Spring Boot exception, error creating bean - spring

Question

I have a maven spring boot application; it is wonderfully working when I start it from Eclipse, but when I call it from command line:
1) mvn package
2) java –jar target/myapp.jar
is throwing error:
11:34:48.418 [main] WARN o.s.b.c.e.AnnotationConfigEmbeddedWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [com/myapp/configuration/JpaConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.IllegalStateException: required key [datasource.sampleapp.hibernate.dialect] not found
11:34:48.421 [main] INFO o.a.catalina.core.StandardService - Stopping service Tomcat
11:34:48.436 [localhost-startStop-1] WARN o.a.c.loader.WebappClassLoaderBase - The web application [myapp] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(Unknown Source)
com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:43)
11:34:48.441 [main] WARN o.s.boot.SpringApplication - Error handling failed (Error creating bean with name 'delegatingApplicationListener' defined in class path resource [org/springframework/security/config/annotation/web/configuration/WebSecurityConfiguration.class]: BeanPostProcessor before instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration': Initialization of bean failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importRegistry' available)
11:34:48.448 [main] ERROR o.s.boot.SpringApplication - Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [com/myapp/configuration/JpaConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.IllegalStateException: required key [datasource.sampleapp.hibernate.dialect] not found
here my pom.xml although when I start the application from eclipse is working fine, so I don’t think that the error is here:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.myapp</groupId>
<artifactId>MyApp</artifactId>
<version>1.0.0</version>
<packaging>jar</packaging>
<name> MyApp </name>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.3.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
<h2.version>1.4.187</h2.version>
</properties>
<dependencies>
…
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>com.playganizer.PlayganizerBackend</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
application.properties:
jdbc.driverClassName = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/myapp
jdbc.username = myuser
jdbc.password = mypass
hibernate.dialect = org.hibernate.dialect.MySQLDialect
hibernate.show_sql = true
hibernate.format_sql = true
Any ideas?

Answer 1

Change your configuration to this I think it will work :
# Connection url for the database "myapp"
spring.datasource.url = jdbc:mysql://localhost:3306/myapp
# Username and password
spring.datasource.username = myuser
spring.datasource.password = mypass
# Show or not log for each sql query
spring.jpa.show-sql = true
spring.jpa.hibernate.ddl-auto = update
# Naming strategy
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
# Allows Hibernate to generate SQL optimized for a particular DBMS
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
Check that in your pom.xml you have those dependencies :
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>

Answer 2

If you read the log again, you will find
java.lang.IllegalStateException: required key [datasource.sampleapp.hibernate.dialect] not found, you need define this property to create the bean.