Real-time Scenario

Troubleshoot your AWS Lambda Issues, Steps:

What happens in Lambda? AWS lambda triggers whatever it’s talking about either could be Cron based or, it could be Event based.
In AWS EventBridge, there are multiple triggers. You need to make sure whether the proper trigger has been assigned to the lambda function. Otherwise, it will not trigger On-time.
Go to EventBridge > Events > Check Rules > EC2 instance tagged Lambda > Check EventBridge (CloudWatch Events)
Make sure your Lambda has been properly mapped with the correct EventBridge

Check the respective EventBridge to see whether it is properly configured. Sometimes it would be wrongly configured with the JSON values. So that it should be validated.
Go to EventBridge rules > Event pattern > Check “source”, “detail-type”: [“AWS API call via CloudTrail”], “detail”, “eventSource”, “eventName”: [“RunInstances”]. Lambda trigger runs based on a new agent created in CloudTrail.
Go to check CloudTrail > Event history > search bye ‘Event name’, ‘RunInstances’
If required the edit the Event Pattern

Check lambda_handler has been collecting data from the CloudTrail instance_id or NOT; because, sometimes, it takes code from Local source code
If it is taking from Local then make sure there is NO Errors
Now, Test Lambda function just to make sure NO Errors.

go to Lambda Function > view logs in CloudWatch > Logs > Log groups > Log Streams
Check each log streams whether any Error or not

Go to lambda > Configuration > Check Triggers, Permissions, Destinations, Func URL, Env variables, Tags, VPC, Monitoring, Concurrency, invocation, code signing, database proxies

Name		Name	Last commit message	Last commit date
Latest commit History 4 Commits
Check & Test Lambda functions.PNG		Check & Test Lambda functions.PNG
Check CloudWatch Logs.PNG		Check CloudWatch Logs.PNG
Check Env.PNG		Check Env.PNG
Check Event Pattern.PNG		Check Event Pattern.PNG
Check Event type.PNG		Check Event type.PNG
Check EventBridge.PNG		Check EventBridge.PNG
Check Log Streams.PNG		Check Log Streams.PNG
Check data event type.PNG		Check data event type.PNG
Check lambda Handler.PNG		Check lambda Handler.PNG
Check lambda configuration.PNG		Check lambda configuration.PNG
Check role in permission.PNG		Check role in permission.PNG
Create CloudTrail Trail with API Insights.PNG		Create CloudTrail Trail with API Insights.PNG
LICENSE		LICENSE
New Text Document.txt		New Text Document.txt
README.md		README.md