问题
I have a web application which is using Spring Boot to handle the backend logics. I'm trying to integrate mongodb to track some information about the users of this webapp. I created a database on mongodb Atlas and through the Mongo Shell the connection goes fine. The problem comes when I try to connect with Spring. Let me show you all the details
Inside Atlas, I added this IP Address (0.0.0.0/0 (includes your current IP address)) into Security > Network Address. In theory this should allow me to connect to the database from any IP address.
I then created a collection called "test".
If I click on my cluster and then on the connect button, it ask me with which modality I want to connect. I choose "Connect your application", and then I have to select the Driver and the Version. I choose respectively "Java" and "3.6 or later" (I'm not sure if it's the correct version, the alternatives are 3.4 or 3.3). And finally it shows me the connection string which is:
mongodb+srv://admin:<password>@umadit-obxpb.mongodb.net/test?retryWrites=true&w=majority
To connect to Atlas with Spring I'm using this dependency
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
</dependency>
Inside the application.properties file I have these two lines to configure mongo.
spring.data.mongodb.host=mongodb+srv://admin:<password>@umadit-obxpb.mongodb.net/test?retryWrites=true&w=majority
spring.data.mongodb.port=27017
Instead of the password I put for obvious reasons.
The only problem is that when I start Spring Boot I continue to receive this error message:
2020-02-25 16:31:25.605 INFO 41162 --- [=majority:27017] org.mongodb.driver.cluster : Exception in monitor thread while connecting to server mongodb+srv://admin:<password>@umadit-obxpb.mongodb.net/test?retrywrites=true&w=majority:27017
com.mongodb.MongoSocketException: mongodb+srv://admin:<password>@umadit-obxpb.mongodb.net/test?retrywrites=true&w=majority: nodename nor servname provided, or not known
at com.mongodb.ServerAddress.getSocketAddress(ServerAddress.java:188) ~[mongo-java-driver-3.6.4.jar:na]
at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:59) ~[mongo-java-driver-3.6.4.jar:na]
at com.mongodb.connection.SocketStream.open(SocketStream.java:57) ~[mongo-java-driver-3.6.4.jar:na]
at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:126) ~[mongo-java-driver-3.6.4.jar:na]
at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:114) ~[mongo-java-driver-3.6.4.jar:na]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_111]
Caused by: java.net.UnknownHostException: mongodb+srv://admin:<password>@umadit-obxpb.mongodb.net/test?retrywrites=true&w=majority: nodename nor servname provided, or not known
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method) ~[na:1.8.0_111]
at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928) ~[na:1.8.0_111]
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323) ~[na:1.8.0_111]
at java.net.InetAddress.getAllByName0(InetAddress.java:1276) ~[na:1.8.0_111]
at java.net.InetAddress.getAllByName(InetAddress.java:1192) ~[na:1.8.0_111]
at java.net.InetAddress.getAllByName(InetAddress.java:1126) ~[na:1.8.0_111]
at java.net.InetAddress.getByName(InetAddress.java:1076) ~[na:1.8.0_111]
at com.mongodb.ServerAddress.getSocketAddress(ServerAddress.java:186) ~[mongo-java-driver-3.6.4.jar:na]
... 5 common frames omitted
I don't know what to do in order to make it work. Am I missing something?
SOLUTION
As @barrypicker suggested, the problem was inside the properties file. Instead of using spring.data.mongodb.host I used spring.data.mongodb.uri. Now it works perfectly.
spring.data.mongodb.uri=mongodb+srv://admin:<password>@umadit-obxpb.mongodb.net/test?retryWrites=true&w=majority
even without spring.data.mongodb.port
来源：https://stackoverflow.com/questions/60398285/how-to-connect-mongodb-atlas-to-spring