6.1 SP5: response.sendRedirect crashes

Question

Hi all,
I am porting a JSP app from Iplanet 4.1 to SunONE 6.1 SP5 (Solaris 5.9).
When I try to do the above statement in a JSP, I get the following in the error log:
[14/Jun/2007:16:05:05] failure ( 3812): for host 172.16.10.184 trying to POST /jspcontent/ozbet.jsp;jsessionid=43DBC3EA6343C4B0E3BF6AD26B943D25, service-j2ee reports: StandardWrapperValve[jsp]: WEB2792: Servlet.service() for servlet jsp threw exception
java.lang.IllegalStateException
at org.apache.catalina.connector.HttpResponseFacade.sendRedirect(HttpResponseFacade.java:179)
at jsps.jspcontent._ozbet_jsp._jspService(_ozbet_jsp.java:109)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:908)
at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(JspServlet.java:687)
at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(JspServlet.java:459)
at com.iplanet.ias.web.jsp.JspServlet.service(JspServlet.java:375)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:908)
at org.apache.catalina.core.StandardWrapperValve.invokeServletService(StandardWrapperValve.java:771)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:322)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:509)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:509)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:209)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:509)
at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:161)
at com.iplanet.ias.web.WebContainer.service(WebContainer.java:580)
I am not sure what I need to declare differently in 6.1. The web app jars are in WEB-INF/lib under the docroot.
The code in the JSP is pretty standard, but ran under Iplanet 4.1.
try {
     String URL = "https://www.ozbet.com.au/tab/ozbet.htm?p_date=" //has parameters;
response.sendRedirect(URL);
catch (ApplicationException e) {
     //do some stuff here
%>
<b>ERROR:</b> <%= msg %>"
<%
FYI the webapp is working fine wrt to jdbc, jsp etc. It is just the sendRedirect() that is crashing.
Do I need to declare anything related to NSAPI in obj.conf ?
Please help and thanks in advance.
Richard
Message was edited by:
r_defonseka
Message was edited by:
r_defonseka

Answer 1

That's not a crash. HttpServletResponse.sendRedirect is throwing an IllegalStateException because you called it after the response had been committed. This is a documented part of the Servlet spec. (See, for example, http://java.sun.com/j2ee/sdk_1.3/techdocs/api/javax/servlet/http/HttpServletResponse.html#sendRedirect(java.lang.String) for the the J2EE 1.3 docs.)
The most likely problem is that you're calling sendRedirect after an include or after outputting too much data. If you're going to call sendRedirect, you need to do so near the top of your JSP file, before you output a lot of data. Once data has been sent to the client, there's no way for the server to say "oops, never mind, ignore that data and redirect over here instead".