Q44 — AWS SOA-C02 Ch.1

Question 44 of 100 | ← Chapter 1

A company has a stateful web application that is hosted on Amazon EC2 instances in an Auto Scaling group. The instances run behind an Application Load Balancer (ALB) that has a single target group. The ALB is configured as the origin in an Amazon CloudFront distribution. Users are reporting random logouts from the web application. Which combination of actions should a SysOps administrator take to resolve this problem? (Choose two.)

• A. Change to the least outstanding requests algorithm on the ALB target group.
• B. Configure cookie forwarding in the CloudFront distribution cache behavior.
• C. Configure header forwarding in the CloudFront distribution cache behavior. ✓
• D. Enable group-level stickiness on the ALB listener rule.
• E. Enable sticky sessions on the ALB target group. ✓

Correct Answer: C. Configure header forwarding in the CloudFront distribution cache behavior., E. Enable sticky sessions on the ALB target group.

Explanation

用户会话中断通常与会话保持机制有关。AWS文档指出，有状态应用需确保请求路由的一致性。ALB的粘性会话（目标组级别）可将用户请求定向到同一实例，防止因负载均衡导致的会话丢失。CloudFront默认不转发特定头或Cookie，配置缓存行为中的Cookie转发确保会话信息传递至源站。选项B涉及CloudFront正确处理会话Cookie，选项E确保ALB维持会话粘性。其他选项未直接关联会话保持的核心配置。