Spring boot mongodb autoconfigure throws exception "Cannot determine embedded database driver class for database type NONE" - spring

Question

I am using Spring boot to develop a Spring batch application. I will need my application to write the data finally to MongoDB and thus needs to configure org.springframework.data.mongodb.core.MongoTemplate for org.springframework.batch.item.data.MongoItemWriter.
My pom.xml dependency section looks like this-
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-batch</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.batch</groupId>
<artifactId>spring-batch-test</artifactId>
<version>${spring.batch.version}</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.18</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.jongo/jongo -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.jvnet.jaxb2_commons/jaxb2-basics-runtime -->
<dependency>
<groupId>org.jvnet.jaxb2_commons</groupId>
<artifactId>jaxb2-basics-runtime</artifactId>
<version>1.11.1</version>
</dependency>
<!--<dependency>-->
<!--<groupId>de.flapdoodle.embed</groupId>-->
<!--<artifactId>de.flapdoodle.embed.mongo</artifactId>-->
<!--<version>1.50.5</version>-->
<!--<scope>test</scope>-->
<!--</dependency>-->
<!--<dependency>-->
<!--<groupId>cz.jirutka.spring</groupId>-->
<!--<artifactId>embedmongo-spring</artifactId>-->
<!--<version>RELEASE</version>-->
<!--<scope>test</scope>-->
<!--</dependency>-->
<!-- https://mvnrepository.com/artifact/org.mongodb/mongo-java-driver -->
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongo-java-driver</artifactId>
<version>3.6.0</version>
</dependency>
</dependencies>
The application.properties file looks like this
spring.data.mongodb.host=mongohost
spring.data.mongodb.port=27017
spring.data.mongodb.authentication-database=authdb
spring.data.mongodb.username=user
spring.data.mongodb.password=pwd
spring.datasource.driver-class-name=<< I don't know what to put here >>
Main class is also simple enough and looks like this-
#SpringBootApplication
public class Main {
public static void main(String[] args) {
SpringApplication.run(Main.class, args);
}
}
Now, whenever I try to run my Main class it gives out error
***************************
APPLICATION FAILED TO START
***************************
Description:
Cannot determine embedded database driver class for database type NONE
Action:
If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (no profiles are currently active).
After researching a lot about this problem, I figured out that I need to let Spring know about my data store by providing the value of spring.datasource.driver-class-name in application.properties
spring.datasource.driver-class-name=com.mongodb.Server
If I provide com.mongodb.Server as my drive class name its not found on classpath and isn't recognised despite I have mongo java driver dependency on my classpath.
What should I put the value for mongoDB's driver-class-name provided I want to use mongo-java-driver?
If driver class name is not the cause of this issue, what should be the resolution of issue "Cannot determine embedded database driver class for database type NONE"mentioned in title of this question?

Answer 1

Try exluding DataSourceAutoConfiguration.class in your main class:
#SpringBootApplication
#EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
public class Main {
public static void main(String[] args) {
SpringApplication.run(Main.class, args);
}
}
Also you don't need this:
spring.datasource.driver-class-name
unless you need jpa configuration as well.