JSPs and Filters

[Shyama Chandra]

The application frontend is displayed through JSPs and works fine when a compression filter is not enabled. When the filter is enabled, I get a Writer Already Obtained (IllegalStateException) from the Filter code. Attached below is the stackTrace. Any pointers to solve the same? The setup is on WebSphere 5.0
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[10/30/03 16:48:16:781 GMT+05:30] 7972a175 WebGroup E SRVE0026E: [Servlet Error]-[Writer already obtained]: java.lang.IllegalStateException: Writer already obtained
at com.ibm.ws.webcontainer.srt.SRTServletResponse.getOutputStream(SRTServletResponse.java:425)
at com.ibm.ws.webcontainer.servlet.HttpServletResponseProxy.getOutputStream(HttpServletResponseProxy.java:120)
at compressionFilters.CompressionResponseStream.<init>(CompressionResponseStream.java:100)
at compressionFilters.CompressionServletResponseWrapper.createOutputStream(CompressionServletResponseWrapper.java:160)
at compressionFilters.CompressionServletResponseWrapper.getWriter(CompressionServletResponseWrapper.java:231)
at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:202)
at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:193)
at org.apache.jasper.runtime.JspWriterImpl.flush(JspWriterImpl.java:246)
at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:197)
at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:255)
at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:249)
at org.apache.jsp._sbacop_5F_ctrl._jspService(_sbacop_5F_ctrl.java:302)
at com.ibm.ws.webcontainer.jsp.runtime.HttpJspBase.service(HttpJspBase.java:89)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:344)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.serviceJspFile(JspServlet.java:598)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.service(JspServlet.java:696)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:313)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:258)
at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:76)
at compressionFilters.CompressionFilter.doFilter(CompressionFilter.java:69)
at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:132)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:71)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:863)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:491)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:173)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:79)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:199)
at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
at com.ibm.ws.webcontainer.cache.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:114)
at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:187)
at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:331)
at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:432)
at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:343)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:592)
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[Bear Bibeault]

Howdy and welcome to the Ranch!
You'll find this forum a great place to seek help on JSP pages, and there aren't many rules you'll have to worry about, but one is that proper names are required. Please take a look at the JavaRanch Naming Policy and change your display name to match it.
Thanks!
bear
JSP Fourm Bartender