Struts2: java. lang. NoSuchFieldException: resourceEntries at java. lang. Class. getDeclaredField (Class. java: 1901), resourceentries

Struts2: java. lang. NoSuchFieldException: resourceEntries at java. lang. Class. getDeclaredField (Class. java: 1901), resourceentries

During the Struts2 test case today, the program can jump normally, but an error is reported on the Console, as shown below:

  1 java.lang.NoSuchFieldException: resourceEntries  2     at java.lang.Class.getDeclaredField(Class.java:1901)  3     at com.opensymphony.xwork2.util.LocalizedTextUtil.clearMap(LocalizedTextUtil.java:877)  4     at com.opensymphony.xwork2.util.LocalizedTextUtil.clearTomcatCache(LocalizedTextUtil.java:857)  5     at com.opensymphony.xwork2.util.LocalizedTextUtil.reloadBundles(LocalizedTextUtil.java:841)  6     at com.opensymphony.xwork2.util.LocalizedTextUtil.getMessage(LocalizedTextUtil.java:723)  7     at com.opensymphony.xwork2.util.LocalizedTextUtil.findMessage(LocalizedTextUtil.java:781)  8     at com.opensymphony.xwork2.util.LocalizedTextUtil.findText(LocalizedTextUtil.java:447)  9     at com.opensymphony.xwork2.util.LocalizedTextUtil.findText(LocalizedTextUtil.java:374) 10     at com.opensymphony.xwork2.TextProviderSupport.getText(TextProviderSupport.java:202) 11     at com.opensymphony.xwork2.TextProviderSupport.getText(TextProviderSupport.java:117) 12     at com.opensymphony.xwork2.ActionSupport.getText(ActionSupport.java:100) 13     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 14     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 15     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 16     at java.lang.reflect.Method.invoke(Method.java:601) 17     at ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:871) 18     at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1273) 19     at ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68) 20     at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:117) 21     at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:101) 22     at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1349) 23     at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1325) 24     at com.opensymphony.xwork2.ognl.accessor.CompoundRootAccessor.callMethod(CompoundRootAccessor.java:232) 25     at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1349) 26     at ognl.ASTMethod.getValueBody(ASTMethod.java:90) 27     at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) 28     at ognl.SimpleNode.getValue(SimpleNode.java:258) 29     at ognl.Ognl.getValue(Ognl.java:494) 30     at com.opensymphony.xwork2.ognl.OgnlUtil.getValue(OgnlUtil.java:217) 31     at com.opensymphony.xwork2.ognl.OgnlValueStack.getValue(OgnlValueStack.java:342) 32     at com.opensymphony.xwork2.ognl.OgnlValueStack.tryFindValue(OgnlValueStack.java:331) 33     at com.opensymphony.xwork2.ognl.OgnlValueStack.tryFindValueWhenExpressionIsNotNull(OgnlValueStack.java:307) 34     at com.opensymphony.xwork2.ognl.OgnlValueStack.findValue(OgnlValueStack.java:293) 35     at org.apache.struts2.components.Property.start(Property.java:162) 36     at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:53) 37     at org.apache.jsp.welcome_jsp._jspx_meth_s_005fproperty_005f0(welcome_jsp.java:227) 38     at org.apache.jsp.welcome_jsp._jspService(welcome_jsp.java:129) 39     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 40     at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 41     at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438) 42     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396) 43     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340) 44     at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 45     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) 46     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 47     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 48     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) 49     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 50     at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:721) 51     at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:466) 52     at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:391) 53     at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:318) 54     at org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:159) 55     at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186) 56     at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:373) 57     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:277) 58     at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176) 59     at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) 60     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 61     at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263) 62     at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68) 63     at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) 64     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 65     at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:133) 66     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 67     at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207) 68     at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) 69     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 70     at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207) 71     at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) 72     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 73     at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190) 74     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 75     at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) 76     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 77     at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) 78     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 79     at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243) 80     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 81     at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100) 82     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 83     at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141) 84     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 85     at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267) 86     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 87     at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:142) 88     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 89     at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:166) 90     at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98) 91     at com.opensymphony.xwork2.DefaultActionInvocation.invok 92 e(DefaultActionInvocation.java:248) 93     at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176) 94     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 95     at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) 96     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 97     at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190) 98     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248) 99     at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)100     at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)101     at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)102     at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:485)103     at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)104     at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)105     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)106     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)107     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)108     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)109     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)110     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)111     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)112     at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617)113     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)114     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)115     at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)116     at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)117     at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2503)118     at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2492)119     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)120     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)121     at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)122     at java.lang.Thread.run(Thread.java:722)

At the beginning, I was puzzled because resourceEntries was not used in my form. So I checked the struts2 source code and found resourceEntries IN THE struts2 source code.

 1 private static void clearTomcatCache() 2   { 3     ClassLoader loader = getCurrentThreadContextClassLoader(); 4  5     Class cl = loader.getClass(); 6     try 7     { 8       if ("org.apache.catalina.loader.WebappClassLoader".equals(cl.getName())) { 9         clearMap(cl, loader, "resourceEntries");10       }11       else if (LOG.isDebugEnabled())12         LOG.debug("class loader " + cl.getName() + " is not tomcat loader.", new String[0]);13     }14     catch (NoSuchFieldException nsfe)15     {16       if ("org.apache.catalina.loader.WebappClassLoaderBase".equals(cl.getSuperclass().getName())) {17         if (LOG.isDebugEnabled())18           LOG.debug("Base class #0 doesn't contain '#1' field, trying with parent!", nsfe, new String[] { cl.getName(), "resourceEntries" });19         try20         {21           clearMap(cl.getSuperclass(), loader, "resourceEntries");22         } catch (Exception e) {23           if (LOG.isWarnEnabled())24             LOG.warn("Couldn't clear tomcat cache using #0", e, new String[] { cl.getSuperclass().getName() });25         }26       }27     }28     catch (Exception e) {29       if (LOG.isWarnEnabled())30         LOG.warn("Couldn't clear tomcat cache", e, new String[] { cl.getName() });31     }32   }

You can see org. apache. catalina. loader. webappClassLoaderBase seems to be a problem in tomcat, so I checked the information on the Internet and found that the class loader webappclsaaLoader in tomcat8.0 has no resourceEntries attribute. So I checked resourceEntries in tomcat7.0. It seems that this is a problem with the tomcat version. If Tomcat 8 is required, you must modify the struts2 bug and re-compile it. This is also a benefit of open source.