Dave, Yes, that works too. That is perhaps even more elegant. What I had was a sort of a kludge. Per your suggestion, if I don't return SUCCESS and return null, then that message doesn't appear. Another implication of your solution is then I don't need to have an actionAlias-success.jsp.
Thank you so much. On Sat, Apr 23, 2011 at 12:11 AM, Dave Newton <[email protected]> wrote: > My first guess would be to return null so you're not rendering a jsp after > the output stream is closed. > > Dave > On Apr 22, 2011 11:49 PM, "Jake Vang" <[email protected]> wrote: >> what i did to get rid of this message was to add the following line >> before i do anything. >> >> getSerlvetRequest().getSession(); >> >> that means anytime this method is called i make the two method calls >> above. i'm not sure what the impact on performance will be. but for >> now, it gets rid of the message. if anyone has a better suggestion, >> please let me know. >> >> On Fri, Apr 22, 2011 at 11:22 PM, Jake Vang <[email protected]> > wrote: >>> i am using struts 2 with the convention plugin. i have a bunch of >>> actions that streams back plain text, json or xml. however, when a >>> user goes to a certain URL, i keep seeing an IllegalStateException : >>> Cannot create a session after the response has been committed. >>> >>> why is this happening? >>> >>> my action class and the method is defined like the following: >>> >>> public class MyAction extends ActionSupport implements >>> ServletRequestAware, ServletResponseAware { >>> @Action(value="/myService") >>> public String execute() { >>> HttpServletResponse response = getServletResponse(); >>> ServletOutputStream os = response.getOutputStream(); >>> response.reset(); >>> response.setContentType("text/plain"); >>> os.write("some text".getBytes()); >>> os.close(); >>> return SUCCESS; >>> } >>> } >>> >>> there is a file corresponding to this action in >>> /web/WEB-INF/content/myService-success.jsp. this file is blank. >>> >>> one thing i noticed is that if i go to a URL that does not stream back >>> plain text, json, or xml (for example, one that forwards to a JSP >>> page), and then go back to /myService, the problem goes away. i >>> "think" that when i go to a regular URL (one that forwards to a JSP >>> page), the session object is created, and so whenever i go back to >>> /myService, the problem goes away. >>> >>> my webapp will primarily be a backend service, and so there won't be >>> any JSP front-ends. but i'd like to use struts2 + convention plugin to >>> handle all the data posts. any pointer is appreciated. the full >>> stacktrace is below. any help is appreciated. >>> >>> java.lang.IllegalStateException: Cannot create a session after the >>> response has been committed >>> at > org.apache.catalina.connector.Request.doGetSession(Request.java:2381) >>> at > org.apache.catalina.connector.Request.getSession(Request.java:2098) >>> at > org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:833) >>> at > javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:216) >>> at > org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:544) >>> at > org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:493) >>> at > javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:224) >>> at > org.apache.jasper.runtime.PageContextImpl._initialize(PageContextImpl.java:146) >>> at > org.apache.jasper.runtime.PageContextImpl.initialize(PageContextImpl.java:124) >>> at > org.apache.jasper.runtime.JspFactoryImpl.internalGetPageContext(JspFactoryImpl.java:107) >>> at > org.apache.jasper.runtime.JspFactoryImpl.getPageContext(JspFactoryImpl.java:63) >>> at > org.apache.jsp.WEB_002dINF.content.locationService_002dsuccess_jsp._jspService(locationService_002dsuccess_js >>> p.java:44) >>> at > org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) >>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) >>> at > org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377) >>> at > org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313) >>> at > org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260) >>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) >>> at > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) >>> at > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) >>> at > org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646) >>> at > org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551) >>> at > org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488) >>> at > org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(ServletDispatcherResult.java:156) >>> at > org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:362) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:266) >>> at > com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:16 >>> 5) >>> at > com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252) >>> at > org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInt >>> erceptor.java:68) >>> at > com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122) >>> >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) >>> at > com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) >>> at > com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:17 >>> 9) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java: >>> 130) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138) >>> at > com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:17 >>> 6) >>> at > com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) >>> at > org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) >>> at > org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488) >>> at > org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) >>> at > org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter. >>> java:91) >>> 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:191) >>> at > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) >>> 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:298) >>> at > org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859) >>> at > org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579) >>> at > org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555) >>> at java.lang.Thread.run(Thread.java:662) >>> FATAL > org.apache.jasper.runtime.JspFactoryImpl.internalGetPageContext(JspFactoryImpl.java:112) >>> - Exception initializing >>> page context >>> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
