Testing Retry Behavior and DLQs in AWS Lambda

Dead-letter queues are useful for debugging your application or messaging system because they let you isolate problematic messages to determine why their processing doesn't succeed.

Prerequisite:
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AWS SQS | AWS Simple Queue Service | How SQS Works | AWS Tutorial
   • AWS SQS | AWS Simple Queue Service | ...  
AWS Lambda Destinations tutorial | Synchronous Vs Asynchronous Invocation
   • AWS Lambda Destinations tutorial |  S...  

Lambda Code:
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import json
import time

def lambda_handler(event, context):
TODO implement
print(event)
time.sleep(3)
return {
'statusCode': 200,
'body': json.dumps('Hello from Lambda!')
}


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