As applications become distributed, the probability of failures increases. How does the application react in the case of localized failures or disruptions? Can it provide basic operations without completely crashing?

This behavior of an application to provide the bare minimum service levels in case of unexpected failures is called resilience.

As more and more applications move towards the Cloud, the resilience of applications becomes important.

We will discuss building highly resilient microservices using Spring Cloud and Spring Data Flow in Chapter 9, Spring Cloud and Chapter 10, Spring Cloud Data Flow.