Spring cloud eureka server 错误问题记录

1.报此错误:2017-06-07 09:02:44.308 ERROR 340 --- [et_localhost-19] c.n.e.cluster.ReplicationTaskProcessor : Batch update failure with HTTP status code 401; discarding 1 replication tasks

　　检查是否配置

eureka:
　　instance:
　　　　hostname: localhost