Can you verify your 2 threads (reading input an error) are launched ? Can you confirm you are getting the problem only on Windows ?
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
