There is no clipValue function for the annotation router.openshift.io/haproxy.health.check.interval. Once any value with abnormal values, the router-default starts to report the following messages:

[ALERT]    (50) : config : [/var/lib/haproxy/conf/haproxy.config:13791] : 'server be_secure:xxx:httpd-gateway-route/pod:xxx:xxx-gateway-service:pass-through-https:10.129.xx.xx:8243' : timer overflow in argument <50000d> to <inter> of server pod:xxx:xxx:pass-through-https:10.129.xx.xx:8243, maximum value is 2147483647 ms (~24.8 days)..

In the above case, the value 50000d was passed to the route annotation router.openshift.io/haproxy.health.check.interval accidentally

Easily

1. Run the following script and this will break the cluster

oc get routes -A | awk '{print $1 " " $2}' | tail -n+2 | while read line; do    
 read -r namespace routename <<<$(echo $line)   echo -n "NS: $namespace | "   echo "ROUTENAME: $routename"   
 CMD="oc annotate route -n $namespace $routename --overwrite router.openshift.io/haproxy.health.check.interval=50000d"   
 echo "Annotating route with:"   
 echo $CMD ; eval "$CMD"  
 echo "---" 
done     

    The alert messages are reported and the router-default pod never reaches the ready state.

    Clip the value in order to prevent the issue