Every HTTP requests to APIs created in API Gateway is returning back EOF: Error.Why?

Question

I am sending few HTTP requests GET/POST/DELETE to few APIs created in AWS API Gateway. I am getting EOF:Error and it's not triggering the logs  as well.For example below is some log statements from the Lambda which is triggering these HTTP requests;

Get "https://cj41dl5igj.execute-api.ap-southeast-1.amazonaws.com/v1/IntegrationServices/Application/GetMessageThread/150FA9C6-D6F1-4EEC-9B8F-41FE753F8ECE?SystemClient=6d9320a0-da2a-4802-ba15-4f49842ed7a3": EOF

Get "https://cj41dl5igj.execute-api.ap-southeast-1.amazonaws.com/v1/IntegrationServices/Application/GetMessageThread/150FA9C6-D6F1-4EEC-9B8F-41FE753F8ECE?SystemClient=6d9320a0-da2a-4802-ba15-4f49842ed7a3": EOF: Error
null

END RequestId: ec3194b2-e680-441f-9152-5936f309d737
REPORT RequestId: ec3194b2-e680-441f-9152-5936f309d737	Duration: 19.45 ms	Billed Duration: 20 ms	Memory Size: 512 MB	Max Memory Used: 29 MB	Init Duration: 91.66 ms

Get "https://cj41dl5igj.execute-api.ap-southeast-1.amazonaws.com/v1/IntegrationServices/Application/GetMessageThread/150FA9C6-D6F1-4EEC-9B8F-41FE753F8ECE?SystemClient=6d9320a0-da2a-4802-ba15-4f49842ed7a3": EOF

Answer

What is the backend for your APIs? Have you tested the backend directly (without going through API Gateway) and do they work fine? If your backend is a lambda function and it gives you the same error when run directly, then try increasing the memory allocated to the lambda function

If the backend endpoints all work fine, then I would test locally from the API Gateway AWS console next.

Every HTTP requests to APIs created in API Gateway is returning back EOF: Error.Why?

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