[SOLVED] Struts 2: Cannot create a session after the response has been committed

[aleks march]

I need your help. The problem is:

1. tomcat destroy the session after time in is over
2. user click on link within app
3. we get error:

java.lang.IllegalStateException at org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:407)
at org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:725)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:485)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:113)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
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:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:879)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:617)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1760)
at java.lang.Thread.run(Unknown Source)

Like it works internally: Error can be reproduced only for some actions. for example this url reproduce issue

localhost:8080/myapp/editPromotion?promoId=TestBes

and this one is not

localhost:8080/myapp/searchCustomerHome

the interceptor works the same for these urls

public String intercept(ActionInvocation invocation) throws Exception {
    if (!isLoginAction(invocation)) {
        Map<String, Object> sessionMap = ActionContext.getContext().getSession();

        if (sessionMap.get(LoginAction.USER_NAME) == null) {
            return "notAuthenticated";
        }
    }

    return invocation.invoke();
}

and return "notAuthenticated".

Also I have in struts.xml this piece of code:

    <global-results>
         <result name="notAuthenticated" type="redirect">login</result>
    </global-results>

The only difference error request goes to

org.apache.struts2.interceptor.MessageStoreInterceptor.java

and starts running

public String intercept(ActionInvocation invocation) throws Exception {
    LOG.debug("entering MessageStoreInterceptor ...");

    before(invocation);
    String result = invocation.invoke();
    after(invocation, result);

    LOG.debug("exit executing MessageStoreInterceptor");
    return result;
}

I have no idea why they works so different.

EDITED:
The problem was in interceptor order. The authenticate interceptor that should be redirect to login page was run AFTER interceptor that store something into the session.