Datasource instanciation error with actuator - spring-boot

Question

I'm using Spring Boot 2.0.6.RELEASE. My application uses the Oracle jdbc driver and works nice with this kind of configuration:
spring.datasource.url=jdbc:oracle:thin:#my-data-server/database
spring.datasource.username=username
spring.datasource.password=pwd
spring.datasource.hikari.maximum-pool-size=10
spring.datasource.driver-class-name=oracle.jdbc.driver.OracleDriver
But... When adding actuator, the application fails to start. It seems that the /health endpoint causes this problem (maybe because it is the first bean which needs a datasource?).
The problem is that the datasource can't be instanciate... But it works well without actuator.
Any idea ?
I was wondering if DataSourceHealthIndicatorAutoConfiguration could be the source of the problem: this class has the anotation #AutoConfigureAfter(DataSourceAutoConfiguration.class)... But it seems that Hikari doesn't use this autoconfig class, does it? I see org.springframework.boot.autoconfigure.jdbc.DataSourceConfiguration$Hikari in the stack trace but not DataSourceAutoConfiguration...
**UPDATE : ** I'm using FlyWay
**UPDATE 2 **, This may be a hint: https://github.com/spring-projects/spring-boot/issues/14687
Here is the full stacktrace:
2019-02-08 17:33:38.359 ERROR 14652 --- [ost-startStop-1]
o.s.b.web.embedded.tomcat.TomcatStarter : Error starting Tomcat context. Exception: org.springframework.beans.factory.BeanCreationException. Message: Error creating bean with name 'servletEndpointRegistrar' defined in class path resource [org/springframework/boot/actuate/autoconfigure/endpoint/web/ServletEndpointManagementContextConfiguration$WebMvcServletEndpointManagementContextConfiguration.class]: Bean instantiation via factory method failed;
nested exception is org.springframework.beans.BeanInstantiationException:
Failed to instantiate [org.springframework.boot.actuate.endpoint.web.ServletEndpointRegistrar]: Factory method 'servletEndpointRegistrar' threw exception;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'healthEndpoint' defined in class path resource [org/springframework/boot/actuate/autoconfigure/health/HealthEndpointConfiguration.class]: Bean instantiation via factory method failed;
nested exception is org.springframework.beans.BeanInstantiationException:
Failed to instantiate [org.springframework.boot.actuate.health.HealthEndpoint]: Factory method 'healthEndpoint' threw exception;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.actuate.autoconfigure.jdbc.DataSourceHealthIndicatorAutoConfiguration': Bean instantiation via constructor failed;
nested exception is org.springframework.beans.BeanInstantiationException:
Failed to instantiate [org.springframework.boot.actuate.autoconfigure.jdbc.DataSourceHealthIndicatorAutoConfiguration$$EnhancerBySpringCGLIB$$8065d973]: Constructor threw exception;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource': Post-processing of FactoryBean's singleton object failed;
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'scopedTarget.dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed;
nested exception is org.springframework.beans.BeanInstantiationException:
Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception;
nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class
2019-02-08 17:33:38.381 INFO 14652 --- [ restartedMain] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2019-02-08 17:33:38.416 WARN 14652 --- [ost-startStop-1] o.a.c.loader.WebappClassLoaderBase : The web application [ROOT] appears to have started a thread named [spring.cloud.inetutils] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)
2019-02-08 17:33:38.419 WARN 14652 --- [ restartedMain] 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
2019-02-08 17:33:38.437 INFO 14652 --- [ restartedMain] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-02-08 17:33:38.445 ERROR 14652 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.
Reason: Failed to determine a suitable driver class
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 (the profiles dev are currently active).
Process finished with exit code 0