Using two datasources with Spring Boot

Question

I followed the docs at https://docs.spring.io/spring-boot/docs/current/reference/html/howto.html#howto-two-datasources and created my source code accordingly. When I start up the application I receive this error message:

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APPLICATION FAILED TO START

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Description:

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

Reason: Failed to determine suitable jdbc url

Action: Consider the following: If you want an embedded database (H2, HSQL or Derby), please put it on the classpath. If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).

I searched for similar issues and only found that one: Error access two datasource with Spring Boot

Answer 1

The solution for this was contained in the error message but (at least for me) a little bit too hidden.

I forgot to add the h2 jar so the real reason wasn't that Spring Boot couldn't determine suitable jdbc url but more the missing driver.