Newlines at the end of JSPs cause IllegalStateException
-------------------------------------------------------
Key: WW-3610
URL: https://issues.apache.org/jira/browse/WW-3610
Project: Struts 2
Issue Type: Bug
Reporter: Dustin Digmann
We created a new JSP recently. It does not have a corresponding Action class,
straight JSP. This JSP was creating the following exception:
java.lang.IllegalStateException: getOutputStream() has already been called for
this response
at org.apache.catalina.connector.Response.getWriter(Response.java:599)
at
org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:195)
at
org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:124)
at
org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:117)
at
org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:191)
at
org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:115)
at
org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:75)
at
com.conducivetech.pathfinder.flightstats2.jsp.Mobile.ga_jsp._jspService(Unknown
Source)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:389)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at
org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:54)
at
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:174)
at
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:754)
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:684)
at
org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:876)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
Users did not seem to be affected. This was in the background.
After the last "%>" within this JSP there was a newline. Removing this newline
removed the exception.
Can an update be made to ignore EOF newlines and whitespace?
Note: I do not have a shareable example at this moment. I might be able to put
one together upon request.
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