Fix Spring Boot 4 Micrometer auto-configuration and add actuator metrics smoke coverage#4672
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xiang17 wants to merge 7 commits intomicrosoft:mainfrom
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Fix Spring Boot 4 Micrometer auto-configuration and add actuator metrics smoke coverage#4672xiang17 wants to merge 7 commits intomicrosoft:mainfrom
xiang17 wants to merge 7 commits intomicrosoft:mainfrom
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…umentation for Spring Boot 4
… Boot 4 logging so the test can reach the intended Micrometer failure path. 2. making one small adjustment so the app boots with a local SimpleMeterRegistry and the test fails exactly on the missing AI metric behavior
…ame to org.springframework.boot.micrometer.metrics.autoconfigure.* (different module/package)
xiang17
requested review from
harsimar,
jeanbisutti,
rajkumar-rangaraj,
ramthi and
trask
as code owners
xiang17
commented
Apr 8, 2026
| return false; | ||
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| @Environment(JAVA_17) |
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Spring Boot 4.0 requires Java 17 or later. https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-4.0-Migration-Guide
trask
reviewed
Apr 8, 2026
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| @Bean | ||
| public MeterRegistry meterRegistry() { | ||
| return Metrics.globalRegistry; |
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I think returning Metrics.globalRegistry here bypasses the new Spring Boot 4 actuator auto-configuration path. MetricsInstrumentation already adds AzureMonitorMeterRegistry to the global registry, so this smoke test can stay green even if the PR's Boot 4 import hook never runs.
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you could try reverting your fix and re-running this smoke test to make sure it fails without your fix
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Fix #4577.
Spring Boot 4 moved Micrometer metrics auto-configuration classes from
org.springframework.boot.actuate.autoconfigure.metrics.*toorg.springframework.boot.micrometer.metrics.autoconfigure.*.Our Micrometer instrumentation was still keyed only to the Spring Boot 3 class
names, which meant the Azure Monitor meter registry auto-configuration was not
being inserted for Spring Boot 4 applications. As a result, custom Micrometer
metrics such as
demo.requests.totalcould be present locally but never reachApplication Insights.
This change updates the Micrometer instrumentation to support both Spring Boot 3
and Spring Boot 4 auto-configuration class names, and adds smoke coverage for
the Spring Boot 4 path.
Docs for reference
Old package summary, Spring Boot 3.5.8
https://javadoc.io/static/org.springframework.boot/spring-boot-actuator-autoconfigure/3.5.8/org/springframework/boot/actuate/autoconfigure/metrics/package-summary.html
This page explicitly says:
Package org.springframework.boot.actuate.autoconfigure.metrics
Auto-configuration for actuator metrics and Micrometer.
New package summary, Spring Boot 4.0.0
https://javadoc.io/static/org.springframework.boot/spring-boot-micrometer-metrics/4.0.0/org/springframework/boot/micrometer/metrics/autoconfigure/package-summary.html
This page explicitly says:
Package org.springframework.boot.micrometer.metrics.autoconfigure
Auto-configuration for metrics with Micrometer.
Suggested testing
./gradlew :smoke-tests:apps:ActuatorMetricsSpringBoot4:smokeTest --tests '*ActuatorMetricsSpringBoot4Test$Java21Test'./gradlew :smoke-tests:apps:Micrometer:smokeTest --tests "*MicrometerTest*"