are you sure it is calling your servlet twice? I only see one redirect in the log and I don't see the "entering zzz" at all as defined in your code sample. This could be that IE sends a HEAD request at the same time as the POST request. Normally the HEAD request is handled by Tomcat, so it wouldn't get to your servlet.
Charlie > -----Original Message----- > From: hacking bear [mailto:[EMAIL PROTECTED]] > Sent: Friday, January 03, 2003 3:02 PM > To: [EMAIL PROTECTED] > Subject: Re: Duplicate servlet invocation on a single request > > > Hi, > > I desperately need help. Can someone help me? Thanks. > > I copy the log output here. As you can see, thread 3 and 5 > are handling the > same addRef.do request for the same session. > > [DEBUG] (Thread-3) TransactionFilter: session > 08A98E9D18703D2F3B44E81975F4B387 transaction > impl.TransactionContext@40f3c1 > request URL /addRef.do > [INFO] (Thread-3) Joining transaction... > [DEBUG] (Thread-3) Get into class servlet.AddRefAction:doPost > request=org.apache.coyote.tomcat4.CoyoteRequestFacade@749ebc > [DEBUG] (Thread-3) request url: /addRef.do > [DEBUG] (Thread-5) TransactionFilter: session > 08A98E9D18703D2F3B44E81975F4B387 transaction > impl.TransactionContext@40f3c1 > request URL /addRef.do > [DEBUG] (Thread-3) Submitted parameters: > [DEBUG] (Thread-3) param: _action value: OK > [DEBUG] (Thread-3) param: users value: > uitest.Power_User:1041623306967 > uitest.User:1041623306968 > [INFO] (Thread-5) Joining transaction... > [DEBUG] (Thread-3) param: contextId value: 8 > [DEBUG] (Thread-5) Get into class servlet.AddRefAction:doPost > request=org.apache.coyote.tomcat4.CoyoteRequestFacade@618565 > [DEBUG] (Thread-3) param: cancel value: Cancel > [DEBUG] (Thread-5) request url: /addRef.do > [DEBUG] (Thread-5) param: _action value: OK > [DEBUG] (Thread-5) param: users value: > uitest.Power_User:1041623306967 > uitest.User:1041623306968 > [DEBUG] (Thread-5) param: contextId value: 8 > [DEBUG] (Thread-5) param: cancel value: Cancel > [DEBUG] (Thread-3) popContext 8 > [DEBUG] (Thread-3) Redirect to > /jsp/edit.jsp?contextId=7&&model=uitest.User_Group&eo=uitest.U > ser_Group:1041623306969 > > > >From: "hacking bear" <[EMAIL PROTECTED]> > >Reply-To: "Tomcat Users List" <[EMAIL PROTECTED]> > >To: [EMAIL PROTECTED] > >Subject: Duplicate servlet invocation on a single request > >Date: Fri, 03 Jan 2003 01:10:25 -0800 > > > >Hello, > > > >I get this interesting behavior. I have HTML forms which posts to > >servlets, in the order like > > > >form1.jsp --post-> MyServlet1 --redirect-> form2.jsp > > --post-> MyServlet2 --redirect-> form1.jsp > > > >Each servlet looks like following: > > > >class MyServletX extends HttpServlet { > > // complete re-entrant, no share access > > public doPost(request, response) { > > log.debug("entering "+getClass()); > > // ... process the request, nothing written out > > String redirectUrl = .... > > response.sendRedirect(redirectUrl); > > } > >} > > > >There is also a filter invoked in each step which simply > sets a variable > >and pass to the next. > > > >But when form2.jsp is submited, Tomcat (latest release 4.1) invokes > >MyServlet2 twice in different threads for this same request, > as evident > >from the log output. Further if I ran tomcat in debugger and place > >breakpoint in doPost, this would not happen (I have yet to > try putting a > >sleeping timer in it). And making the servlet > SingleThreadModel does not > >help. While I don't know if this is a threading problem in > tomcat, invoking > >the servlet twice on the same requst is real problem. > > > >I searched through the mailing list archive, I read that > request would not > >be handled by two threads, which I assumed was the case. > > > >So what went wrong here? In circumstance would the request > being processed > >twice? > > > >Thanks. > > > > > >_________________________________________________________________ > >Add photos to your e-mail with MSN 8. Get 2 months FREE*. > >http://join.msn.com/?page=features/featuredemail > > > > > >-- > >To unsubscribe, e-mail: > ><mailto:[EMAIL PROTECTED]> > >For additional commands, e-mail: > ><mailto:[EMAIL PROTECTED]> > > > _________________________________________________________________ > Help STOP SPAM: Try the new MSN 8 and get 2 months FREE* > http://join.msn.com/?page=features/junkmail > > > -- > To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
