100% cpu using resolvers with haproxy v1.8.9

[Stéphane Cottin]

Hi,

This simple test config file :
    resolvers mydns
          nameserver ns1 10.0.0.1:53
    listen mysql
      bind unix@/tmp/mysql.sock user www-data mode 600
      option mysql-check user haproxy post-41
      server MYSQL mysql.my.domain:3306 maxconn 100 check resolvers 
mydns

makes haproxy 1.8.9 eat a full cpu core, unless you remove the server 
resolvers option.

The same config with haproxy 1.8.8 only consume a few cpu cycles.

Stéphane