java.lang.IllegalStateException: getOutputStream() has already been called

<html>

<body>

java.lang.IllegalStateException: getOutputStream() has already been called for this response

org.apache.catalina.connector.Response.getWriter(Response.java:595)

org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:161)

org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:123)

org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:116)

org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:190)

org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:115)

org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:75)

org.apache.jsp.reports.cancel_jsp._jspService(org.apache.jsp.reports.cancel_jsp:82)

org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:99)

javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:325)

org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)

org.apache.jasper.servlet.JspServlet.service(JspServlet.java:245)

javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1069)

org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:274)

org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:455)

org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:320)

org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:279)

org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)

org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)

javax.servlet.http.HttpServlet.service(HttpServlet.java:689)