posted 2 months ago Show
Hello, i'am new to spring and trying to find solution to this error can someone please help and tell me what am i doing wrong? here is the error i am getting: INFO Root WebApplicationContext: initialization started 23:08:33.435
o.s.web.context.ContextLoader And here are the config classes: --- --- --- --- I'd really appreciate if anyone can guide me, thank you! Hello guys, If you are using Spring Boot and getting errors like "Cannot determine embedded database driver class for database type NONE" or "Error creating a bean with name 'dataSource' defined in class path resource ataSourceAutoConfiguration" then you have come to the right place. In this article, we'll examine different scenarios on which this
Spring Boot error comes and what you can do to solve them. The general reason for this error is Spring Boot's auto-configuration, which is trying to automatically configure a DataSource for you but doesn't have enough information. It is automatically trying to create an instance of DataSourceAutoConfiguration bean and it's failing. Let's see the stacktrace looks in general: org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public javax.sql.DataSource org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$NonEmbeddedConfiguration.dataSource()]
threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want an embedded database please put a supported one on the classpath.: Btw, these errors can be intimidating if you are completely new to Spring framework. In that case, I suggest you go through a comprehensive Spring Boot course like the Learn Spring Boot by Dan Vega on Udemy. Now, let's see some common cause of this error and what you can do to solve this problem. 1. Spring Boot Error due to Starter DependencySome of my friends and readers got this error even if they don't need a Database. The main reason they were getting this error was because of starter dependency like some of they have included spring-boot-starter-data-jpa which then included hibernate-entitymanager.jar and they didn't have additional things need to set that up. Sometimes including incorrect Starter POM can also solve this problem like adding spring-boot-starter-jdbc instead of spring-boot-starter-data-jpa dependency. If you know, Spring Boot auto-configuration is triggered by JAR dependencies present in the classpath and if it pulls something which you don't need then this type of error can come. That's why a good knowledge of Spring fundamentals are needed to use Spring boot correctly. If you are new into the Spring framework, I suggest you go through Learn Spring: The Certification Class by Eugen Paraschiv of Baeldung to learn Spring 5 and Spring Boot 2 from scratch, in a guided, code-focused way  2. Due to Missing DependencySometimes you do need a database but you forgot to include the driver JAR file into the classpath, which can also cause this error. For example, you have specified the following properties in the application.properties, spring boots configuration file but didn't include the corresponding MySQL JDBC driver into the classpath spring.datasource.url = jdbc:mysql://localhost/test In order to solve this error, either you need to include the correct Starter POM dependency or manually add the MySQL JDBC JAR file into the classpath. If you are interested, you can see this tutorial to learn more about how to connect a Java application to a database using a MySQL database in this tutorial. 3. Due to Missing Configuration in Application.propertiesSpring Boot is good at configuring in-memory Databases like H2, HSQLDB, Derby, etc and it can configure them by just adding their JAR files into the classpath but for others, you need to give Spring Boot additional details like URL, DriverClass name, etc. You can do that by adding some properties to application.properties file with the spring.datasource prefix, as shown in following example: spring.datasource.url = jdbc:mysql://localhost/abc This will provide the Spring Boot auto-configuration component to configure the database for you. If you want to learn more about how auto-configuration works in Spring Boot, I suggest you go through a comprehensive Spring boot course like Spring Boot: Efficient Development, Configuration, and Deployment course on Pluralsight, which will also teach you the details behind @EnableAutoConfiguration by writing your own auto configurations. 4. Exclude DataSourceAutoConfigurationSometimes excluding DataSourceAutoConfigution can also solve this problem, especially if you don't need Database. This will prevent Spring Boot from automatically configuration database and there won't be any error. You can disable auto-configuration for certain classes by using the exclude Attribute of @EnableAutoConfiguration annotation of Spring Boot as shown below: @Configuration @EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class}) public class SpringBootDemo { public static void main(String[] args) { SpringApplication.runSpringBootDemo.class, args); } } You can even exclude more than one classes using exclude attribute with @EnableAutoConfiguration as shown below: @Configuration @EnableAutoConfiguration( exclude = {DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class}) public class SpringBootDemo { public static void main(String[] args) { SpringApplication.runSpringBootDemo.class, args); } }That's all about how to solve "Cannot determine embedded database driver class for database type NONE" or "Error creating a bean with name 'dataSource' defined in class path resource DataSourceAutoConfiguration" problem. In most of the cases, it is because of auto-configuration doesn't have enough details require to configure Database but sometimes it's also the accidental trigger of database auto-configuration which can be disabled using exclude attribute of @EnableAutoConfiguration annotation. Btw, if you want to learn Spring Boot in depth, here are some useful resources for your learning: Other Java and Spring Boot articles you may like
Thanks for reading this article so far. If you like my explanation and solution of this Spring Boot error then please share with your friends and colleagues. If you have any questions or feedback then please drop a note. P. S. - If you are interested in learning Spring Boot but looking for a free course to start with then I suggest you check the Free Introducing Spring Boot course on Udemy to kick start your journey into the beautiful world of Spring. How do I resolve Beandefinitionoverrideexception?Solution is:. Make sure you are using compatible versions of spring-data-dynamodb / spring-boot / spring-data by checking the compatibility matrix.. Make sure each repository is created only once. In my case, I had to add.. Can we have bean with same name in spring boot application?Spring beans are identified by their names within an ApplicationContext. Thus, bean overriding is a default behavior that happens when we define a bean within an ApplicationContext which has the same name as another bean. It works by simply replacing the former bean in case of a name conflict.
Can we have 2 beans with same name?There is no solution for same bean name. At run-time when you will get the autowired class then the primary true bean will get the preference for autowiring.
Can we define two beans with same name in spring?Can I define spring bean twice with same name in different bean definition file? Yes. When the second bean definition file loads, it overrides the definition from the first file. The main objective of this behavior is to ovrrride the previously loaded bean definition.
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Invalid bean definition with name springSecurityFilterChain defined in class path resource
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