ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt:

<dependency>
    <groupId>org.hsqldb</groupId>
    <artifactId>hsqldb</artifactId>
    <scope>runtime</scope>
</dependency>

or the following for mySQL

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>

Add any one jar dependency in pom.xml file for connecting spring boot with data base.

23:20:59.442 [main] DEBUG org.springframework.boot.devtools.settings.DevToolsSettings - Included patterns for restart : []

23:20:59.470 [main] DEBUG org.springframework.boot.devtools.settings.DevToolsSettings - Excluded patterns for restart : [/spring-boot-starter/target/classes/, /spring-boot-autoconfigure/target/classes/, /spring-boot-starter-[\w-]+/, /spring-boot/target/classes/, /spring-boot-actuator/target/classes/, /spring-boot-devtools/target/classes/]

23:20:59.471 [main] DEBUG org.springframework.boot.devtools.restart.ChangeableUrls - Matching URLs for reloading : [file:/C:/Users/Sandeep/Downloads/Compressed/spring-boot-demo/target/test-classes/, file:/C:/Users/Sandeep/Downloads/Compressed/spring-boot-demo/target/classes/]

  .   ____          _            __ _ _

 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \

( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \

 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )

  '  |____| .__|_| |_|_| |_\__, | / / / /

 =========|_|==============|___/=/_/_/_/

 :: Spring Boot ::        (v1.5.2.RELEASE)

2017-07-15 23:21:05.656  INFO 5008 --- [  restartedMain] com.concretepage.MyApplication           : Starting MyApplication on vipul with PID 5008 (C:\Users\Sandeep\Downloads\Compressed\spring-boot-demo\target\classes started by Sandeep in C:\Users\Sandeep\Downloads\Compressed\spring-boot-demo)

2017-07-15 23:21:05.659  INFO 5008 --- [  restartedMain] com.concretepage.MyApplication           : No active profile set, falling back to default profiles: default

2017-07-15 23:21:07.248  INFO 5008 --- [  restartedMain] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@2d7f1219: startup date [Sat Jul 15 23:21:07 IST 2017]; root of context hierarchy

2017-07-15 23:21:29.290  INFO 5008 --- [  restartedMain] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$d24aa2e4] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

2017-07-15 23:21:40.403  INFO 5008 --- [  restartedMain] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)

2017-07-15 23:21:40.857  INFO 5008 --- [  restartedMain] o.apache.catalina.core.StandardService   : Starting service Tomcat

2017-07-15 23:21:40.985  INFO 5008 --- [  restartedMain] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.11

2017-07-15 23:21:45.455  INFO 5008 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext

2017-07-15 23:21:45.456  INFO 5008 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 38371 ms

2017-07-15 23:21:46.295  INFO 5008 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Mapping servlet: 'dispatcherServlet' to [/]

2017-07-15 23:21:46.494  INFO 5008 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]

2017-07-15 23:21:46.569  INFO 5008 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]

2017-07-15 23:21:46.569  INFO 5008 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]

2017-07-15 23:21:46.570  INFO 5008 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]

2017-07-15 23:21:47.836  WARN 5008 --- [  restartedMain] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'inMemoryDatabaseShutdownExecutor' defined in class path resource [org/springframework/boot/devtools/autoconfigure/DevToolsDataSourceAutoConfiguration.class]: Unsatisfied dependency expressed through method 'inMemoryDatabaseShutdownExecutor' 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).

2017-07-15 23:21:47.902  INFO 5008 --- [  restartedMain] o.apache.catalina.core.StandardService   : Stopping service Tomcat

2017-07-15 23:21:48.352  INFO 5008 --- [  restartedMain] utoConfigurationReportLoggingInitializer : 

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.

2017-07-15 23:21:48.380 ERROR 5008 --- [  restartedMain] 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).