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v0.159.0Observability
Aug 17, 2026

CHECK 2OTHER 6

A release with an exporter queue batching feature gate, revised exporter and scraper metric behavior, and breaking public API field-shape changes. No security advisories or security fixes are disclosed.

Check if affected (2)

  • breakingThe confighttp.ServerConfig field shape

    Applies if you configure extension/zpages.

    In extension/zpages, confighttp.ServerConfig is now a named field of Config rather than an embedded field.

  • breakingThe configauth.Config field shape

    Applies if you use authentication configuration in pkg/confighttp.

    In pkg/confighttp, configauth.Config is now a named field of AuthConfig rather than an embedded field.

All 6 other recorded changesvalue changes 4 · additions 2

value changes (4)

  • Previously the batch send size histograms were recorded at enqueue time (Offer), so they measured incoming request sizes rather than the post-batching request handed to the downstream sender. Those histograms are now recorded in the obs report sender.
  • - pkg/scraperhelper: Use {record} instead of {datapoint} as the unit of the log record and profile record scraper metrics (#15730) Affects otelcol_scraper_scraped_log_records, otelcol_scraper_errored_log_records, otelcol_scraper_scraped_profile_records and otelcol_scraper_errored_profile_records.
  • - pkg/config/configretry: Migrate BackOffConfig to schema-based configuration generated by mdatagen. (#15502)
  • - pkg/config/configtls: Migrate TLS core types to schema-based configuration generated by mdatagen. (#15693)

additions (2)

  • - pkg/exporterhelper: Add the pkg.exporterhelper.queueBatchEnabled feature gate (#14038, #13582, #12022) When enabled, the batch settings returned by NewDefaultQueueConfig() have batch::enabled true. See [migration RFC](https://github.com/open-telemetry/opentelemetry-collector/blob/main/docs/rfcs/batching-migration.md#phase-1).
  • The previous enqueue-time measurements are preserved under the new otelcol_exporter_enqueue_size and otelcol_exporter_enqueue_size_bytes metrics for queue sizing.
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