[INFO ] Exception in monitor thread while connecting to server 127.0.0.1:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
at com.mongodb.connection.SocketStream.open(SocketStream.java:62) ~[mongo-java-driver-3.5.0.jar:na]
at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:107) ~[mongo-java-driver-3.5.0.jar:na]
at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:111) ~[mongo-java-driver-3.5.0.jar:na]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_161]
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_161]
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85) ~[na:1.8.0_161]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_161]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_161]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_161]
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) ~[na:1.8.0_161]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_161]
at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_161]
at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:59) ~[mongo-java-driver-3.5.0.jar:na]
at com.mongodb.connection.SocketStream.open(SocketStream.java:57) ~[mongo-java-driver-3.5.0.jar:na]
... 3 common frames omitted

这个网上查找是说是springboot导致，但是项目没有用到springboot