How do you diagnose and troubleshoot issues in the system?

Troubleshooting and resolving issues in a system typically involves the following steps:

1. Information gathering: studying logs, metrics, system status, and user-reported problems.
2. Reproducing the problem: attempting to reproduce the error in a controlled environment.
3. Analysis: identifying possible causes based on collected data.
4. Hypothesis testing: verifying assumptions using monitoring tools, debuggers, and additional logs.
5. Fixing: making changes to configuration, code, or infrastructure.
6. Verification: confirming that the problem is resolved and the system operates correctly.
7. Documentation: recording causes and solutions for future reference.

For example, if a service stops responding, logs and server load are checked first, then dependencies' status is examined, and finally, the service may be restarted or resources increased.