Which logs would most likely help you troubleshoot issues related to user sessions in a web service?

Web application logs are essential for troubleshooting issues related to user sessions in a web service. These logs typically provide detailed information about user interactions with the application, including login attempts, session initiation and termination, and any errors encountered during the session lifecycle. By analyzing web application logs, you can track the flow of user sessions and identify points of failure or unexpected behavior that could affect user experience.

For instance, if a user is experiencing login problems, web application logs can show whether the session was created successfully, details about the user's requests, and any error messages that might indicate what went wrong. This level of granularity is critical when addressing session-related issues, as it helps pinpoint specific actions or events in the application that could have caused the problem.

In contrast, error logs typically capture error messages and exceptions occurring within the application but do not provide the same level of context about user sessions. System logs usually focus on hardware and operating system events rather than application-specific issues. Transaction logs, while useful for tracking data changes and integrity within an application, are less likely to offer insights into user session management and interaction. Therefore, web application logs are the most relevant in this context.