If you can post a Mavenized example, I could have time to run it and watch at it.
Regards Jeff On Mon, Jun 25, 2012 at 11:40 AM, Laurent Petit <lpe...@yseop.com> wrote: > Hello, > > Is there anything I can do to help qualify the problem even more ? > > Beyond having shown the source code of the servlet, would a fully > mavenized example help? Anything else? > > Regards, > > -- > Laurent > > > On Fri, 2012-06-22 at 10:21 +0200, Laurent Petit wrote: > > Hello, > > > > On Thu, 2012-06-21 at 22:53 +0200, Jeff MAURY wrote: > > > Is it specific to Wordpad or any launched process will do the trick ? > > > Do you tried with a non UI process (console) ? > > > > > > I did an additional test, as you suggested, with a non UI process (a > > small java executable launched in headless mode, whose purpose was just > > to wait for 20 seconds before exiting). > > > > I can reproduce the problem with this headless executable: the HTTP > > client is blocked until the 20 seconds elapse and the process is killed. > > > > > > Here is the modified servlet code I used: > > > > https://www.refheap.com/paste/3285 > > > > > > and here is the code for the small java program: > > > > https://www.refheap.com/paste/3286 > > > > > > > > Regards, > > > > -- > > Laurent > > > > > > > > > > > > Jeff > > > > > > On Thu, Jun 21, 2012 at 10:45 PM, Laurent Petit <lpe...@yseop.com> > wrote: > > > > > > > En Réponse à "Tomcat Users List" <users@tomcat.apache.org> le 21 > juin > > > > 2012 00:07 Can you verify your 2 threads (reading input an error) are > > > > launched ? Yes they are. Verified. Can you confirm you are getting > the > > > > problem only on Windows ? Yes sir, we're unable to reproduce it on > Ubuntu. > > > > Jeff On Wed, Jun 20, 2012 at 4:19 PM, Laurent Petit < > lpe...@yseop.com> > > > > wrote: > Hello, > > I have a problem with keep-alive connections, > when > > > > starting a subprocess > (via JDK's default ProcessBuilder/Process > API), > > > > while also having > started Tomcat with the APR HTTP/1.1 Connector. > > > The > > > > problem symptom is with Keep-Alive connection, as follows: > > - the > client > > > > (browser, jmeter, etc.) sends a first request > - the servlet starts > a > > > > Process for e.g. wordpad.exe > - the servlet returns an > acknowledgment html > > > > content, sets the content > length, flushes the writer, and returns > > - the > > > > client displays the received acknowledgement html content, sends > > the > > > > second request to the server. > - the server doesn't answer. No > Tomcat log > > > > ever reports the start of > something received. > - Then when on the > server > > > > you close the wordpad.exe instance, the server > finally handles the > second > > > > request. > > I have created a small servlet code which reproduces the > > > > problem. > For the demo, it suffices to have the started subprocess > be > > > > > "wordpad.exe". Of course my real process is more interesting than > > that > > > > :-). > > You can find the servlet code for reproducing the test > here: > > > > > > https://www.refheap.com/paste/3254 > > > To reproduce the problem > > > > deterministically, the ConnectionTimeout for > the APR HTTP > Connector in > > > > servlet.xml must be set sufficiently low. > With my boxes, I get a > 100% > > > > error hit when set at 200 ms. > > You can find here the jmeter > script which > > > > hits the same page again and > again with "keep-alive" option set > on: > > > > > > https://www.refheap.com/paste/3255 > > > So far, the only reliable > > > > solution we have found to work around this > problem is to not use > the > > > > HTP/1.1 APR Connector. > > > My configuration : > Windows 2008 US > std R2 > > > > 64bits > Tomcat 6.0.32 64 bits > Java 6u30 64 bits(Oracle) > > Same > issue > > > > has been observed on Windows 7 32 bits. > > Was not able to > reproduce the > > > > issue on Linux Ubuntu Desktop 11.10 or > 12.04. > > > Thanks for your > > > > support, ideas, solutions, etc. > > > > > > > > > --------------------------------------------------------------------- > To > > > > unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For > additional > > > > commands, e-mail: users-h...@tomcat.apache.org > > -- Jeff MAURY > "Legacy > > > > code" often differs from its suggested alternative by actually > working and > > > > scaling. - Bjarne Stroustrup http://www.jeffmaury.com > > > > http://riadiscuss.jeffmaury.com http://www.twitter.com/jeffmaury > > > > > > > > > > > > > > > > -- > Laurent Petit > > Agence +33 (0)4 78 47 07 49 > > Email lpe...@yseop.com > > > > > > > > Yseop apporte une réponse intelligente et individualisée à chacun de vos > clients > > > > www.yseop.com > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > -- Jeff MAURY "Legacy code" often differs from its suggested alternative by actually working and scaling. - Bjarne Stroustrup http://www.jeffmaury.com http://riadiscuss.jeffmaury.com http://www.twitter.com/jeffmaury
