1.17.0-RC1

⭐ New Features

• Add meter for ForkJoinPool#getDelayedTaskCount #6381
• Add support for JDK 26's MemoryPoolMXBean.getTotalGcCpuTime() #7245
• Clear the state of the ObservationValidator #7337
• Improve exemplars sizing and add exemplarsSize config #7324
• Log warning when a registry is added to composite after meter registration #6908
• Treat OkHttp Request as non-nullable #7388
• Validate Observation.Scope closing when using TestObservationRegistry #6329

🐞 Bug Fixes

• Invalid reflection hint in micrometer-core for native GraalVM 25 build #7316
• ObservationGrpcClientInterceptor throws NPE when NameResolver returns empty authority #7380
• ObservationValidator scope LIFO validation produces false positives for parallel observations #7288
• Wrong Nullability Information in OkHttpMetricsEventListener #7373

🔨 Dependency Upgrades

• Bump activemq-artemis from 2.52.0 to 2.53.0 #7317
• Bump biz.aQute.bnd:biz.aQute.bnd.gradle from 7.2.1 to 7.2.3 #7341
• Bump com.google.cloud:google-cloud-monitoring from 3.87.0 to 3.89.0 #7291
• Bump com.google.cloud:libraries-bom from 26.77.0 to 26.79.0 #7355
• Bump com.gradle.develocity from 4.3.2 to 4.4.0 #7343
• Bump com.gradleup.shadow from 9.3.2 to 9.4.1 #7354
• Bump com.netflix.nebula:gradle-info-plugin from 16.1.0 to 16.2.1 #7266
• Bump com.netflix.nebula:nebula-project-plugin from 13.0.1 to 13.1.0 #7282
• Bump com.netflix.nebula:nebula-publishing-plugin from 23.0.0 to 23.1.0 #7279
• Bump com.netflix.spectator:spectator-reg-atlas from 1.9.4 to 1.9.6 #7278
• Bump grpc from 1.79.0 to 1.80.0 #7304
• Bump io.prometheus:prometheus-metrics-bom from 1.5.0 to 1.5.1 #7318
• Bump org.jooq:jooq from 3.20.11 to 3.21.1 #7333
• Bump software.amazon.awssdk:cloudwatch from 2.42.10 to 2.42.9 #7361
• Bump spring6 from 6.2.16 to 6.2.17 #7292

❤️ Contributors

Thank you to all the contributors who worked on this release:

@Goooler, @Joowon-Seo, @belugabehr, @izeye, and @ribafish

1.16.5

🐞 Bug Fixes

• Invalid reflection hint in micrometer-core for native GraalVM 25 build #7316
• ObservationGrpcClientInterceptor throws NPE when NameResolver returns empty authority #7380
• Wrong Nullability Information in OkHttpMetricsEventListener #7373

🔨 Dependency Upgrades

• Bump com.netflix.spectator:spectator-reg-atlas from 1.9.4 to 1.9.6 #7393
• Bump spring6 from 6.2.16 to 6.2.17 #7294

❤️ Contributors

Thank you to all the contributors who worked on this release:

@Joowon-Seo, and @ribafish

1.15.11

🐞 Bug Fixes

• Invalid reflection hint in micrometer-core for native GraalVM 25 build #7316

🔨 Dependency Upgrades

• Bump org.apache.maven:maven-resolver-provider from 3.9.13 to 3.9.14 #7280
• Bump spring6 from 6.2.16 to 6.2.17 #7294

❤️ Contributors

@Joowon-Seo and @ribafish
Thank you to all the contributors who worked on this release:

1.17.0-M3

See also the 1.17 migration guide.

Deprecations

• Deprecate DynatraceConfig#group #7181
• Un-deprecate DynatraceConfig#apiToken #7180
• Deprecate unused Observation.Scope-related methods #7255

⭐ New Features

• Make OtlpMetricsSender.Request#toString human-readable #7264
• OTLP exemplar support #3795
• Support meters with the same name but different set of tag keys in PrometheusMeterRegistry #877

Dependency upgrades

• Bump io.opentelemetry.proto:opentelemetry-proto from 1.9.0-alpha to 1.10.0-alpha #7265

❤️ Contributors

Thank you to all the contributors who worked on this release:

@izeye

1.16.4

🐞 Bug Fixes

• Using context-propagation with a no-op Observation corrupts the current Observation #7200

📔 Documentation

• Document (Default)MeterObservationHandler #6361
• Document Jakarta Mail instrumentation #6485
• Document statsd UDS config #5730

❤️ Contributors

Thank you to all the contributors who worked on this release:

@izeye, @kangdaeun1022, and @seonghyeoklee

1.15.10

📔 Documentation

• Document (Default)MeterObservationHandler #6361
• Document statsd UDS config #5730

❤️ Contributors

Thank you to all the contributors who worked on this release:

@seonghyeoklee, @kangdaeun1022, and @izeye

1.17.0-M2

⭐ New Features

• Fix escaping for Telegraf StatsD #6513
• Support compressing metrics payload in OtlpConfig and OtlpHttpMetricsSender #7009
• Time-windowed max gauge for OTLP histograms #6159

Deprecations

• Deprecate Dynatrace v1 support #6923
• Deprecate Apache HTTP client instrumentation in favor of httpclient5-observation #7158

📔 Documentation

• Document OtlpConfig#compressionMode #7108

🔨 Dependency Upgrades

• Bump com.google.auth:google-auth-library-oauth2-http from 1.41.0 to 1.42.1 #7110
• Bump com.google.cloud:google-cloud-monitoring from 3.82.0 to 3.84.0 #7149
• Bump com.google.cloud:libraries-bom from 26.73.0 to 26.75.0 #7150
• Bump com.netflix.spectator:spectator-reg-atlas from 1.9.3 to 1.9.4 #7160
• Bump dropwizard-metrics from 4.2.37 to 4.2.38 #7114
• Bump io.dropwizard.metrics5:metrics-core from 5.0.5 to 5.0.6 #7118
• Bump io.micrometer:context-propagation from 1.2.0 to 1.2.1 #7175
• Bump software.amazon.awssdk:cloudwatch from 2.41.10 to 2.41.9 #7119

❤️ Contributors

Thank you to all the contributors who worked on this release:
@allnightlong, @BenEfrati, @pythaac, and @izeye

1.16.3

🐞 Bug Fixes

• Add immutable noop Observation.Context #7133
• OSGi test isn't reporting failures #7060

📔 Documentation

• Docs: Align AsciiDoc callout syntax #7148
• Improve documentation of ExecutorServiceMetrics #7083

🔨 Dependency Upgrades

• Bump ch.qos.logback:logback-classic from 1.5.24 to 1.5.26 #7125
• Bump com.hazelcast:hazelcast from 5.3.8 to 5.6.0 #6802
• Bump com.netflix.spectator:spectator-reg-atlas from 1.9.3 to 1.9.4 #7166
• Bump dropwizard-metrics from 4.2.37 to 4.2.38 #7120
• Bump gradle-wrapper from 8.14.3 to 8.14.4 #7112
• Bump grpc from 1.76.2 to 1.76.3 #7137
• Bump io.dropwizard.metrics5:metrics-core from 5.0.5 to 5.0.6 #7124
• Bump io.freefair.aspectj.post-compile-weaving from 8.14.3 to 8.14.4 #7070
• Bump io.spring.develocity.conventions from 0.0.24 to 0.0.25 #7101
• Bump org.assertj:assertj-core from 3.27.6 to 3.27.7 #7126

❤️ Contributors

Thank you to all the contributors who worked on this release:

@izeye, @mateusz-nalepa, and @tkmsaaaam

1.15.9

🐞 Bug Fixes

• Add immutable noop Observation.Context #7133
• OSGi test isn't reporting failures #7060

📔 Documentation

• Docs: Align AsciiDoc callout syntax #7148
• Improve documentation of ExecutorServiceMetrics #7083

🔨 Dependency Upgrades

• Bump dropwizard-metrics from 4.2.37 to 4.2.38 #7120
• Bump gradle-wrapper from 8.14.3 to 8.14.4 #7112
• Bump io.spring.develocity.conventions from 0.0.24 to 0.0.25 #7099
• Bump org.assertj:assertj-core from 3.27.6 to 3.27.7 #7123

❤️ Contributors

@izeye, @mateusz-nalepa, and @tkmsaaaam
Thank you to all the contributors who worked on this release:

1.17.0-M1

⚠️ Noteworthy

• Remove transitive runtime dependency on LatencyUtils #6883
• Enable java.* imports for OSGi Import-Package #6816

⭐ New Features

• Add AssertJ assertions for various Meters #6870
• Add benchmark for filtered log events #6894
• Apply @CheckReturnValue to Assert implementations #7038
• Improve Scalar Replacement consistency in AbstractCompositeMeter to avoid unnecessary allocation #6811
• Improve efficiency of MeterRegistry#getMeters #7035
• Metrics not collected after ScheduledExecutorService recreation #6920
• Remove ThreadLocal usage from LogbackMetrics #6882
• Remove transitive runtime dependency on LatencyUtils #6883
• Support Postgresql 17 in PostgreSQLDatabaseMetrics #6657

🐞 Bug Fixes

• CaffeineCacheMetrics nullability is incompatible with Caffeine 3.2.3 #6973
• ExecutorServiceMetrics: repeatedly logs exception when monitoring ThreadPerTaskExecutor without --add-opens #6726

🔨 Dependency Upgrades

• Bump com.google.auth:google-auth-library-oauth2-http from 1.40.0 to 1.41.0 #6934
• Bump com.google.cloud:google-cloud-monitoring from 3.79.0 to 3.82.0 #6885
• Bump com.google.cloud:libraries-bom from 26.71.0 to 26.73.0 #6906
• Bump com.netflix.spectator:spectator-reg-atlas from 1.9.1 to 1.9.3 #6905
• Bump io.prometheus:prometheus-metrics-bom from 1.4.2 to 1.4.3 #6866
• Bump software.amazon.awssdk:cloudwatch from 2.37.5 to 2.41.4 #7011

❤️ Contributors

Thank you to all the contributors who worked on this release:

@MariusVolkhart, @etrandafir93, @izeye, @rethab, and @slovdahl