●Change8

Migrating to OpenTelemetry 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, use the optional `context` argument instead of passing `trace_id`, `span_id`, or `trace_flags` directly. ([#4597], [#4668])

Release Summary

This release stabilizes the Log signal by introducing `event_name` for events and deprecating direct trace context fields in favor of a context object for log initialization. It also includes several fixes and updates to exporters and SDK components.

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

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