Cyclic dependency around auto-configuration of JDBC instrumentation #2169
Description
Starting from Spring Boot 2.7.0-RC1 (see spring-projects/spring-boot#30282) DataSource beans depend on Micrometer's MeterRegistry (since Boot auto-configures a Micrometer binder that uses the DataSource). Because of TraceDataSourceDecoratorBeanPostProcessor (that post processes DataSource beans), DataSource instances depend on Sleuth's Tracer. If Zipkin is used, the Tracer depends on Micrometer's MeterRegistry since we auto-configure Micrometer support for Zipkin.
A simplified view of the issue:
MeterRegistry -> DataSource -> Tracer -> MeterRegistry