Skip to content
By using AWS re:Post, you agree to the AWS re:Post Terms of Use
AWS re:Postre:Post
About re:Post

AWS ELB lots of 5xx when facing high peak

0

I am experiencing a high number of ELB 5xx errors where it did not forward the traffic to my ECS targets, during a high peak where access went up from 10k to 60k per minute.

After research we are quite confident that it is not anything in here: https://docs.aws.amazon.com/elasticloadbalancing/latest/application/load-balancer-troubleshooting.html. And also the ECS service itself is running well. Anyone has any idea what could be the bottleneck for ELB?

  • Franky Chen
    4 years ago

    Could you please clarify which 5xx you saw? 502, 503, 500 or other? When 5xx error occurred, can you check if all ECS targets are healthy and reachable?

Topics
MicroservicesNetworking & Content Delivery
Tags
MicroservicesElastic Load Balancing
Language
English
asked 4 years ago2.5K views
1 Answer
0

You may be experiencing a ramp up so fast the ALB is not scaling fast enough. Look at the following metrics:

ActiveConnectionCount
NewConnectionCount
RejectedConnectionCount

If you are using a Classic Load Balancer, Look at the following metrics:

RequestCount
SpilloverCount
SurgeQueueLength

If you see that you are not scaling fast enough, you can work with support to "pre-warm" the load balancers by filing a support ticket.

AWS
answered 4 years ago
AWS
EXPERT
reviewed 4 years ago

You are not logged in. Log in to post an answer.

A good answer clearly answers the question and provides constructive feedback and encourages professional growth in the question asker.

Relevant content