当发生类似这样的事情时:UnknownHostExceptionCaused by: java.lang.ClassCastException: java.net.UnknownHostException cannot be cast to com.netflix.zuul.exception.ZuulExceptionorg.springframework.cloud.netflix.zuul.
我想使用Eureka服务器通过Zuul网关运行多个并发请求。Caused by: com.netflix.hystrix.exception.HystrixRuntimeException: YYYYY could not acquire a semaphore for execution and no fallback available.
Caused by: java.lang.RuntimeException: could not acquire a semaphore for exec