"Application Failed to Start" - spring-boot

Question

I am getting the following exception:
2017-05-24 09:41:40.779 INFO 4412 --- [ main] com.develop.NewApplication : Starting NewApplication on DESKTOP-4GP5JJA with PID 4412 (started by Athira S in C:\Users\Athira S\workspace\new)
2017-05-24 09:41:40.779 INFO 4412 --- [ main] com.develop.NewApplication : No active profile set, falling back to default profiles: default
2017-05-24 09:41:40.857 INFO 4412 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext#6a28ffa4: startup date [Wed May 24 09:41:40 EDT 2017]; root of context hierarchy
2017-05-24 09:41:41.886 INFO 4412 --- [ main] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
2017-05-24 09:41:42.198 WARN 4412 --- [ main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Tomcat.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Cannot determine embedded database driver class for database type NONE. 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).
2017-05-24 09:41:42.214 INFO 4412 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-05-24 09:41:42.214 ERROR 4412 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
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).

Answer 1

Assuming you are dealing with a spring boot application, you have 2 solutions:
OPTION 1. If you have a database you can hook up to your application, set the properties group for the spring datasource:
sample application.properties:
spring.datasource.url=jdbc://mysql://localhost:3306/dbname
spring.datasource.username=db_username
spring.datasource.password=db_password
(The same properties group can be set in yml if you are using that:)
sample application.yml:
spring:
datasource:
url: jdbc:mysql://localhost:3306/dbname
username: db_username
password: db_password
OPTION 2. If you don't have a database to connect to
Remove the dependency on spring-boot-starter-jdbc [or spring-boot-starter-jpa as the jdbc starter is a dependency of the starter jpa]
If you are using maven, that dependency looks like this:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
In gradle, it'd be something like this:
compile 'org.springframework.boot:spring-boot-starter-jdbc'
If this isn't the case for you, please add some more context (such as your pom.xml | build.gradle, and/or application.properties | application.yml so that we can see more of what's going on.

Answer 2

I can not find your question. For this error, you should had some kind of embeded jdbc driver jar, like H2, sqlite, added in your pom. For H2 it is:
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
</dependency>
You don't need version, if you use spring-boot-starter-parent as parent.

Answer 3

I was getting this because my port(8080) was being used in the background. killing that PID did the trick for me