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 （要检查 eureka -server 而不是 client）
eureka:
instance:
hostname: localhost