1. Create test route 
2. oc annotate route test --overwrite haproxy.router.openshift.io/timeout=99999999999999999s
3. Restart ingress pods

Ingress goes into crashloopbackoff

Logs: 

[ALERT] 132/170130 (382) : parsing [/var/lib/haproxy/conf/haproxy.config:245] : timer overflow in argument '99999999999999999s' to 'timeout server' (maximum value is 2147483647 ms or ~24.8 days)
[ALERT] 132/170130 (382) : Error(s) found in configuration file : /var/lib/haproxy/conf/haproxy.config
[ALERT] 132/170130 (382) : Fatal errors found in configuration.

Route should fail validation and not get accepted. 

This dev operation should not bring down ingress for the WHOLE cluster.