Question

A company runs a stateless web application behind an Application Load Balancer (ALB) with an EC2 Auto Scaling group across three Availability Zones. During scale-in events, users occasionally report failed requests and reset connections. The CloudOps engineer confirms that instances are being terminated while still actively serving in-flight requests. Which configuration change will MOST directly prevent these dropped requests during scale-in?

Accepted Answer

Increase the ALB target group deregistration delay (connection draining) so in-flight requests can complete before instances are terminated

Answer

Enable cross-zone load balancing on the Application Load Balancer

Answer

Change the target group health check protocol from HTTP to HTTPS

Answer

Increase the Auto Scaling group health check grace period