Amazon Linux (kernel version 3.14) In addition to the "failed connection attempts", I also noticed that I was getting an equal number of "resets received for embryonic SYN_RECV sockets".
On Sat, May 16, 2015 at 4:40 AM, Willy Tarreau <[email protected]> wrote: > On Wed, May 13, 2015 at 10:19:56AM -0500, Chris Gilmore wrote: > > I've found the commit that caused this change in behavior. > > >From 1.4.23: > > - MEDIUM: checks: avoid accumulating TIME_WAITs during checks > > > > commit fd29cc537b8511db6e256529ded625c8e7f856d0 > > > > So, it appears it is a feature and not a bug. > > Yes indeed, otherwise you cannot connect anymore from the local ports to > the servers. What OS are you running on ? At least on Linux we can > disable the TCP quick-ack which allows us to close the connection > before the connection's ACK is sent, and it's clean because the > server sees SYN, SYN-ACK, RST and doesn't even create a socket nor > notifies the application. > > Willy > >
