Research on health monitoring mechanism based on service invocation

During the process of service discovery in Eureka, the status information in the service registry can't be updated in time once the registration was successful, and some services with fault were invoked by the client because they were indistinguishable in the registry, resulting in a reduction in the success rate of the service invocation. Aim to solve the problems, this article added the health monitoring about the result of service invocation based on the health checks in Eureka, then the results fed back to the service registry to update the health status of the service instance, which guaranteed the success rate of follow-up service invocation, and enhanced the stability of the service through improvement of health monitoring.