Haproxy mysql gone away with version 3.0 and not 1.8

Help!
1

Hi all,

I’ve upgraded my version haproxy from 1.8 to 3.0.5 and now i get error on applications “mysql gone away”. I reverted to 1.8 and the error is gone, but with version 3.0.5 get back the error.

One solution is stay with version 1.8 but i want upgrade to 3.0.5 for security issues.

I used haproxy on rocky 8 and the service is used only for mysql (galera)

My configuration:

defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           5m
    timeout connect         10s
    timeout client          5m
    timeout server          5m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 20000	
    load-server-state-from-file global

....

frontend galera
    bind x.x.x.x:3306
	mode tcp
    option tcpka
    option tcplog
    timeout client          480m

    acl ipgalera src -f /etc/haproxy/galera.lst
    use_backend galera if ipgalera    
    default_backend trash  
	
backend galera
    mode tcp
	timeout server 480m
	timeout connect 60s
	option external-check
    external-check path "/usr/bin:/bin:/usr/local/bin"
    external-check command /usr/local/bin/mysql_galera.sh
	
    server g1prod y.y.y.y:3306 check inter 5s fall 2 rise 1
    server g2prod z.z.z.z:3306 check inter 5s fall 2 rise 1 backup

Any idea about the problem exist with version 3.0.5 and not with 1.8?

Thank you for your help