micrometer-metrics/micrometer

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An application observability facade for the most popular observability tools. Think SLF4J, but for observability.

Stars: 4.9k
Forks: 1.2k
Open beginner issues: 0
Indexed issues: 220
Avg merge: 8h 56m
Merged PRs (30d): 87

Dominant language: Java
License: Apache-2.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted

Beginner friendly Everything

Open All

220 open issues indexed

VirtualThreadMetrics does not set base unit for jvm.threads.virtual.parallelism Open

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

micrometer-metrics/micrometer#7945 · 2 comments · Opened Sep 10, 2026
MeterEquivalence.equals(null, null) returns false, inconsistent with Objects.equals Open

waiting-for-triage

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

micrometer-metrics/micrometer#7934 · Opened Sep 8, 2026
Provide a built-in MeterFilter and guidance for redacting sensitive tag values Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

micrometer-metrics/micrometer#7933 · Opened Sep 8, 2026
A failing FunctionCounter or FunctionTimer value function stops the whole publish cycle Open

bug module: micrometer-core needs: design work waiting for team

Difficulty 3/5 1-2 days Newbie friendliness 55/100

micrometer-metrics/micrometer#7916 · 1 comment · Opened Sep 2, 2026
Document best practices Open

doc-update

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

micrometer-metrics/micrometer#7886 · 2 comments · Opened Aug 26, 2026
Add docs for @MeterTag when used on a method Open

doc-update

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

micrometer-metrics/micrometer#7829 · 1 comment · Opened Aug 13, 2026
ProcessorMetrics: Normalize time unit for CPU time metrics Open

waiting-for-triage

Difficulty 3/5 1-2 days Newbie friendliness 64/100

micrometer-metrics/micrometer#7703 · 3 comments · Opened Jul 3, 2026
JvmThreadMetrics: Include daemon flag in JVM thread count metric Open

waiting-for-triage

Difficulty 3/5 1-2 days Newbie friendliness 66/100

micrometer-metrics/micrometer#7702 · 1 comment · Opened Jul 3, 2026
Provide a way to propagate MDC entries to Observations Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

micrometer-metrics/micrometer#7650 · 1 reaction · Opened Jun 18, 2026
Returning the metric name with the highest cardinality of tags Open

enhancement module: micrometer-core

Difficulty 3/5 1-2 days Newbie friendliness 68/100

micrometer-metrics/micrometer#7649 · 4 comments · Opened Jun 18, 2026
Choose and test minimum/maximum supported coroutines versions Open

kotlin type: task

Difficulty 5/5 Over a week Newbie friendliness 30/100

micrometer-metrics/micrometer#7592 · Opened Jun 9, 2026
HumioMeterRegistry uses Meter.match with mixed nullability but doesn't handle null after Open

bug nullability registry: humio

Difficulty 3/5 1-2 days Newbie friendliness 58/100

micrometer-metrics/micrometer#7579 · Opened Jun 8, 2026
Prometheus: expose EscapingScheme and produced content-type Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

micrometer-metrics/micrometer#7564 · 6 comments · Opened Jun 4, 2026
Make event threshold configurable in VirtualThreadMetrics Open

enhancement module: micrometer-java21

Difficulty 3/5 1-2 days Newbie friendliness 66/100

micrometer-metrics/micrometer#7563 · Opened Jun 3, 2026
Upgrade to micrometer-registry-azure-monitor to major applicationinsights-core version Open

waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

micrometer-metrics/micrometer#7561 · 2 comments · Opened Jun 3, 2026
KafkaMetrics dedup/removal miss when a MeterFilter transforms tags (e.g. replaceTagValues) Open

bug instrumentation module: micrometer-core

Difficulty 3/5 1-2 days Newbie friendliness 25/100

micrometer-metrics/micrometer#7541 · 4 comments · Opened May 29, 2026
KafkaMetrics silently drops metrics when MeterFilter is used to add a tag due to hasLessTags flag Open

waiting-for-triage

Difficulty 3/5 1-2 days Newbie friendliness 55/100

micrometer-metrics/micrometer#7516 · 1 comment · Opened May 21, 2026
Support primitive/simple types for KeyValues Open

waiting-for-triage

Difficulty 5/5 Over a week Newbie friendliness 42/100

micrometer-metrics/micrometer#7433 · 1 reaction · Opened Apr 26, 2026
JVM OpenTelemetry Conventions use wrong OTLP data point Open

waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

micrometer-metrics/micrometer#7432 · 1 comment · 3 reactions · Opened Apr 26, 2026
StepFunctionCounter.count() has a race condition Open

feedback-provided waiting for feedback

Difficulty 3/5 1-2 days Newbie friendliness 58/100

micrometer-metrics/micrometer#7417 · 2 comments · Opened Apr 20, 2026
Track the maximum number of active connections in a given time window Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

micrometer-metrics/micrometer#7368 · 4 comments · Opened Apr 1, 2026
Change `process.uptime` to `FunctionCounter` in `UptimeMetrics` Open

breaking-change enhancement

Difficulty 5/5 Over a week Newbie friendliness 38/100

micrometer-metrics/micrometer#7346 · 2 reactions · Opened Mar 26, 2026
GraalVM native image tests and documentation Open

theme: native-image type: task

Difficulty 4/5 3-5 days Newbie friendliness 52/100

micrometer-metrics/micrometer#7326 · Opened Mar 23, 2026
Add deprecation concept to meters Open

enhancement module: micrometer-core needs: design work

Difficulty 5/5 Over a week Newbie friendliness 25/100

micrometer-metrics/micrometer#7311 · 1 reaction · Opened Mar 19, 2026
Add a namespaced tag (`executor.name`) to `ExecutorServiceMetrics` to avoid collisions with generic `name` tag Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

micrometer-metrics/micrometer#7310 · 2 comments · Opened Mar 18, 2026
Negative counter values are invalid for the Prometheus Java Client Open

waiting for team

Difficulty 3/5 1-2 days Newbie friendliness 45/100

micrometer-metrics/micrometer#7302 · 4 comments · Opened Mar 17, 2026
Integration test Kafka instrumentation against latest minor version Open

help wanted type: task

Difficulty 4/5 3-5 days Newbie friendliness 45/100

micrometer-metrics/micrometer#7233 · 2 comments · Opened Feb 25, 2026
Bump Kafka instrumentation baseline from 2.8.2 to 3.9.2 Open

instrumentation module: micrometer-core type: task

Difficulty 3/5 1-2 days Newbie friendliness 48/100

micrometer-metrics/micrometer#7232 · 2 comments · Opened Feb 25, 2026
TomcatMetrics should consider WebModule Open

waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 38/100

micrometer-metrics/micrometer#7214 · Opened Feb 17, 2026
LongTaskTimer not using nativeHistograms for OTLP Open

waiting-for-triage

Difficulty 3/5 1-2 days Newbie friendliness 55/100

micrometer-metrics/micrometer#7201 · Opened Feb 16, 2026
ClassLoader leak (Metaspace OOM) caused by static ThreadLocals in DoubleFormat Open

waiting for team

Difficulty 4/5 3-5 days Newbie friendliness 42/100

micrometer-metrics/micrometer#7184 · 5 comments · Opened Feb 11, 2026
Automatically document the version of services we use in integration tests Open

enhancement help wanted

micrometer-metrics/micrometer#7140 · 9 comments · 1 assignee · Opened Jan 29, 2026
Differences between monitoring ThreadPoolExecutor and ForkJoinPool Open

enhancement help wanted

Difficulty 4/5 3-5 days Newbie friendliness 45/100

micrometer-metrics/micrometer#7089 · 5 comments · Opened Jan 16, 2026
Duplicate classes across modules causes Bazel build failure Open

bug module: micrometer-test needs: design work

Difficulty 3/5 1-2 days Newbie friendliness 45/100

micrometer-metrics/micrometer#7067 · 7 comments · Opened Jan 13, 2026
OpenJDK Project Valhalla investigation Open

type: task

micrometer-metrics/micrometer#7031 · 1 assignee · Opened Dec 23, 2025
Support a publishing filter for PushMeterRegistry Open

feedback-provided feedback-reminder waiting for feedback

Difficulty 4/5 3-5 days Newbie friendliness 45/100

micrometer-metrics/micrometer#7010 · 3 comments · Opened Dec 18, 2025
Cannot configure UCUM units on Timer Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 48/100

micrometer-metrics/micrometer#6988 · 10 comments · Opened Dec 16, 2025
Gauge re-registration warning can confuse users Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

micrometer-metrics/micrometer#6931 · 8 comments · Opened Dec 2, 2025
Support configuring a CA file for OTLP metrics publishing Open

enhancement registry: otlp

Difficulty 4/5 3-5 days Newbie friendliness 55/100

micrometer-metrics/micrometer#6921 · 3 comments · 7 reactions · Opened Nov 25, 2025
Incompatibility of Micrometer and Langfuse Open

waiting-for-triage

Difficulty 3/5 1-2 days Newbie friendliness 45/100

micrometer-metrics/micrometer#6916 · 5 comments · 11 reactions · Opened Nov 24, 2025
Make publishing average configurable Open

enhancement

micrometer-metrics/micrometer#6844 · 15 comments · 1 assignee · Opened Oct 31, 2025
Remove publishing average Open

breaking-change enhancement registry: datadog

Difficulty 4/5 3-5 days Newbie friendliness 35/100

micrometer-metrics/micrometer#6843 · 2 comments · Opened Oct 31, 2025
Parameterize KeyValue in AnnotationHandler Open

breaking-change enhancement

Difficulty 4/5 3-5 days Newbie friendliness 45/100

micrometer-metrics/micrometer#6786 · Opened Oct 9, 2025
VT's metrics Open

waiting-for-triage

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

micrometer-metrics/micrometer#6703 · 1 reaction · Opened Sep 8, 2025
[jOOQ] MetricsDSLContext calls time() twice on fetchValue(SelectField) path, causing tag loss Open

bug help wanted instrumentation module: micrometer-core

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

micrometer-metrics/micrometer#6659 · 4 comments · 3 reactions · Opened Aug 23, 2025
JvmMemoryMetrics max heap metrics may not sum to actual max heap value Open

instrumentation module: micrometer-core waiting for team

Difficulty 3/5 1-2 days Newbie friendliness 45/100

micrometer-metrics/micrometer#6588 · 1 comment · 2 reactions · Opened Aug 3, 2025
Add binder for AWS SDK v2 metrics Open

waiting-for-triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

micrometer-metrics/micrometer#6579 · 2 reactions · Opened Jul 30, 2025
Add API support for providing fallback for KeyValues Open

enhancement module: micrometer-observation

Difficulty 4/5 3-5 days Newbie friendliness 35/100

micrometer-metrics/micrometer#6564 · 1 reaction · Opened Jul 23, 2025
VirtualThreadMetrics misreports live virtual threads count Open

bug instrumentation

Difficulty 4/5 3-5 days Newbie friendliness 52/100

micrometer-metrics/micrometer#6504 · 3 comments · 1 reaction · Opened Jul 2, 2025
Rework KafkaMetrics based on Kafka's MetricsReporter Open

enhancement help wanted instrumentation module: micrometer-core

Difficulty 4/5 3-5 days Newbie friendliness 38/100

micrometer-metrics/micrometer#6502 · 6 comments · Opened Jul 2, 2025

micrometer-metrics/micrometer

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