mongodb始终链接不上

Question

Mac OS 10.13.6 mongodb版本3.4 brew安装的, mongodb的服务也是通过brew正常启动的,开始的时候链接27017端口都很正常.但是,升级了jdk到1.8的版本后,怎么链接都是失败,如下图:

Connection failed.

SERVER [localhost:27017] (Type: UNKNOWN) 

|_/ Connection error (MongoSocketOpenException): Exception opening socket

|____/ Socket error: Connection refused (Connection refused)

Details:

Timed out after 5000 ms while waiting to connect. Client view of cluster state is {type=UNKNOWN, servers=[{address=localhost:27017, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketOpenException: Exception opening socket}, caused by {java.net.ConnectException: Connection refused (Connection refused)}}]

请问,哪位知道是什么原因引起的,告诉下,先谢谢啦.