AWS Golang Lambda handler function not getting called

Question

I have a Golang 1.18 program like:

    package main

    import (
        "fmt"

        "github.com/aws/aws-lambda-go/lambda"
    )

    func HandleRequest() error {
        fmt.Print("HandleRequest entered\n")
        return nil
    }

    func main() {
        fmt.Print("Starting HandleRequest\n")
        lambda.Start(HandleRequest)
    }

Which I've compiled in Linux, zip'ed up, and deployed to AWS Lambda with Go1.x runtime. When I "Test" my lambda via AWS UI, I see the Starting handleRequest print statement, but I don't see the handleRequest entered print startment. In the logs I see a line like Task timed out after 30.03 seconds.

I have no clue why it is timing out, or taking 30 seconds in order to start calling handleRequest. The handler function signature should be valid, according to https://docs.aws.amazon.com/lambda/latest/dg/golang-handler.html#golang-handler-signatures.

Any ideas? Thank you

The handleRequest function must be exported... that means it should be visible to the caller... you need to rename it to HandleRequest. docs.aws.amazon.com/lambda/latest/dg/… — Chetan
– Chetan, Commented Jun 7, 2022 at 2:06
@Chetan thanks but I tried and same result with a timeout. This is deployed in a VPC, but I am not accessing any resources, as shown in the code. — jordan
– jordan, Commented Jun 7, 2022 at 2:21

jordan · Accepted Answer · 2022-06-07 03:55:56Z

1

Turns out I needed an outbound security group rule to allow all traffic, although I dont know why (as I'm not making any outbound requests).

answered Jun 7, 2022 at 3:55

jordan

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