我有一个使用 ICEfaces 制作并在 Tomcat 6 上运行的应用程序。当我尝试访问我选择用户的页面之一时,如果出现此错误。奇怪的是,在我收到错误消息后,我刷新了页面,它通常会转到我需要它去的地方。
有谁知道错误的实际含义,因为突出显示的代码行是关闭数据库连接、注释行(奇怪的大声笑)和其他一些不能有错误的语法内容。
exception
java.lang.RuntimeException: wrapped Exception: java.lang.NullPointerException
com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:156)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:56)
root cause
java.lang.NullPointerException
crm.CRM_SA_enter.reload_Fees(CRM_SA_enter.java:3591)
crm.CRM_SA_enter.gradeEval(CRM_SA_enter.java:3844)
crm.CRM_SA_enter.apply_dropDown(CRM_SA_enter.java:3265)
crm.CRM_SA_enter.load_function2(CRM_SA_enter.java:2314)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
org.apache.el.parser.AstValue.invoke(AstValue.java:191)
org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
com.sun.faces.application.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
javax.faces.component.UICommand.broadcast(UICommand.java:380)
com.icesoft.faces.component.panelseries.UISeries$RowEvent.broadcast(UISeries.java:617)
com.icesoft.faces.component.panelseries.UISeries.broadcast(UISeries.java:285)
com.icesoft.faces.component.panelseries.UISeries$RowEvent.broadcast(UISeries.java:617)
com.icesoft.faces.component.panelseries.UISeries.broadcast(UISeries.java:285)
com.icesoft.faces.component.paneltabset.PanelTabSet.broadcast(PanelTabSet.java:320)
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:475)
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:756)
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:82)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
com.icesoft.faces.webapp.http.core.JsfLifecycleExecutor.apply(JsfLifecycleExecutor.java:18)
com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.renderCycle(ReceiveSendUpdates.java:132)
com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.service(ReceiveSendUpdates.java:74)
com.icesoft.faces.webapp.http.core.RequestVerifier.service(RequestVerifier.java:31)
com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service(PathDispatcherServer.java:24)
com.icesoft.faces.webapp.http.servlet.BasicAdaptingServlet.service(BasicAdaptingServlet.java:16)
com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)
com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service(SessionDispatcher.java:53)
com.icesoft.faces.webapp.http.servlet.SessionVerifier.service(SessionVerifier.java:26)
com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)
com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:131)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:56)