Debugging common issues and solutions in microservices testing

When testing microservices, especially in a distributed environment, debugging can quickly become complex due to inter-service communication, asynchronous processes, and potential failures across multiple components that are difficult to trace. The good news is that NestJS provides powerful features and tools to help resolve these issues systematically and efficiently. In this section, we will walk through some common issues and present sophisticated techniques to debug them in a scalable way.

Issue 1 – microservices failing to connect

A common issue in microservices is connection failure between services. This can be caused by the following:

• Incorrect port configurations
• Unreachable network endpoints
• Mismatched service names

Let’s simulate and troubleshoot this issue step by step.

To reproduce this issue, follow these steps:

1. Start your microservices ensuring they are...