Le Lundi 4 Janvier 2010 23:43:14, Willy Tarreau a écrit :
> Hi Cyril,
>
> On Mon, Jan 04, 2010 at 10:21:40PM +0100, Cyril Bonté wrote:
> > Hi Willy,
> > I didn't have much time for tests but I can make some first feedbacks.
>
> That's fortunate because I spent the day again chasing some remaining
> CLOSE_WAIT issues. I finally found horrified that the response parser
> which for a long time was the last analyser did not set a correct return
> code, making it impossible for the forwarded to see the data pass the
> first time. Also my fears on the ugly state machines were founded. I
> found several cases where they could not work. So I have reworked them
> as I initially wanted to except that this time I found how to :-)
Yes, I've seen the commit. I've had some problems with the nigthly snapshot
that looked like this issues, so I've used a git snapshot, it looks better but
I have some problems again.
It's not easy to reproduce, so to "facilitate", the configuration file is
minimal (no timeout, no tuning), and maxconn 1 on the proxy as an extreme limit:
listen haproxy :8080
mode http
option http-server-close
maxconn 1
server backend 127.0.0.1:80
Then I launch this sequence :
for i in `seq 10`;
do
echo -ne "GET / HTTP/1.1\nHost: localhost\nConnection: Keep-alive\n\n"|nc
localhost 8080&
done
sleep 60
killall nc
Just after killing the clients (nc)
netstat -atn|grep ":8080" gives something like :
tcp 0 0 0.0.0.0:8080 0.0.0.0:*
LISTEN
tcp 0 0 127.0.0.1:8080 127.0.0.1:33442
SYN_RECV
tcp 0 0 127.0.0.1:8080 127.0.0.1:33439
SYN_RECV
tcp 0 0 127.0.0.1:33440 127.0.0.1:8080
FIN_WAIT2
tcp 0 56 127.0.0.1:33438 127.0.0.1:8080
FIN_WAIT1
tcp 0 0 127.0.0.1:8080 127.0.0.1:33437
ESTABLISHED
tcp 0 0 127.0.0.1:33433 127.0.0.1:8080
TIME_WAIT
tcp 0 56 127.0.0.1:33437 127.0.0.1:8080
FIN_WAIT1
tcp 0 0 127.0.0.1:8080 127.0.0.1:33438
ESTABLISHED
tcp 56 0 127.0.0.1:8080 127.0.0.1:33440
CLOSE_WAIT
tcp 0 56 127.0.0.1:33439 127.0.0.1:8080
FIN_WAIT1
tcp 0 56 127.0.0.1:33442 127.0.0.1:8080
FIN_WAIT1
OK, here begins the problem. I wait some seconds (or minutes) and then, the
final state of the connections becomes :
netstat -atn|grep ":8080"
tcp 0 0 0.0.0.0:8080 0.0.0.0:*
LISTEN
tcp 0 0 127.0.0.1:8080 127.0.0.1:33437
ESTABLISHED
tcp 0 0 127.0.0.1:8080 127.0.0.1:33438
ESTABLISHED
tcp 56 0 127.0.0.1:8080 127.0.0.1:33440
CLOSE_WAIT
haproxy can't accept connections anymore.
I'll try to do more tests on this tomorrow evening.
--
Cyril Bonté
