micrometer
https://github.com/micrometer-metrics/micrometer
Java
An application observability facade for the most popular observability tools. Think SLF4J, but for observability.
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- Issues
- Make inclusion of `LongTaskTimer` by `DefaultMeterObservationHandler` opt-in instead of opt-out
- Add runtime tag support to Log4j2Metrics
- Add a namespaced tag (`executor.name`) to `ExecutorServiceMetrics` to avoid collisions with generic `name` tag
- Negative counter values are invalid for the Prometheus Java Client
- Bump org.jetbrains.kotlin.jvm from 2.2.21 to 2.3.20
- Add FunctionCounter for MemoryMXBean.getTotalGcCpuTime
- Add Gauges for memory usage after GC
- Use per-thread scope stack in ObservationValidator LIFO validation
- ObservationValidator scope LIFO validation produces false positives for parallel observations
- Jetty 12's TimedHandler marks some requests with outcome UNKNOWN
- Docs
- Java not yet supported