SpringBoot Datasource configuration issue with Hikari and spring boot 2

I'm trying to make a database connection in a small spring boot app using the following Hikari configs.

spring:
  datasource:
    hikari:
      idle-timeout: 60000
      maximum-pool-size: 50
      minimum-idle: 5
      connection-test-query: SELECT 1
      driver-class-name: com.microsoft.sqlserver.jdbc.SQLServerDriver
      validation-timeout: 500
      register-mbeans: true
      jdbc-url: jdbc:sqlserver://URL_HERE
      username: FAKE_USERNAME
      password: FAKE_PASSWORD

Then i get a error : Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

But when i add the following with the above hikari configs the app starts up fine. I'm not sure but i think it should not depend on the below url and just use the hikari one if its specified there.

spring:
  datasource:
    url: jdbc:sqlserver://URL_HERE

Comment From: snicoll

Thanks for the report. Unfortunately, that's not how this works. spring.datasource.hikari.* (as well as spring.datasource.tomcat.*and spring.datasource.dbcp2.*) are used to provide additional, connection pools-specific options.

The auto-configuration requires that basic settings are provided via spring.datasource.*. This also makes sure that your DataSource can be configured if another connection pool is on the classpath.