Spring Boot is a popular framework for building Java-based applications, and it offers a lot of convenience when it comes to working with databases. However, sometimes you may encounter an error message that says “Cannot determine embedded database driver class for database type NONE.” This can be a frustrating problem to solve, but with the right information, you can fix it quickly.
Root Cause
The root cause of this error message is that Spring Boot is unable to determine which embedded database driver class to use for your application. This can happen for a few different reasons, but the most common cause is that you have not specified a database type in your application’s configuration.
Solution 1
To fix this problem, you will need to specify a database type in your application’s configuration. This can be done by adding the following property to your application.properties or application.yml file:
Copy codespring.datasource.type=org.hsqldb.jdbcDriver
The value of this property should be set to the fully-qualified class name of the embedded database driver class that you want to use. For example, if you want to use HSQLDB as your embedded database, you would set the value of this property to “org.hsqldb.jdbcDriver.”
Solution 2
Alternatively, you can also use a dependency management tool like maven or gradle to manage your dependencies and include the required driver dependency.
Copy code<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
It’s also important to check if you have the correct database url, username and password defined.
Copy codespring.datasource.url=jdbc:h2:mem:testdb
spring.datasource.username=sa
spring.datasource.password=
Solution 3
Another possible cause of this error message is that you have multiple embedded database driver classes on your classpath. This can happen if you have multiple dependencies that include different embedded database driver classes. To fix this problem, you will need to remove the unnecessary dependencies from your classpath.
In addition to these causes, it’s also important to check that you have the correct version of the driver for the database. You can check the version of the driver you are using by checking the version of the jar file in the classpath.
Solution 4
Another potential cause of this error message is that the embedded database driver class is not on the classpath of your application. This can happen if you have not included the correct dependencies in your build configuration. Make sure you have added the correct dependencies for the embedded database you are using in your build tool, whether it’s Maven or Gradle.
For example, if you are using H2 as your embedded database, you would need to include the following dependency in your build configuration:
Copy code<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
It’s also important to ensure that you have the correct version of the driver for the database. You can check the version of the driver you are using by checking the version of the jar file in the classpath.
Solution 5
Another possible cause of this error message is that you have not configured the embedded database correctly. This can happen if you have not set the appropriate properties in your application’s configuration file. Make sure you have set the following properties correctly:
Copy codespring.datasource.url=jdbc:h2:mem:testdb
spring.datasource.username=sa
spring.datasource.password=
It’s also worth noting that this error message can occur if you are using a non-embedded database, such as MySQL or PostgreSQL. In this case, you will need to make sure that you have the correct driver for your database and that you have set the appropriate properties in your application’s configuration file.
Solution 6
If you are still experiencing this issue after trying all of the above solutions, it might be worth checking your logs for more information. Sometimes, the logs can provide more detailed information about the cause of the problem and can help you to identify the root cause.
Conclusion
In summary, the error message “Cannot determine embedded database driver class for database type NONE” in Spring Boot can be caused by a variety of issues, but the most common cause is that you have not specified a database type in your application’s configuration. By specifying a database type, including the correct dependencies, configuring the embedded database correctly and checking logs, you can fix this problem and get your Spring Boot application up and running again.