Issue 4: java.lang.NumberFormatException: For input string: "" 异常
Project Member Reported by wangjian...@gmail.com, Oct 17, 2010
2010-10-18 13:44:57 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jforum threw exception
java.lang.NumberFormatException: For input string: ""
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
	at java.lang.Integer.parseInt(Integer.java:468)
	at java.lang.Integer.<init>(Integer.java:620)
	at sun.reflect.GeneratedConstructorAccessor96.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at org.apache.commons.configuration.PropertyConverter.toNumber(PropertyConverter.java:308)
	at org.apache.commons.configuration.PropertyConverter.toInteger(PropertyConverter.java:157)
	at org.apache.commons.configuration.AbstractConfiguration.getInteger(AbstractConfiguration.java:722)
	at org.apache.commons.configuration.AbstractConfiguration.getInt(AbstractConfiguration.java:681)
	at net.jforum.actions.ForumActions.list(ForumActions.java:115)
	at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.vraptor.component.DefaultLogicMethod.execute(DefaultLogicMethod.java:61)
	at org.vraptor.interceptor.ExecuteLogicInterceptor.intercept(ExecuteLogicInterceptor.java:32)
	at org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:73)
	at org.vraptor.interceptor.SettingAndValidationInterceptor.intercept(SettingAndValidationInterceptor.java:130)
	at org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:73)
	at org.vraptor.interceptor.InjectionInterceptor.intercept(InjectionInterceptor.java:41)
	at org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:73)
	at org.vraptor.interceptor.ComponentLookupInterceptor.intercept(ComponentLookupInterceptor.java:57)
	at org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:73)
	at net.jforum.actions.interceptors.SecurityInterceptor.intercept(SecurityInterceptor.java:39)
	at org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:73)
	at org.vraptor.interceptor.FlashScopeInterceptor.intercept(FlashScopeInterceptor.java:22)
	at org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:73)
	at org.vraptor.interceptor.RegisterAttributesInteceptor.intercept(RegisterAttributesInteceptor.java:47)
	at org.vraptor.core.InterceptorsLogicFlow.execute(InterceptorsLogicFlow.java:73)
	at org.vraptor.core.VRaptorExecution.execute(VRaptorExecution.java:91)
	at org.vraptor.core.DefaultController.execute(DefaultController.java:46)
	at org.vraptor.VRaptorServlet.service(VRaptorServlet.java:74)
	at net.jforum.JForumServlet.service(JForumServlet.java:86)
	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 net.jforum.core.support.hibernate.OpenSessionInViewFilter.doFilter(OpenSessionInViewFilter.java:46)
	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:230)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)