●Change8

Migrating to OpenTelemetry Python v1.35.0

Version v1.35.0 introduces 1 breaking change. This guide details how to update your code.

Released: 7/11/2025

1
Breaking Changes
2
Migration Steps
5
Affected Symbols

⚠️ Check Your Code

If you use any of these symbols, you need to read this guide:

LogRecordProcessor.emitLogRecordProcessor.on_emitLogging API (log creation methods)BatchSpanProcessorConsoleLogExporter.export

Breaking Changes

●Issue #1

The method `LogRecordProcessor.emit` has been renamed to `on_emit`. Users relying on reflection or direct calls to `emit` must update their code to use `on_emit` instead.

Migration Steps

  1. 1
    If you were calling `LogRecordProcessor.emit`, change calls to `LogRecordProcessor.on_emit`.
  2. 2
    When creating logs, migrate from passing explicit `trace_id`, `span_id`, and `trace_flags` arguments to passing an optional `context` object. ([#4597], [#4668])

Release Summary

This release stabilizes the Log signal with several breaking changes and deprecations, including renaming `LogRecordProcessor.emit` to `on_emit` and deprecating explicit trace context arguments in favor of a context object for logging. It also updates OTLP exporters with improved timeout handling and jitter.

Need More Details?

View the full release notes and all changes for OpenTelemetry Python v1.35.0.

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