The system prompts "connection attempt failed" when logging on to apsaradb for MongoDB through the Mongo Shell from a Linux instance - ApsaraDB for MongoDB

Problem description

When you log on to a MongoDB database from a Linux instance by using the Mongo Shell, the following error message is displayed.

MongoDB shell version: 3.2.3
DB Prefix:
connecting to: 10.X.X.8:3717/admin
2016-05-31T15:25:58.940+0800 W NETWORK  Failed to connect to 10. *. *.8:3717 after 5000 milliseconds, giving up.
2016-05-31T15:25:58.943+0800 E QUERY    Error: couldn't connect to server 10. *. *.8:3717 (10.X.X.8), connection attempt failed
    at connect (src/mongo/shell/mongo.js:181:14)
    at (connect):1:6 at src/mongo/shell/mongo.js:181
exception: connect failed

Cause

POSSIBLE CAUSES:

The Linux instance and the apsaradb for MongoDB instance do not belong to the same VPC.
The network types of the Linux instance and the apsaradb for MongoDB instance are different.

Solution

Choose one of the following methods to fix the issue based on-site conditions:
- Change the network type of the apsaradb for MongoDB instance to classic network and then switch back to VPC.
  Note
  Instructions select the same VPC as the Linux instance.
- The network types of a Linux instance and an apsaradb for MongoDB instance are different. For more information, see how to connect an ECS instance to an apsaradb for MongoDB instance when their network types are different.
Log on to the Linux instance and run the following command to check whether the network connection between the Linux instance and the apsaradb for MongoDB instance is normal:
```
telnet dds-ali12XXXXX.mongodb.rds.aliyuncs.com 3717
```
Note
Instructions the port of an apsaradb for MongoDB instance is 3717.
A similar output is displayed. Confirm that the domain name is resolved and that Port 3717 can communicate properly.

Documentation

Application scope

ApsaraDB for MongoDB