This solution provides an event-driven architecture with minimal operational overhead, directly addressing the question's requirements. Using Amazon S3 event notifications to trigger an Amazon EventBridge rule is an efficient replacement for the polling mechanism. EventBridge can then directly invoke an Amazon ECS task. Choosing the AWS Fargate launch type for ECS makes the compute layer serverless, eliminating the need to manage underlying EC2 instances. Fargate tasks can run for much longer than the required 25 minutes, making it a suitable choice for the long-running processing job. This combination optimizes the workflow and significantly reduces operational burdens.

B: AWS Lambda functions have a maximum execution timeout of 15 minutes. This is insufficient for the processing job that can take up to 25 minutes, causing it to fail. C: An AWS Glue crawler is designed to discover data schemas and populate the AWS Glue Data Catalog, not to act as a real-time application trigger. This is an incorrect use of the service. D: This option is incorrect for the same reason as option B. Deploying the container to AWS Lambda is not viable due to the 15-minute execution timeout limit, which is less than the 25-minute processing time.

1. AWS Lambda Quotas: The official AWS Lambda documentation states the maximum execution duration for a function.

Source: AWS Lambda Developer Guide

"Lambda quotas".

Reference: In the "Function configuration

deployment

and execution quotas" table

the "Timeout" resource has a maximum value of 900 seconds (15 minutes).

2. Invoking ECS Tasks from S3 Events: The AWS documentation outlines the event-driven pattern of using S3 events with EventBridge to start an ECS task

which is ideal for this scenario.

Source: AWS Compute Blog

"Introducing Amazon EventBridge integration for Amazon ECS".

Reference: The blog post details how "Amazon ECS is now a target for Amazon EventBridge

" allowing you to "run Amazon ECS tasks on a schedule

or in response to any EventBridge event." This includes S3 object creation events.

3. AWS Fargate for Long-Running Tasks: Fargate is a serverless compute engine suitable for containerized applications

including batch jobs that run longer than the Lambda timeout.

Source: AWS Fargate FAQs.

Reference: The FAQ page clarifies that Fargate is suitable for "batch workloads... that run for a short period of time

" which can be minutes or hours

thus easily accommodating the 25-minute requirement without the operational overhead of managing servers.

4. Purpose of AWS Glue Crawlers: The AWS Glue documentation specifies the intended use of crawlers

which does not align with triggering application logic.

Source: AWS Glue Developer Guide

"Defining Crawlers".

Reference: The guide states

"You use a crawler to populate the AWS Glue Data Catalog with tables. This is the primary method used by most AWS Glue users." This confirms its purpose is metadata discovery

not event-based invocation.