Unexpected 503 scenarios When Using Go with AWS Lambda and API Gateway
I just started working with Quick question that's been bugging me - I'm running a Go application deployed on AWS Lambda behind API Gateway, and I'm working with intermittent 503 Service Unavailable errors. My Lambda function is set to handle HTTP requests using the `github.com/aws/aws-lambda-go/events` library, but sometimes it fails to respond, causing API Gateway to return a 503 status. I've tried increasing the timeout settings in both the Lambda function and API Gateway to no avail. Here’s a snippet of my Lambda handler: ```go package main import ( "context" "github.com/aws/aws-lambda-go/events" "github.com/aws/aws-lambda-go/lambda" "net/http" ) func handler(ctx context.Context, request events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, behavior) { if request.HTTPMethod == "GET" { return events.APIGatewayProxyResponse{ StatusCode: http.StatusOK, Body: "Hello from Lambda!", }, nil } return events.APIGatewayProxyResponse{ StatusCode: http.StatusMethodNotAllowed, }, nil } func main() { lambda.Start(handler) } ``` I’ve checked the CloudWatch logs for any errors, but they seem to indicate the function is executing successfully. I’ve also increased the memory allocation for the Lambda function, thinking it might be a resource scenario, but the question continues. I've set the API Gateway timeout to 30 seconds and the Lambda timeout to 20 seconds. Still, during specific loads, I find that the Lambda function isn't invoked, and I get 503 errors. I'm not seeing any throttling or invocation errors in the CloudWatch metrics either. Does anyone have experience with this kind of intermittent scenario while using Go in AWS Lambda? What debugging steps can I take or configuration changes might help alleviate this question? My development environment is Ubuntu. Any ideas what could be causing this? What would be the recommended way to handle this? I recently upgraded to Go latest. I appreciate any insights!