Troubleshooting Spring Boot MongoDB Connection Credential Issues
Connecting your Spring Boot application to a MongoDB database with credentials can sometimes be tricky. This article will explore common pitfalls and provide solutions based on real-world examples from Stack Overflow. We'll dive into a scenario where a Spring Boot application fails to connect to a MongoDB database due to authentication issues, even with the correct credentials specified.
The Problem:
A developer using Spring Boot 1.3.6, Spring 4.3.1, and MongoDB 3.2.7 encountered an error when connecting to a MongoDB database with a specific user account. They provided the correct database name and credentials in their application.properties file but received an authorization error. The application attempted to access the default "test" database instead of the intended database "NEWTest."
Analysis:
The issue stems from how Spring Boot handles MongoDB connections. Spring Boot's default behavior prioritizes connection to the default database "test," unless explicitly overridden. This is where the developer's application.properties configuration fell short.
Solution:
The key to resolving this issue is to explicitly specify the database name in the spring.data.mongodb.uri property. Instead of just providing the connection string, the database name should be included after the hostname and port.
Example:
# spring.data.mongodb.uri=mongodb://UserAdminNew:Dhara123@localhost:27017/NEWTest
spring.data.mongodb.uri=mongodb://UserAdminNew:Dhara123@localhost:27017/NEWTest
Explanation:
By including "/NEWTest" after the connection details, we tell Spring Boot to connect to the "NEWTest" database directly, bypassing the default "test" database.
Additional Considerations:
- Authentication: The user account used for authentication must have appropriate read/write privileges on the targeted database. In this case, the user "UserAdminNew" is granted read/write privileges on the "NEWTest" database.
- Driver Version: Ensure your MongoDB driver version (typically provided by the Spring Data MongoDB dependency) is compatible with the MongoDB server version.
- Firewall: If a firewall is present, it needs to be configured to allow access to the MongoDB server on the specified port.
Conclusion:
By explicitly specifying the database name in the spring.data.mongodb.uri property, Spring Boot applications can connect to the desired database, even when using custom credentials. This prevents potential authentication errors and ensures seamless communication with your MongoDB database.
Attribution:
This article is based on a Stack Overflow question posted by [user name](link to Stack Overflow question). We've used the original content and code snippets to provide a detailed explanation and practical solution for resolving MongoDB connection credential issues in Spring Boot applications.
Further Learning:
