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
