AWS API Gateway not able to call AWS Lambda function using JSON Array payload

Question

I have defined a resource/method in API Gateway to make a post call to Lambda Function which is a microservice exposing few endpoints.

Method: post

Payload:

[{"gts_user_id":2,"gts_role_id":2,"gts_user_role_is_primary":1}]

This call is not reaching the Lambda method. I am not able to see any logs. What may be the reasons?

Can you show a picture of the API GW Resources, show us the API GW POST pointing to the Lambda. Second are you using Velocity Apache - its the language used to do ETL's on incoming and outgoing JSON? Have you looked in Cloud Watch > Log Groups > /aws/lambda/user ? The Error will be there... — Jeremy Thompson
– Jeremy Thompson, Commented Jun 7, 2021 at 3:47
Thanks Jeremy for quick response. How to attach a picture? Please share your emailID, I will send the picture. I am using Springboot microservice. Inside Cloud Watch > Log Groups > /aws/lambda/IdentitityService, there is no log. It is working if I pass a plain JSON object and not an array. — Monoranjan Gorai
– Monoranjan Gorai, Commented Jun 7, 2021 at 4:37
I added the picture in google drive: drive.google.com/file/d/1ouCCZPipfWabGRTnrm4N4cWuF-x_gShj/… — Monoranjan Gorai
– Monoranjan Gorai, Commented Jun 7, 2021 at 5:13
I did remove the URL @MonoranjanGorai. It was broken and contained details. Furthermore, your picture that you linked is a Word document. — Jens
– Jens, Commented Jun 7, 2021 at 5:35
Here is my article on aws lambda and API gateway plz check - dzone.com/articles/aws-lambda-with-mysql-rds-and-api-gateway — vaquar khan
– vaquar khan, Commented Jun 7, 2021 at 6:34

Monoranjan Gorai · Accepted Answer · 2021-06-11 14:32:29Z

1

But after analyzing and exploring several options I found that there was policy error "The final policy size (20577) is bigger than the limit (20480)". I removed the triggers & recreated, then it started to work.

answered Jun 11, 2021 at 14:32

Monoranjan Gorai

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