On 09/23/2015 04:00 PM, Thiago Macieira wrote: > On Tuesday 22 September 2015 16:09:57 Bill Crocker wrote: >> 2 - During these periods, the invalid SYN cookies number on the server >> steadily rises: >> >netstat -ts | grep SYN >> 302658 invalid SYN cookies received<------- >> >netstat -ts | grep SYN >> 302745 invalid SYN cookies received<------- > > Hi Bill > > What are invalid SYN cookies here? Can you capture the traffic on the server > with tcpdump?
Thiago: Thanks for responding. I have since restarted the server and all is well again. I will have to wait for the failing behavior to happen again and then apply tcpdump and strace. Bill > > What class are you using here? QTcpSocket, QSslSocket or QNetworkReply? > QTcpSocket > For a regular QTcpSocket, RemoteHostClosedError only happens on > QNativeSocketEngine::read if the native read() call returned 0 (that is, EOF). > But that should only happen after the connection established successfully and > that doesn't match what you're seeing. Can you also capture the strace on the > client? I'm only interested in connect() and read() calls (strace -f -e > connect,read,close should do it). > _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
