v1.4.1 release

Release of core packages

• opentelemetry-api
• opentelemetry-sdk

and exporter packages:

• opentelemetry-exporter-otlp (gRPC + HTTP/JSON)
• opentelemetry-exporter-etw
• opentelemetry-exporter-zipkin
• opentelemetry-exporter-jaeger (thrift + UDP/HTTP)

Changelog

API

• No API change.

SDK

• fix: WaitOnSocket select error when sockfd above FD_SETSIZE (#1410)
• fix OTEL_INTERNAL_LOG_INFO (#1407)

Build

• Upgrade nlohmann_json to 3.10.5 (#1441)
• install sdk-config.h (#1419)
• fix nlohmann_json's (third party) include dir (#1415)

Example

• Log current timestamp instead of epoch time (#1434)

Docs

• Fixed broken link to OpenTelemetry.io (#1446)
• Fix GettingStarted documentation for Jaeger HTTP exporter (#1439)
• Document Getting Started with Prometheus and Grafana (#1396)

Metrics features

• Fix variables inizialization (#1430)
• fix histogram (#1440)
• Add attributes/dimensions to metrics ostream exporter (#1400)
• Only record non-negative / finite / Non-NAN histogram values (#1427)
• Pass state to async callback function. (#1408)