How can the developer troubleshoot the failure?
Configure AWS CloudTrail logging to investigate the invocation failures.
Configure Dead Letter Queues by sending events to Amazon SQS for investigation.
Configure Amazon Simple Workflow Service to process any direct unprocessed events.
Configure AWS Config to process any direct unprocessed events.
Explanations:
AWS CloudTrail provides logging for API calls made within your AWS account but does not specifically log Lambda invocation failures in detail. It helps in auditing but does not offer insights into the reason for the failure.
Configuring Dead Letter Queues (DLQs) allows failed Lambda invocations to be sent to Amazon SQS or SNS for further investigation. This enables developers to analyze the events that caused the failure and take corrective action.
Amazon Simple Workflow Service (SWF) is not designed for processing unprocessed Lambda events. It is primarily used for coordinating work between distributed components. It does not handle failure retries for Lambda functions.
AWS Config tracks configuration changes in your AWS resources but does not provide functionality for processing or investigating unprocessed events from Lambda functions. It is not related to handling invocation failures directly.
I scheme that the answer is:
Configure Dead Letter Queues by sending events to Amazon SQS for investigation.