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An ecommerce company is using an AWS Lambda function behind Amazon API Gateway as its application tier. To process orders during checkout, the application calls a POST API from the frontend. The POST API invokes the Lambda function asynchronously. In rare situations, the application has not processed orders. The Lambda application logs show no errors or failures.
What should a developer do to solve this problem?
Suggested Answer: B
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16 comments · newest first
ES
Estrella
11 months ago
Definitely check CloudWatch logs, you might find something there.
DO
Dolores
12 months ago
Wait, why would caching affect the POST API? That sounds odd.
EL
Elly
12 months ago
Not sure about that, wouldn’t inspecting the frontend logs help too?
TE
Teresita
1 year ago
Agree, B seems like the best option here.
GL
Gladis
1 year ago
I think checking the Lambda dead-letter queue is a good start.
KA
Kayleigh
1 year ago
I’m a bit confused about caching in API Gateway. I don’t recall it being a common issue for POST requests, so I’m not sure if option D is relevant here.
JO
Joye
1 year ago
I feel like we practiced a question similar to this where inspecting CloudWatch logs was key. Maybe option C is the right approach?
IE
Iesha
1 year ago
I think option B sounds familiar. Dead-letter queues can help with troubleshooting, but I’m not entirely sure how to set it up properly.
LI
Lilli
1 year ago
I remember we discussed the importance of checking logs, but I'm not sure if inspecting the frontend logs would help in this case since the Lambda logs show no errors.
MI
Michell
1 year ago
I vaguely recall something about caching in API Gateway. Disabling it could be relevant, but I'm not convinced it would solve the order processing issue directly.
CO
Corazon
1 year ago
I feel like we practiced a similar question where we had to check CloudWatch logs. It seems logical to look there for any hidden errors in the Lambda function.
FR
Frederica
1 year ago
I'm not entirely sure, but I think inspecting the frontend logs could be useful. If there were any API failures, that might explain why orders aren't processing.
MI
Mireya
1 year ago
I remember we discussed the importance of checking the dead-letter queue for Lambda functions. It might help identify if there were any unprocessed events.
BR
Britt
1 year ago
Hmm, this seems like a tricky one. I'll need to think carefully about the role of internal auditors and how that might impact the independent auditor's procedures.
SC
Scarlet
1 year ago
This question is testing our understanding of zone management and shared storage. I'll need to think through the implications of each option carefully.
KE
Kenneth
1 year ago
Hmm, I'm not sure about this one. I'll need to review my notes on the rsync command and make sure I understand the syntax correctly before selecting an answer.