Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured

Question

I am working on a Spring Boot Batch example with MongoDB and I have already started the mongod server.

When I launch my application, I

Answer 1

Root Cause

The JPA (Java persistence API) is a java specification for ORM (Object-Relational Mapping) tools. The spring-boot-starter-data-jpa dependency enables ORM in the context of the spring boot framework.

The JPA auto configuration feature of the spring boot application attempts to establish database connection using JPA Datasource. The JPA DataSource bean requires database driver to connect to a database.

The database driver should be available as a dependency in the pom.xml file. For the external databases such as Oracle, SQL Server, MySql, DB2, Postgres, MongoDB etc requires the database JDBC connection properties to establish the connection.

You need to configure the database driver and the JDBC connection properties to fix this exception Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured. Reason: Failed to determine a suitable driver class.

application.properties

spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration 

application.yaml

spring:
autoconfigure:
    exclude:org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration

By Programming

@SpringBootApplication(exclude =  {DataSourceAutoConfiguration.class })

Answer 2

I had the same issue and tried all suggestions above, but didnt work out. I am posting my answer for furture readers. Before it was working fine but somehow it apeared again. I resolved this issue by removing some unnecessary plugnins and depencies from pom.xml

1. First of all, I changed default packaging type to jar (Spring Boot Initializer gives pom in packaging)

   <packaging>jar</packaging>

2. I added unintentional some plugins:

   <plugin> <artifactId>maven-war-plugin</artifactId> <configuration> <attachClasses>true</attachClasses> <webXml>target/web.xml</webXml> <webResources> <resource> <directory>src/main/webapp</directory> <filtering>true</filtering> </resource> </webResources> </configuration> </plugin>

I hope my answer will help someone.

Answer 3

Just add : @SpringBootApplication(exclude = {DataSourceAutoConfiguration.class }) works for me.

I was getting same error I tried with @EnableAutoConfiguration(exclude=...) didn't work.

Answer 4

I had the same issue resolved by add <scope>provided</scope>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
            <scope>provided</scope>
        </dependency>

Source: https://github.com/spring-projects/spring-boot/issues/13796#issuecomment-413313346

Answer 5

It can be that your resources directory is not added to classpath when creating a project via Spring Initializr. So your application is never loading the application.properties file that you have configured.

To make a quick test if this is the case, add the following to your application.properties file:

server.port=8081

Now when running your application you should see in the spring boot console output something like this:

INFO  o.s.b.w.e.tomcat.TomcatWebServer - Tomcat started on port(s): **8081** (http) with context path ''

If your port is still default 8080 and not changed to 8081, your application.properties files is obviously not loading.

You can also check if your application runs with gradle bootRun from command line. Which most likely will be work.

Solution:

1. Close IntelliJ, then inside your project folder delete the ".idea" folder
2. Reimport your project to IntelliJ like following: "Import Project" -> "select ONLY your build.gradle file to import". (IntelliJ will automatically grab the rest)
3. build and run your application again

See official answer by IntelliJ Support: IDEA-221673

Answer 6

For spring boot version 2.X.X below configuration worked for me.

spring.datasource.url=jdbc:mysql://localhost:3306/rest
spring.datasource.username=
spring.datasource.password=
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.database-platform = org.hibernate.dialect.MySQL5Dialect
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto = update 

Old jdbc driver is deprecated. The new one is mentioned on above configuration. Please use the same and restart the project.