spring cloud远程调用时错误提示：java.net.UnknownHostException

调试spring cloud时 报错信息如下：
2019-05-19 19:38:32.966 ERROR 13012 — [nio-9001-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.client.ResourceAccessException: I/O error on GET request for “http://eureka-provider/”: zy139.cn; nested exception is java.net.UnknownHostException: zy139.cn] with root cause

java.net.UnknownHostException: zy139.cn
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) ~[na:1.8.0_131]
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928) ~[na:1.8.0_131]
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323) ~[na:1.8.0_131]
at java.net.InetAddress.getAllByName0(InetAddress.java:1276) ~[na:1.8.0_131]
at java.net.InetAddress.getAllByName(InetAddress.java:1192) ~[na:1.8.0_131]
at java.net.InetAddress.getAllByName(InetAddress.java:1126) ~[na:1.8.0_131]

解决办法：
在etc/hosts文件中加入ip与域名映射，如：
39.98.XX.XXX zy139.cn