Hi Oleg, Many thanks for the guidance, working much better now :)
Al On Thu, Jul 17, 2008 at 2:56 PM, Oleg Kalnichevski <[EMAIL PROTECTED]> wrote: > On Wed, 2008-07-16 at 16:19 -0700, Algirdas Veitas wrote: > > Hi, > > > > Our application is using HttpClient 3.0.1 and is experiencing "long wait > > times" (started happening recently it seems) in the method > > MultiThreadedHttpConnectionManager.doGetConnection(...). To give a > summary > > of the application, we have a bunch of threads (message driven beans, > JBoss > > 4.0.2, JDK 1.4) that are processing a message, creating xml out of it > and > > then sending the xml over an HTTP Post. The HTTP Post is always to one > > static URL and the target web server is IIS. Threads are running > > concurrently and have a cap of 30 in the pool, all threads are pretty > much > > constantly processing a request. We release the connection in our > finally > > block (if (postMethod != null) { postMethod.releaseConnection(); } ) > > > > As an example of the long wait times, we profiled one of our worker > threads > > and it took 3781 ms to process a message and do the HTTP Post. Out of the > > 3781 ms, 3628 ms are within > > MultiThreadedHttpConnectionManager.doGetConnection(...) versus 67 ms to > > perform the actual HTTP Post (via PostMethod.execute()). > > > > Our profiler shows that methods called within > > MultiThreadedHttpConnectionManager.doGetConnectiont(...) take no more > than 1 > > ms. > > > > Not sure what to make of this at this point, but it seems strange that > there > > is such a long wait time. We wire up the HttpClient configuration via > > Spring, but essentially it looks like this: > > > > httpConnectionManagerParams.setMaxConnections(40); > > httpConnectionManagerParams.setSoTimeOut(1500); > > > multiThreadedHttpConnectionManager.setParams(httpConnectionManagerParams); > > > > httpClient.setHttpConnectionManager(multiThreadedHttpConnectionManager); > > > > Has anyone experienced such behavior before? Perhaps need to fine tune > the > > configuration? > > > > Please let me know if more information is needed, will certainly provide > it. > > > > Thanks, > > Al > > Per default HttpClient uses only two simultaneous connections to the > same host regardless of how many total connections are allowed. Try > increasing the number of maximum connections per host. > > Hope this helps > > Oleg > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >