👉 Hystrix is a programming construct that refers to a method of testing an asynchronous operation. It was introduced by the Hystrix API, which is used for testing the performance and reliability of services in web applications. In this context, "hystrix" refers to the term that describes a mechanism or system where two or more functions are executed concurrently but with unpredictable outcomes. The term is commonly used to describe how a service can fail due to unexpected conditions during execution. This failure can be caused