Load balancer does not have available server for client

java.lang.RuntimeException: com.netflix.client.ClientException: Load balancer does not have available server for client: biz-dsys-shelf-service
	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_171]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_171]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.12.jar!/:9.0.12]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_171]
Caused by: com.netflix.client.ClientException: Load balancer does not have available server for client: biz-dsys-shelf-service
	at com.netflix.loadbalancer.LoadBalancerContext.getServerFromLoadBalancer(LoadBalancerContext.java:483) ~[ribbon-loadbalancer-2.3.0.jar!/:2.3.0]
	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:184) ~[ribbon-loadbalancer-2.3.0.jar!/:2.3.0]
	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:180) ~[ribbon-loadbalancer-2.3.0.jar!/:2.3.0]
	at rx.Observable.unsafeSubscribe(Observable.java:10327) ~[rxjava-1.3.8.jar!/:1.3.8]

原因 服务端将服务下线了,虽然通过ps -ef 可以查到服务的进程,但是在nocos中已经下线了.比较难受,找了好久这个原因