👀 Views: 85 💬 Answers: 1 📅 Created: 2025-06-02

aws lambda api-gateway nodejs JavaScript

I'm working with a '502 Bad Gateway' behavior when trying to invoke my AWS Lambda function through API Gateway. I've set up the Lambda function to handle requests from the API Gateway, but it seems like there's a communication scenario. My Lambda function is using Node.js 14.x and has the following basic structure: ```javascript exports.handler = async (event) => { console.log('Received event:', JSON.stringify(event, null, 2)); return { statusCode: 200, body: JSON.stringify('Hello from Lambda!') }; }; ``` I've configured the API Gateway with a Lambda proxy integration, and here are the relevant settings: - Method: POST - Lambda Function: myLambdaFunction - Deployment Stage: prod To troubleshoot, I've checked CloudWatch logs for both the API Gateway and the Lambda function. The API Gateway logs show that the request is reaching the Lambda, but the Lambda logs do not indicate any executions. The Lambda execution role has the necessary permissions, and I've ensured that the API Gateway is correctly set up to point to the right Lambda ARN. I've also tried the following: 1. Testing the Lambda function directly in the AWS console, which works perfectly. 2. Redeploying the API Gateway and clearing the cache. 3. Enabling detailed logging for the API Gateway to catch any hidden errors. I still receive the '502 Bad Gateway' behavior when I try to call the API Gateway URL. Could there be any misconfiguration in my API Gateway setup that I'm overlooking? Any help would be appreciated!