AWS Certified Developer Associate DVA-C02 Practice Question
A developer is troubleshooting an application that intermittently fails to connect to an Amazon RDS database instance. The logs indicate occasional connection timeouts. The application and database have not been modified recently, and there is no predictable pattern for the timeout occurrences. After ensuring there are no network issues and the database is healthy, what should the developer investigate NEXT to identify the root cause?
Enable AWS X-Ray tracing for in-depth analysis of the underlying Lambda function's execution flow.
Review the application's usage of Amazon SQS to check for any unprocessed messages accumulating in a dead-letter queue.
Analyze the application's interaction with the Amazon EC2 instance to gauge the processing time of web requests.
Inspect the number of database connections and ensure proper management in the application's connection pooling configuration.
Profile the application code to identify any performance bottlenecks that could cause delays.
Check for any misconfigured request headers impacting CloudFront distributions, assuming it serves content to the application.
When experiencing intermittent connection timeouts to an RDS database that is otherwise healthy and without network issues, it is important to check the number of database connections. RDS instances have a limit on the number of concurrent connections they can handle. If an application sporadically opens too many connections, it might hit this limit, leading to connection timeouts. Inspecting the connection patterns and pool management in the application code or configuration is the next logical step to identifying the issue. Other provided incorrect options are either less related to the symptoms described (such as inspecting SQS for dead-letter queues or reviewing CloudFront distributions when there's no mention of these services being part of the issue) or are too broad and do not specifically address the intermittent connection timeouts (like general code profiling that does not focus on the connections).
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AWS Certified Developer Associate DVA-C02
Troubleshooting and Optimization
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