Tough to diagnose remotely without more information :-( Usually an
IllegalStateException on a redirect is the result of the response having
been committed, but you say the response isn't being touched by your
action. My guess would be that it's being touched by something else...
If you can't find anything else relevant in the logs, try upping the log
level to DEBUG. That may provide a clue. Failing that, it's time to dig
out the debugger and/or start adding instrumentation to see what's
really happening in the failure case.
L.
Thomas Okken wrote:
Hi all,
I'm running into a problem in a struts application I'm working on.
In my struts-config.xml, I have this action-mapping:
<action path="/register"
scope="session"
name="RegistrationForm"
type="com.foo.RegistrationAction">
<forward name="success" path="/index.jsp" redirect="true"/>
<forward name="failure" path="/register.jsp" redirect="true"/>
</action>
The RegistrationAction.execute() method takes several request parameters
and uses them to create an account; when this is successful, it returns
mapping.findForward("success"), and otherwise, it returns
mapping.findForward("failure").
For reasons I have not been able to determine, the redirection often
fails. RegistrationAction.execute() will run successfully, the
mapping.findForward() succeeds and finds the correct forward, which is
then returned -- but an exception is thrown while the redirect is sent
to the client. This is the full log output:
Jan 9, 2008 11:11:35 AM org.apache.catalina.core.StandardWrapperValve
invoke
SEVERE: Servlet.service() for servlet action threw exception
java.lang.IllegalStateException
at
org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:435)
at
org.apache.struts.chain.commands.servlet.PerformForward.handleAsRedirect(PerformForward.java:125)
at
org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:94)
at
org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:54)
at
org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at
org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:595)
Jan 9, 2008 11:11:35 AM org.apache.catalina.core.StandardHostValve custom
SEVERE: Exception Processing
ErrorPage[exceptionType=java.lang.Exception, location=/error.jsp]
java.lang.IllegalStateException
at org.apache.coyote.Response.reset(Response.java:297)
at org.apache.catalina.connector.Response.reset(Response.java:652)
at org.apache.catalina.connector.Response.reset(Response.java:916)
at
org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:417)
at
org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:271)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:595)
I understand that the second exception happens because, after sending a
redirect, it is no longer possible to forward to the error page, but
what is a complete mystery to me is why the first exception occurs.
RegistrationAction.execute() never touches the response, so struts
should have no problem sending the redirect to /index.jsp (or back to
/register.jsp, in the case of failure).
This exception does not happen consistently. Sometimes it does,
sometimes it doesn't, with no pattern that I have been able to find.
Even when I post the exact same request over and over.
- Thomas
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