IllegalStateException using custom tag

Question

I'm receiving the following exception when trying to use a custom tag we are developing to allow us to provide localized content based on the users browser language/country settings:
     java.lang.IllegalStateException: WEB3025: Cannot reset after response has been committedThe thing is - the tag works perfectly when the page is using JSP includes:
     <jsp:include page="/components/headers/global.jsp" />but we get the exception when using our tag:
     <core:localizedInclude page="/components/headers/global.jsp" />and we make a call to our servlet:
     <jsp:forward page='/servlet/MyServlet' />Here is the line in the custom tag Java code that pulls in the file:
     pageContext.include(localizedPage);Any ideas what we can do to fix this? What are the differences between the <jsp:include> and our <core:LocalizedInclude> in this case?
Bob

Answer 1

The pagecontext 's include method flushes the buffer before a call to this method. This means the call to your tag from the jsp should be the first line in your jsp as headers have to be set first before writing any html response.
Here's the relevant javadoc.
blah..blah..
The current JspWriter "out" for this JSP is flushed as a side-effect of this call, prior to processing the include.
blah..blah..You could try the overloaded pageContext.include("path", false) which according to javadoc
blah..blah..
If flush is true, The current JspWriter "out" for this JSP is flushed as a side-effect of this call, prior to processing the include. Otherwise, the JspWriter "out" is not flushed.
blah..blah..cheers,
ram.