DOP-C02 Question 324
Select 3Your organization runs a mission-critical application on an Amazon ECS cluster with services using the Fargate launch type. Recently, you received multiple alerts indicating that one of the services is intermittently failing to respond to requests. The logs show increased error rates but no clear root cause. What steps should you take to identify and troubleshoot the issue?
- A
Enable Amazon ECS Service Auto Scaling and observe if the issue resolves.
- B
Use AWS CloudWatch Logs Insights to analyze the application logs for patterns or errors.
- C
Verify the resource limits (CPU and memory) configured for the Fargate tasks and compare them with the application's observed usage.
- D
Use AWS X-Ray to trace requests through the application and identify bottlenecks or failures.
- E
Restart the ECS service to clear any potential transient issues.
Show answer and explanation
Correct answers: B, C, D
Explanation
To troubleshoot system and application failures in an Amazon ECS-based application, it is important to analyze logs for patterns or errors, verify resource configurations, and use tracing tools like AWS X-Ray to identify bottlenecks or failures. These steps help identify the root cause of the issue rather than applying temporary fixes or assuming scaling will resolve the problem.
- A. Incorrect.
Enabling ECS Service Auto Scaling might help with scaling issues, but it does not directly address troubleshooting. Without understanding the root cause, scaling may not resolve the intermittent failures.
- B. Correct.
Analyzing application logs with CloudWatch Logs Insights can help identify patterns, errors, or exceptions that might be causing the failures, making it an essential step in troubleshooting.
- C. Correct.
Verifying resource limits and comparing them with observed usage is crucial to determine if the tasks are running out of CPU or memory, which could lead to intermittent failures.
- D. Correct.
Using AWS X-Ray can help trace requests and identify specific bottlenecks or points of failure in the application, making it a critical tool for troubleshooting.
- E. Incorrect.
Restarting the ECS service might temporarily resolve the issue if it is transient, but it does not help identify or troubleshoot the root cause of the problem.