Token session interceptor still firing Nullpointer exceptions under Internet 
Explorer 7
---------------------------------------------------------------------------------------

                 Key: WW-2736
                 URL: https://issues.apache.org/struts/browse/WW-2736
             Project: Struts 2
          Issue Type: Bug
          Components: Core Interceptors
    Affects Versions: 2.1.2, 2.1.1, 2.1.0, 2.0.11.2, 2.0.11.1, 2.0.11
         Environment: IE7, tomcat 6.0.16, struts 2.0.11 
            Reporter: Anton Tonchev


It didn't handle the multiple submit clicks (more than two) - they ended in 
blank screen with address pointing to the update action and a null pointer 
exception in the console:
   java.lang.NullPointerException
        at org.apache.catalina.connector.Response.toAbsolute(Response.java:1485)
        at 
org.apache.catalina.connector.Response.encodeRedirectURL(Response.java:1090)
        at 
org.apache.catalina.connector.ResponseFacade.encodeRedirectURL(ResponseFacade.java:377)
        at 
javax.servlet.http.HttpServletResponseWrapper.encodeRedirectURL(HttpServletResponseWrapper.java:84)
        at 
de.hybris.platform.util.RootRequestFilter$HybrisResponseWrapper.encodeRedirectURL(RootRequestFilter.java:347)
        at 
javax.servlet.http.HttpServletResponseWrapper.encodeRedirectURL(HttpServletResponseWrapper.java:84)
        at 
org.apache.struts2.dispatcher.ServletRedirectResult.doExecute(ServletRedirectResult.java:146)
        at 
org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:178)
        at 
org.apache.struts2.dispatcher.ServletActionRedirectResult.execute(ServletActionRedirectResult.java:189)
        at 
com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:348)
        at 
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:253)
        at 
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:221)
        at 
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)
        at 
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
        at 
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
        at 
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
        at 
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
        at 
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:150)
        at 
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:48)

The double clicks worked ok, and returned the user to the expected page without 
doing the action twice.

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