title: HikariPool-1 - jdbcUrl is required with driverClassName
body: <p>I went back to programming my old program <a href="https://github.com/JonkiPro/REST-Web-Services" rel="noreferrer">https://github.com/JonkiPro/REST-Web-Services</a>. I've updated Spring Boot from version 15.6 to version 2.0.0. I have encountered many problems with compilation, but I can not deal with one. Well, during compilation, he throws me in the console</p>
  
  <pre><code>2018-03-18 21:54:53.339 ERROR 3220 --- [ost-startStop-1] com.zaxxer.hikari.HikariConfig           : HikariPool-1 - jdbcUrl is required with driverClassName.
  2018-03-18 21:54:55.392  INFO 3220 --- [ost-startStop-1] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'unit'
  2018-03-18 21:54:56.698  INFO 3220 --- [ost-startStop-1] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'unit'
  2018-03-18 21:54:56.778 ERROR 3220 --- [ost-startStop-1] com.zaxxer.hikari.HikariConfig           : HikariPool-1 - jdbcUrl is required with driverClassName.
  2018-03-18 21:54:56.782 ERROR 3220 --- [ost-startStop-1] o.s.b.web.embedded.tomcat.TomcatStarter  : Error starting Tomcat context. Exception: org.springframework.beans.factory.UnsatisfiedDependencyException. Message: Error creating bean with name 'webSecurityConfig': Unsatisfied dependency expressed through field 'userDetailsService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userDetailsService' defined in file [C:\Users\Jonatan\Documents\GitHub\REST-Web-Services\web\out\production\classes\com\web\web\security\service\impl\UserDetailsServiceImpl.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': Cannot create inner bean '(inner bean)#65d6e77b' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#65d6e77b': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory': Post-processing of FactoryBean's singleton object failed; nested exception is java.lang.IllegalArgumentException: jdbcUrl is required with driverClassName.
  2018-03-18 21:54:56.821  WARN 3220 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
  </code></pre>
  
  <p>I've never had such a mistake. I do not know what it means completely. My properties for the base look like this</p>
  
  <pre><code>spring:
    datasource:
      driver-class-name: org.postgresql.Driver
      url: jdbc:postgresql:database
      username: root
      password: root
      schema: classpath:/db/init/schema.sql
  </code></pre>
  
  <p>I do not know how to deal with this error. I've been programming quite a long time, but for the first time I'm meeting the concept of <code>hikari</code>. I'm using a Tomcat(in Spring Boot) server and a PostgreSQL database.</p>