[SOLVED] issue Cannot execute request on any known server

encounter following issue:

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
	at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111) ~[eureka-client-1.4.10.jar:1.4.10]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) ~[eureka-client-1.4.10.jar:1.4.10]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) ~[eureka-client-1.4.10.jar:1.4.10]
	at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) ~[eureka-client-1.4.10.jar:1.4.10]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) ~[eureka-client-1.4.10.jar:1.4.10]
	at com.netflix.discovery.DiscoveryClient.getAndStoreFullRegistry(DiscoveryClient.java:1030) [eureka-client-1.4.10.jar:1.4.10]
	at com.netflix.discovery.DiscoveryClient.fetchRegistry(DiscoveryClient.java:944) [eureka-client-1.4.10.jar:1.4.10]
	at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:444) [eureka-client-1.4.10.jar:1.4.10]
	at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:304) [eureka-client-1.4.10.jar:1.4.10]

Solution:

The root cause is: there is no server where the client can register on. 
After making a server, this issue is gone.