Resilience is the ability of an application to handle unexpected issues without failing. In Spring-based systems, building resilience means preparing your application to deal with errors, slow responses, and network problems gracefully. You will explore why resilience matters, what common challenges you might face, and how Spring can help you build robust, reliable applications that keep running even when things go wrong.

Resilience

Resilience means your application can keep working, even when things go wrong. In software, problems like network failures, slow services, or unexpected errors are common. A resilient system is designed to handle these issues without crashing or causing major disruptions.

In Spring applications, resilience is important because it helps your services stay available and reliable. Users expect fast, dependable responses. If your app fails every time an outside service is slow or unavailable, users will have a poor experience and may lose trust in your system.

Key concepts to understand include:

• System reliability: how often your application works as expected;
• Fault tolerance: the ability of your app to keep running, even when something breaks;
• Graceful degradation: providing a limited or reduced service instead of failing completely.

By applying resilience patterns in Spring, you make your applications stronger and better prepared for real-world problems.