Hi Nick, On Wed, Feb 10, 2010 at 04:10:46PM +0000, Nick Chalk wrote: > Hello. > > I wonder if anyone can assist with this problem, reported by one of > our customers. > > The load balancer is running HAProxy 1.4-rc1, with a modified version > of the HTTP ECV patch applied. The customer is using ECV to check the > status of a pair of IIS web servers:
Did you managed to fix the several remaining issues which could cause it to crash the process ? > listen web 10.3.4.150:80 > mode tcp > option httpchk GET /gccheck.cfm HTTP/1.0 > http-check expect rstring gCokay > balance source > server realserver1 10.4.1.6:80 weight 1 check inter 2000 rise 2 fall 3 > server realserver2 10.4.1.16:80 weight 1 check inter 2000 rise 2 fall 3 > server backup 127.0.0.1:9081 backup > option redispatch > option abortonclose > maxconn 40000 > log global > > We are seeing both real servers repeatedly going on- and off-line with > a period of tens of seconds. Packet tracing, stracing, and adding > debug code to HAProxy itself has revealed that the real servers are > always responding correctly, but HAProxy is sometimes receiving only > part of the response. Indeed, the checks are rather simple right now, they parse the response at once. Krzysztof Oledsky proposed a patch to make use of recv(MSG_PEEK) in order to leave incomplete data in kernel buffers instead of consuming it. I don't think it could have any side effect, you may want to try it. It was about 3-4 weeks ago on the list. Regards, Willy
