Spring Boot使用Feign客户端调用远程服务时出现：timed-out and no fallback available，failed and no fallback available的

是熔断器超时导致的，可以修改yml,如下

hystrix:
    command:
        default:
            circuitBreaker:
                sleepWindowInMilliseconds: 100000
                forceClosed: true
            execution:
                isolation:
                    thread:
                        timeoutInMilliseconds: 60000
    shareSecurityContext: true