In your tests try to double check also the status of the machine TCP/UDP ports. On Windows the commad should be
netstat -an It helped me debugging an application I wrote that was consuming all the ports available in the machine (opening and closing consecutively a huge amount of TCP connections). Hope that helps, Calogero Il 21/03/2013 8.48, Till Oliver Knoll ha scritto: > Am 20.03.2013 um 23:00 schrieb Guido Seifert <warg...@gmx.de>: > >> Hi, >> I have here a strange problem. Probably not 100% ontopic for this list. But >> it is a Qt program. :-) >> >> My problem: I have three programs, which exchange data with a fourth program >> via tcp and udp. On my i7 and i5 with four cores it runs perfectly. It also >> runs perfectly on my partner's machines. Now I gave it to a few testers... >> and it was pure disaster. Bugs I have never seen before. From the >> description it seems to be some kind of deadlock. The main program just >> freezes. > Now we assume it is a deadlock caused by some race conditions for some > network (socket?) resources. But maye it is simply because the data is > sometimes wrong? Imagine one service would send image data "worth 4 > terrabytes" (because the "content size field" was wrongly set, or the > height/width fields), so what would your main program do? Would it try to > really create a QImage that large and hence be busy allocating virtual memory? > > That would be visible off course by its memory consumption which would grow > and grow. > > Off course my guess totally does not explain why it would (seem to) work on > some machines, and not on others (but that /could/ be a pure coincidence > which would wrongly lead us to believe it must be a threading/deadlock > problem). > > Cheers, > Oliver > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest -- Calogero Mauceri Software Engineer Applied Coherent Technology Corporation (ACT) www.actgate.com _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
