This bug was fixed in the package haproxy - 1.5.14-1ubuntu0.15.10.1
--------------- haproxy (1.5.14-1ubuntu0.15.10.1) wily; urgency=medium
* Ensure that haproxy processes are terminated correctly when executing stop/restart operations, easing backports to pre-systemd versions of Ubuntu (LP: #1477198, #1481737).
-- James Page <email address hidden> Mon, 09 Nov 2015 16:51:46 +0000
This bug was fixed in the package haproxy - 1.5.14- 1ubuntu0. 15.10.1
--------------- 1ubuntu0. 15.10.1) wily; urgency=medium
haproxy (1.5.14-
* Ensure that haproxy processes are terminated correctly when executing
stop/restart operations, easing backports to pre-systemd versions of
Ubuntu (LP: #1477198, #1481737).
-- James Page <email address hidden> Mon, 09 Nov 2015 16:51:46 +0000