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
