Output Stream already obtained Exception in Websphere

[Manuel DeAngelo]

We have the following problem in our WebSphere Server:

When out users submit an order, they get sometimes an exeption page. The WAS Logs show the exception below.

Has anyone any idea what the problem could be?

Some infos:
The application is a java struts app with iText, spring and hibernate (middleware, separated). The WAS version 6.1.0.5 is running on a Solaris machine and before is a F5 Loadbalancer with HTTPS
We had no deployment, it seems that this had just started sometime ago.

If you need more info please just ask.

Thanks for any help in advance.

greets, Manuel

[10/22/09 8:55:53:368 CEST] 00000115 WebApp        A   SRVE0181I: [my-application_war#my-application.war] [/myapplication] [Servlet.LOG]: Error Page Exception: : com.ibm.ws.webcontainer.webapp.WebAppErrorReport: SRVE0199E: OutputStream already obtained
	at com.ibm.ws.webcontainer.webapp.WebApp.sendError(WebApp.java:2769)
	at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:111)
	at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:744)
	at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1433)
	at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:100)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:394)
	at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:102)
	at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:152)
	at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:213)
	at com.ibm.io.async.AbstractAsyncFuture.fireCompletionActions(AbstractAsyncFuture.java:195)
	at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
	at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:195)
	at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:743)
	at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:873)
	at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1469)
Caused by: javax.servlet.ServletException: SRVE0199E: OutputStream already obtained
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:166)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:761)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:673)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:498)
	at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:464)
	at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:122)
	at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:196)
	at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:606)
	at org.apache.struts.action.RequestProcessor.doInclude(RequestProcessor.java:1116)
	at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:260)
	at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:239)
	at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:302)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:989)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:930)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:118)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:761)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:673)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:498)
	at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:464)
	at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:606)
	at com.ibm.ws.webcontainer.webapp.WebApp.sendError(WebApp.java:2721)
	... 15 more
---- Begin backtrace for Nested Throwables
java.lang.IllegalStateException: SRVE0199E: OutputStream already obtained
	at com.ibm.ws.webcontainer.srt.SRTServletResponse.getWriter(SRTServletResponse.java:543)
	at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:187)
	at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:175)
	at org.apache.jasper.runtime.JspWriterImpl.flush(JspWriterImpl.java:231)
	at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:889)
	at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:462)
	at com.ibm._jsp._layout._jspx_meth_tiles_insert_0(_layout.java:294)
	at com.ibm._jsp._layout._jspService(_layout.java:123)
	at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:85)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:989)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:930)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:118)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:761)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:673)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:498)
	at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:464)
	at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:122)
	at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:196)
	at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:606)
	at org.apache.struts.action.RequestProcessor.doInclude(RequestProcessor.java:1116)
	at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:260)
	at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:239)
	at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:302)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:989)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:930)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:118)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:761)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:673)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:498)
	at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:464)
	at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:606)
	at com.ibm.ws.webcontainer.webapp.WebApp.sendError(WebApp.java:2721)
	at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:111)
	at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:744)
	at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1433)
	at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:100)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:394)
	at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:102)
	at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:152)
	at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:213)
	at com.ibm.io.async.AbstractAsyncFuture.fireCompletionActions(AbstractAsyncFuture.java:195)
	at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
	at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:195)
	at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:743)
	at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:873)
	at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1469)

[Jeanne Boyarsky]

That error means an exception was thrown in your view layer (JSP, Tiles, iText). The way to find the actual exception is through debugging. Can you reproduce this in a non-production environment?

[Manuel DeAngelo]

Sorry for not answering sooner.

We tried to reproduce this error (local with a stress test and in a Test Environment) but we were not able to reproduce the error.

greets, Manuel