Jaeger
Jaeger is an open-source, end-to-end distributed tracing system for monitoring and troubleshooting microservices-based architectures. It helps developers understand the flow of requests across services by collecting timing data and visualizing latency and dependencies. Originally developed by Uber and now part of the Cloud Native Computing Foundation (CNCF), it is commonly used with cloud-native applications.
Developers should learn Jaeger when building or maintaining distributed systems, especially microservices, to diagnose performance issues, identify bottlenecks, and debug complex request flows. It is essential for observability in modern applications, enabling teams to trace requests across multiple services, which is critical for maintaining reliability and performance in production environments.