aws sqs lambda：消息不再出现

Question

I have followed standard aws lambda creation with sqs trigger. Then I sent message to sqs queue which then kicks lambda, which in turn writes to stdout. All good.

The issue is: I have not yet deleted receipt of the message and I expect the message to appear again for processing after the visibility period of 60 seconds(default). This is not happening, wonder why.

package main

import (
    "context"
    "fmt"
    "github.com/aws/aws-lambda-go/events"
    "github.com/aws/aws-lambda-go/lambda"
)

func handler(ctx context.Context, sqsEvent events.SQSEvent) error {

    for _, message := range sqsEvent.Records {
        fmt.Println("Id", message.MessageId)
        fmt.Println("Source", message.EventSource)
        fmt.Println("Body", message.Body)
    }

    return nil
}

func main() {
    lambda.Start(handler)
}

Answer 1

Making an answer out of the conversation with the OP

Question: Op wants to check how SQS retries sending events to lambda when events fail. Op provides the code for a lambda function written in Go

Problem: Provided lambda does not fail so no retry behavior happens.

Solution: Rewrite lambda so it always fail.

    func handler(ctx context.Context, sqsEvent events.SQSEvent) error {

    for _, message := range sqsEvent.Records {
        fmt.Println("Id", message.MessageId)
        fmt.Println("Source", message.EventSource)
        fmt.Println("Body", message.Body)
    }

    return error.New("Song by B.S.")
    }