java.lang.NullPointerException at jp.co.ip_dream.japacon.site.action.SiteCoverphotoLinkDownloadAction.outputFileId(SiteCoverphotoLinkDownloadAction.java:363) at jp.co.ip_dream.japacon.site.action.SiteCoverphotoLinkDownloadAction.output(SiteCoverphotoLinkDownloadAction.java:347) at sun.reflect.GeneratedMethodAccessor158.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at ognl.OgnlRuntime.invokeMethodInsideSandbox(OgnlRuntime.java:1245) at ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:1230) at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1958) at ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68) at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:98) at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:90) at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:2034) at ognl.ASTMethod.getValueBody(ASTMethod.java:97) at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) at ognl.SimpleNode.getValue(SimpleNode.java:258) at ognl.Ognl.getValue(Ognl.java:586) at com.opensymphony.xwork2.ognl.OgnlUtil.ognlGet(OgnlUtil.java:596) at com.opensymphony.xwork2.ognl.OgnlUtil.callMethod(OgnlUtil.java:572) at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:438) at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:311) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:263) at com.opensymphony.xwork2.interceptor.annotations.AnnotationWorkflowInterceptor.intercept(AnnotationWorkflowInterceptor.java:138) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:260) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:185) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:102) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263) at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:49) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:102) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.FetchMetadataInterceptor.intercept(FetchMetadataInterceptor.java:78) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.CoopInterceptor.intercept(CoopInterceptor.java:57) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.CoepInterceptor.intercept(CoepInterceptor.java:55) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.doIntercept(ConversionErrorInterceptor.java:147) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:102) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.parameter.ParametersInterceptor.doIntercept(ParametersInterceptor.java:204) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:102) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.parameter.ParametersInterceptor.doIntercept(ParametersInterceptor.java:204) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:102) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:206) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:67) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:133) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:89) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.ActionFileUploadInterceptor.intercept(ActionFileUploadInterceptor.java:141) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:200) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:104) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:146) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:169) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:176) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:102) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.csp.CspInterceptor.intercept(CspInterceptor.java:66) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.httpmethod.HttpMethodInterceptor.intercept(HttpMethodInterceptor.java:99) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:154) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:233) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:199) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:104) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at jp.co.ip_dream.japacon.common.interceptor.LoginCheckInterceptor.intercept(LoginCheckInterceptor.java:64) at com.opensymphony.xwork2.interceptor.AbstractInterceptor.intercept(AbstractInterceptor.java:36) at com.opensymphony.xwork2.DefaultActionInvocation.executeConditional(DefaultActionInvocation.java:303) at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:257) at org.apache.struts2.factory.StrutsActionProxy.execute(StrutsActionProxy.java:48) at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:739) at org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:79) at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.handleRequest(StrutsPrepareAndExecuteFilter.java:163) at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.tryHandleRequest(StrutsPrepareAndExecuteFilter.java:146) at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:134) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156) at jp.co.ip_dream.common.filter.ModifyEncodingForStruts2GarbleFilter.doFilter(ModifyEncodingForStruts2GarbleFilter.java:83) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156) at jp.co.ip_dream.common.filter.OpenSessionInViewFilter.doFilter(OpenSessionInViewFilter.java:76) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:181) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:156) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:130) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:682) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:533) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:932) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1695) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:750)