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OpenTelemetry Changelog

This site tracks pull requests to the OpenTelemetry Specification, Semantic Conventions, and Proto Definitions. The following items are tracked:

  • Non-trivial specification changes and releases.
  • New semantic convention areas or stability changes, as well as releases.
  • Updates and releases of the protos.

The goal of this site is to give maintainers a single reference for important cross-functional changes.

To add a Pull Request to this feed, label it with changelog.opentelemetry.io

Release 1.52.0

Context

  • Make the W3C randomness flag required.
12/12/2025open-telemetry/opentelemetry-specificationreleasedBy @carlosalberto

Define Nginx Ingress Controller events

Changes

12/7/2025open-telemetry/semantic-conventionsclosedBy @gregkalapos

2025.11

What's Changed

  • Update opentelemetry-proto version to v1.9.0 by @otelbot[bot] in https://github.com/open-telemetry/opentelemetry.io/pull/8308
  • Refresh refcache by @otelbot-docs[bot] in https://github.com/open-telemetry/opentelemetry.io/pull/8310
11/29/2025open-telemetry/opentelemetry.ioreleasedBy @theletterf

Proposal for vector db semantic convention

This is a proposal for vector db semantic convention (see #936). I tried to expand the db semantic convention adding some db.vector attributes. I tried to focus on the basic needs of a general purpose vector database.

I proposed the following experimental attributes (updated with the feedbacks in this PR):

11/24/2025open-telemetry/semantic-conventionsclosedBy @ezimuel

Release 1.51.0

Metrics

  • AlignedHistogramBucketExemplarReservoir SHOULD use a time-weighted algorithm.
11/17/2025open-telemetry/opentelemetry-specificationreleasedBy @carlosalberto

OTEP: Recording exceptions as log records

Related to https://github.com/open-telemetry/semantic-conventions/issues/1536

Changes

11/11/2025open-telemetry/opentelemetry-specificationclosedBy @lmolkova

2025.10

What's Changed

  • Auto-update registry versions (f0b98db2abbcc29a2924b1332bd9ce770ca9610b) by @otelbot[bot] in https://github.com/open-telemetry/opentelemetry.io/pull/7948
  • Refcache refresh by @chalin in https://github.com/open-telemetry/opentelemetry.io/pull/7951
10/31/2025open-telemetry/opentelemetry.ioreleasedBy @theletterf

v1.9.0

Added

  • profiles: drop field profile.comment_strindices. [#729](https://github.com/open-telemetry/opentelemetry-proto/pull/729)
10/31/2025open-telemetry/opentelemetry-protoreleasedBy @lmolkova

v1.38.0

🛑 Breaking changes 🛑

  • k8s: Rename k8s.node.allocatable.* metrics to k8s.node.*.allocatable ([#2973](https://github.com/open-telemetry/semantic-conventions/issues/2973))
10/29/2025open-telemetry/semantic-conventionsreleasedBy @lmolkova

Recommend using a time-unbiased reservoir sampling algorithm for histograms

Fixes https://github.com/open-telemetry/opentelemetry-specification/issues/4675

Changes

10/28/2025open-telemetry/opentelemetry-specificationmergedBy @dashpole
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