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Posted to user@struts.apache.org by Jake Vang <va...@googlemail.com> on 2011/04/23 05:22:23 UTC
streaming plain text, json, xml back to the user, IllegalStateException
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
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Re: streaming plain text, json, xml back to the user, IllegalStateException
Posted by Paweł Wielgus <po...@gmail.com>.
Hi Jake,
who said it has to be in xml?
@Result(name="success", type="stream", params={"inputName", "image",
"contentType", "contentType", "contentDisposition", "inline"})
but please double check what kind of default params are in current version,
for example if You will have:
public InputStream getInputStream() {...}
in your action there is no need to specify it in params section in
@Result annotation.
Best greetings,
Paweł Wielgus.
2011/4/27 Jake Vang <va...@googlemail.com>:
> Pawel, you know of anything like this but for the convention plugin? I
> don't use XML anymore. In fact, I've gotten away a lot with almost a
> purely annotation based approach. In fact, my struts.xml is 4-5 lines
> only.
>
> 2011/4/26 Paweł Wielgus <po...@gmail.com>:
>> Hi Jake,
>> maybe this aproach would help You:
>> http://struts.apache.org/2.2.1.1/docs/stream-result.html
>>
>> Best greetings,
>> Paweł Wielgus.
>>
>>
>> 2011/4/24 Jake Vang <va...@googlemail.com>:
>>> Dave,
>>>
>>> is there anyway to set it up so that the session can be created and
>>> not destroyed when i return null?
>>>
>>> i am finding out that when i stream back an image (CAPTCHA) this time
>>> (not json/xml/text as before), i need to store the answer in the
>>> session. even if i do session.setAttribute("captcha-answer",answer),
>>> when another action is called, there is nothing in the session i.e.
>>> session.getAttribute("captcha-answer") is null.
>>>
>>> the only way i can get a session object properly is if i go to an
>>> action where a JSP page is rendered.
>>>
>>> Thanks,
>>>
>>> On Sat, Apr 23, 2011 at 12:11 AM, Dave Newton <da...@gmail.com> 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" <va...@googlemail.com> 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 <va...@googlemail.com>
>>>> 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: user-unsubscribe@struts.apache.org
>>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>>
>>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>>> For additional commands, e-mail: user-help@struts.apache.org
>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>>
>
> ---------------------------------------------------------------------
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>
>
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Re: streaming plain text, json, xml back to the user, IllegalStateException
Posted by Jake Vang <va...@googlemail.com>.
Pawel, you know of anything like this but for the convention plugin? I
don't use XML anymore. In fact, I've gotten away a lot with almost a
purely annotation based approach. In fact, my struts.xml is 4-5 lines
only.
2011/4/26 Paweł Wielgus <po...@gmail.com>:
> Hi Jake,
> maybe this aproach would help You:
> http://struts.apache.org/2.2.1.1/docs/stream-result.html
>
> Best greetings,
> Paweł Wielgus.
>
>
> 2011/4/24 Jake Vang <va...@googlemail.com>:
>> Dave,
>>
>> is there anyway to set it up so that the session can be created and
>> not destroyed when i return null?
>>
>> i am finding out that when i stream back an image (CAPTCHA) this time
>> (not json/xml/text as before), i need to store the answer in the
>> session. even if i do session.setAttribute("captcha-answer",answer),
>> when another action is called, there is nothing in the session i.e.
>> session.getAttribute("captcha-answer") is null.
>>
>> the only way i can get a session object properly is if i go to an
>> action where a JSP page is rendered.
>>
>> Thanks,
>>
>> On Sat, Apr 23, 2011 at 12:11 AM, Dave Newton <da...@gmail.com> 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" <va...@googlemail.com> 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 <va...@googlemail.com>
>>> 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: user-unsubscribe@struts.apache.org
>>>> For additional commands, e-mail: user-help@struts.apache.org
>>>>
>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>
---------------------------------------------------------------------
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For additional commands, e-mail: user-help@struts.apache.org
Re: streaming plain text, json, xml back to the user, IllegalStateException
Posted by Paweł Wielgus <po...@gmail.com>.
Hi Jake,
maybe this aproach would help You:
http://struts.apache.org/2.2.1.1/docs/stream-result.html
Best greetings,
Paweł Wielgus.
2011/4/24 Jake Vang <va...@googlemail.com>:
> Dave,
>
> is there anyway to set it up so that the session can be created and
> not destroyed when i return null?
>
> i am finding out that when i stream back an image (CAPTCHA) this time
> (not json/xml/text as before), i need to store the answer in the
> session. even if i do session.setAttribute("captcha-answer",answer),
> when another action is called, there is nothing in the session i.e.
> session.getAttribute("captcha-answer") is null.
>
> the only way i can get a session object properly is if i go to an
> action where a JSP page is rendered.
>
> Thanks,
>
> On Sat, Apr 23, 2011 at 12:11 AM, Dave Newton <da...@gmail.com> 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" <va...@googlemail.com> 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 <va...@googlemail.com>
>> 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: user-unsubscribe@struts.apache.org
>>> For additional commands, e-mail: user-help@struts.apache.org
>>>
>>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>
---------------------------------------------------------------------
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Re: streaming plain text, json, xml back to the user, IllegalStateException
Posted by Jake Vang <va...@googlemail.com>.
Dave,
is there anyway to set it up so that the session can be created and
not destroyed when i return null?
i am finding out that when i stream back an image (CAPTCHA) this time
(not json/xml/text as before), i need to store the answer in the
session. even if i do session.setAttribute("captcha-answer",answer),
when another action is called, there is nothing in the session i.e.
session.getAttribute("captcha-answer") is null.
the only way i can get a session object properly is if i go to an
action where a JSP page is rendered.
Thanks,
On Sat, Apr 23, 2011 at 12:11 AM, Dave Newton <da...@gmail.com> 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" <va...@googlemail.com> 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 <va...@googlemail.com>
> 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: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>
---------------------------------------------------------------------
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Re: streaming plain text, json, xml back to the user, IllegalStateException
Posted by Jake Vang <va...@googlemail.com>.
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 <da...@gmail.com> 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" <va...@googlemail.com> 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 <va...@googlemail.com>
> 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: user-unsubscribe@struts.apache.org
>> For additional commands, e-mail: user-help@struts.apache.org
>>
>
---------------------------------------------------------------------
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Re: streaming plain text, json, xml back to the user, IllegalStateException
Posted by Dave Newton <da...@gmail.com>.
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" <va...@googlemail.com> 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 <va...@googlemail.com>
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: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
Re: streaming plain text, json, xml back to the user, IllegalStateException
Posted by Jake Vang <va...@googlemail.com>.
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 <va...@googlemail.com> 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
>
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