Hi tom, Can you share us your configuration? HAProxy seems to be queueing the connection (maxconn set to 1??) and the timeout queue (setup to 5s in your case??) has expired so the connection is not forwarded to the server.
Of course, I want you to send us some comments with your configuration, we need to understand why you did configure your settings :) Baptiste On Tue, Oct 1, 2013 at 2:18 PM, Tom Huybrechts <tom.huybrec...@gmail.com> wrote: > Hi all, > > I'm using haproxy 1.4.23 on Windows Server 2008 to proxy tcp connections to > a single backend server. Usually this is going well, but occasionally a > client has issues: connections get dropped and they are unable to make new > ones. > > Investigation of the logs show server-side timeouts: > > [01/Oct/2013:12:06:10.653] binary binary/<NOSRV> 5015/-1/5015 0 sQ > 40/33/33/0/0 0/1 > [01/Oct/2013:12:06:10.653] binary binary/<NOSRV> 5015/-1/5015 0 sQ > 39/32/32/0/0 0/2 > [01/Oct/2013:12:06:15.934] binary binary/<NOSRV> 5000/-1/5000 0 sQ > 42/36/36/0/0 0/1 > [01/Oct/2013:12:06:17.231] binary binary/<NOSRV> 5062/-1/5062 0 sQ > 42/36/36/0/0 0/2 > [01/Oct/2013:12:06:17.247] binary binary/<NOSRV> 5046/-1/5046 0 sQ > 41/35/35/0/0 0/3 > [01/Oct/2013:12:06:19.856] binary binary/<NOSRV> 5015/-1/5015 0 sQ > 40/34/34/0/0 0/4 > [01/Oct/2013:12:06:19.856] binary binary/<NOSRV> 5015/-1/5015 0 sQ > 39/33/33/0/0 0/5 > [01/Oct/2013:12:06:21.012] binary binary/<NOSRV> 5031/-1/5031 0 sQ > 38/32/32/0/0 0/5 > > I have no idea why: the server is not under heavy load. > > I have a wireshark dump of one such occasion. I expected to at least see SYN > packets going from haproxy to server in this timeframe, but there where > none. In the meanwhile other connections from haproxy to the same server > continued without problems. > > Any hints to what's wrong, or what I can do to investigate further? > > Tom >
