properties文件时更为显著。通过分析堆栈跟踪，揭示了问题根源在于Web应用程序实例已停止，而系统尝试加载标准类导致冲突。

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netbeans里莫名奇妙的报错：Illegal access: this web application instance has been stopped already. Could not load java.lang.Object。

经过多次试验后，发现，在项目里新增了一个log4j.properties文件，直接运行项目就报这个错。如果停了tomcat后再运行项目，就没有问题了，netbeans真是奇怪。

信息: Illegal access: this web application instance has been stopped already. Could not load java.lang.Object. The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1246)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1206)
        at com.sun.faces.application.ConverterPropertyEditorFactory$DisposableClassLoader.loadClass(ConverterPropertyEditorFactory.java:447)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
        at java.lang.Class.getDeclaredConstructors0(Native Method)
        at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
        at java.lang.Class.getConstructor0(Class.java:2699)
        at java.lang.Class.newInstance0(Class.java:326)
        at java.lang.Class.newInstance(Class.java:308)
        at java.beans.PropertyEditorManager.findEditor(PropertyEditorManager.java:79)
        at com.sun.faces.application.ApplicationImpl.addPropertyEditorIfNecessary(ApplicationImpl.java:690)
        at com.sun.faces.application.ApplicationImpl.addConverter(ApplicationImpl.java:660)
        at com.sun.faces.config.ConfigureListener.configure(ConfigureListener.java:727)
        at com.sun.faces.config.ConfigureListener.configure(ConfigureListener.java:489)
        at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:381)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3843)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4350)
        at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3099)
        at org.apache.catalina.manager.ManagerServlet.reload(ManagerServlet.java:913)
        at org.apache.catalina.manager.ManagerServlet.doGet(ManagerServlet.java:359)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:196)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:525)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)