Haproxy doesnt allow all mqtt packets to be acknowledged correctly due to the warning shown from haproxy warning

[kushal bhattacharya]

[WARNING] 307/180334 (2743) : [haproxy.main()] Cannot raise FD limit to
12011, limit is 4096.
[WARNING] 307/180334 (2743) : [haproxy.main()] FD limit (4096) too low for
maxconn=6000/maxsock=12011. Please raise 'ulimit-n' to 12011 or more to
avoid any trouble.