Elastic Beanstalk 504 Gateway Errors

Asked Apr 23 '20 at 02:14

Active Apr 23 '20 at 02:14

Viewed 673 times

I'm running a simple "hello world" application that runs fine in local development (run with "eb local run"). When I tried deploying to elasticbeanstalk, 20% of requests resolve as 504 Gateway Timeout. The load balancer sends a request to an instance an an instance never seems to receive the request.

How do you diagnose this? The logs simply say the load balancer initiated a request and the instance never seemed to hear about it.

Thank you!

asked Apr 23 '20 at 02:14

Test

Security groups for the instance allow connections from the ELB? – Marcin Apr 23 '20 at 02:36
1

Yes, 80% of requests are fine. Randomly, 20% fail and interestingly they seem to fail more often when coming from curl as opposed to chrome – Test Apr 23 '20 at 02:43
Are these requests same for chrome and curl: like same port, same protocl (http, https), paths ...? – Marcin Apr 23 '20 at 02:44
Yes, I've tried https and http, both have the same X% randomly failing. – Test Apr 23 '20 at 02:45
You have only 1 instance? Not, e.g. 5, in autoscaling group. Four could be unhealthy but your ELB does not recognize that? – Marcin Apr 23 '20 at 02:47
Only 1. ELB has the option to scale but it hasn't – Test Apr 23 '20 at 03:11
What does the cpu/mem utilization look like on the instance? – Ali Apr 23 '20 at 03:15

Elastic Beanstalk 504 Gateway Errors

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