SpringBoot 2.4.5 to 2.5.0 made almost all Micrometer/Prometheus metrics disappear

I upgraded an application from 2.4.5 to 2.5.0 and almost all Micrometer/Prometheus metrics stopped getting reported in the prometheus actuator. Where I previously had hundreds of (Micrometer) metrics reported in 2.4.5, in 2.5.0 I now only get a few metrics from spring_kafka_xxx and http_server_xxx.

Reverting back to 2.4.5 brings all metrics back again. I have found no release notes that would indicate that this is intentional. Upon startup, the following rows are suspiciously logged on 2.5.0 (but not on 2.4.5):

2021-06-03 07:56:55.840+0200 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - [postProcessAfterInitialization] Bean 'management.metrics-org.springframework.boot.actuate.autoconfigure.metrics.MetricsProperties' of type [org.springframework.boot.actuate.autoconfigure.metrics.MetricsProperties] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-03 07:56:55.843+0200 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - [postProcessAfterInitialization] Bean 'org.springframework.boot.actuate.autoconfigure.metrics.data.RepositoryMetricsAutoConfiguration' of type [org.springframework.boot.actuate.autoconfigure.metrics.data.RepositoryMetricsAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-03 07:56:55.847+0200 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - [postProcessAfterInitialization] Bean 'org.springframework.boot.actuate.autoconfigure.metrics.export.simple.SimpleMetricsExportAutoConfiguration' of type [org.springframework.boot.actuate.autoconfigure.metrics.export.simple.SimpleMetricsExportAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-03 07:56:55.853+0200 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - [postProcessAfterInitialization] Bean 'management.metrics.export.simple-org.springframework.boot.actuate.autoconfigure.metrics.export.simple.SimpleProperties' of type [org.springframework.boot.actuate.autoconfigure.metrics.export.simple.SimpleProperties] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-03 07:56:55.865+0200 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - [postProcessAfterInitialization] Bean 'simpleConfig' of type [org.springframework.boot.actuate.autoconfigure.metrics.export.simple.SimplePropertiesConfigAdapter] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-03 07:56:55.870+0200 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - [postProcessAfterInitialization] Bean 'org.springframework.boot.actuate.autoconfigure.metrics.MetricsAutoConfiguration' of type [org.springframework.boot.actuate.autoconfigure.metrics.MetricsAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-03 07:56:55.876+0200 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - [postProcessAfterInitialization] Bean 'micrometerClock' of type [io.micrometer.core.instrument.Clock$1] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-03 07:56:55.907+0200 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - [postProcessAfterInitialization] Bean 'simpleMeterRegistry' of type [io.micrometer.core.instrument.simple.SimpleMeterRegistry] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-03 07:56:55.915+0200 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - [postProcessAfterInitialization] Bean 'repositoryTagsProvider' of type [org.springframework.boot.actuate.metrics.data.DefaultRepositoryTagsProvider] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2021-06-03 07:56:55.920+0200 [main] INFO  o.s.c.s.PostProcessorRegistrationDelegate$BeanPostProcessorChecker - [postProcessAfterInitialization] Bean 'metricsRepositoryMethodInvocationListener' of type [org.springframework.boot.actuate.metrics.data.MetricsRepositoryMethodInvocationListener] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

Comment From: snicoll

Duplicate of #26630