Troubleshooting Spring Boot app that won't connect to MySQL - mysql

Question

I built the MySQL connector and the database details into the app and it still wont connect to MySQL when running in Tomcat. My app is entirely open source and all source code is on the web at: https://github.com/clickcell/AutomationStatisticsPortal
The application.class
The gradle build file
The application.properties file, different from my repository, is:
spring.datasource.url=jdbc:mysql://localhost/springboot
spring.datasource.username=newuser
spring.datasource.password=password
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
I have tried setting up the MySQL 5.5 server to match application.properties
Every time the symptom is as follows:
Web app running but there is no database connection, no data being displayed.
I use Tomcat8 and MySQL 5.5. I have enabled the query log and monitor it using tail -f when I run queries direct to the server they show up in the log but when I reboot my app in the tomcat manager, nothing shows up in that log.
In the tomcat log I get the following:
21-Dec-2016 10:19:16.693 INFO [http-nio-8080-exec-6] org.apache.catalina.core.StandardContext.reload Reloading Context with name [/AutomationStatisticsPortal] has started
21-Dec-2016 10:19:17.339 WARNING [http-nio-8080-exec-6] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc The web application [AutomationStatisticsPortal] registered the JDBC driver [org.h2.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
21-Dec-2016 10:19:19.026 INFO [http-nio-8080-exec-6] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
21-Dec-2016 10:19:26.839 INFO [http-nio-8080-exec-6] org.apache.catalina.core.StandardContext.reload Reloading Context with name [/AutomationStatisticsPortal] is completed
It looks like it's registering the wrong kind of database driver, but I do not know why given my configuration.

Answer 1

The log you've shown is produced when H2 is used.
I cloned your repository and tested locally, it works when I update the src/main/resources/application.properties with MySQL parameters.
You should remove the other one in root, it's ambiguous.
You could also replace your application.properties file in src/main/resources with this application.yml file:
spring:
datasource:
type: com.zaxxer.hikari.HikariDataSource
url: jdbc:mysql://localhost/springboot
username: newuser
password: password
jpa:
database-platform: org.hibernate.dialect.MySQL5InnoDBDialect
database: MYSQL
show-sql: true
In this case, add the Hikary dependency, or use another datasource type.