OpenTelemetry Python API
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License
Apache-2.0
Changelog
* Sun Nov 01 2026 Martin Pluskal <mpluskal@suse.com>
- Update to 1.45.1:
* Make AnyValue and AttributeValue explicit type aliases.
* Fix quadratic-time parsing of the tracestate header and
discard headers longer than 8192 characters.
* CVE-2026-114603: denial of service via unbounded whitespace
matching in TraceState.from_header (boo#1287483)
* Sat Sep 26 2026 ecsos <ecsos@opensuse.org>
- Update to 1.45.0
* Added
- opentelemetry-exporter-prometheus: add support to configure Resource attributes as metric labels (#5122)
- infra: add renovate (#5202)
- opentelemetry-api, opentelemetry-sdk: add support for extended attribute values everywhere. (#5266)
- opentelemetry-sdk: wire the top-level log_level field in declarative configuration — when set,
maps the OTel SeverityNumber value to a Python logging level and applies it to the opentelemetry logger
so SDK internal diagnostics respect the configured severity. (#5351)
- opentelemetry-sdk: add the new stable AlwaysRecordSampler (#5354)
- opentelemetry-configuration, opentelemetry-sdk: wire top-level attribute_limits into per-signal providers via declarative config;
add log_record_limits support to LoggerProvider (#5365)
- opentelemetry-exporter-otlp-json-http: add OTLP JSON HTTP exporter package (#5374)
- opentelemetry-api, opentelemetry-sdk: add enabled() support to the Logger API, SDK, and LogRecordProcessor
to let instrumentation skip expensive work when logging is disabled (#5380)
- opentelemetry-exporter-otlp-json-file: add OTLP JSON file Docker tests (#5412)
- opentelemetry-configuration: wire the experimental tracer_configurator/development, meter_configurator/development and
logger_configurator/development fields into create_tracer_provider, create_meter_provider and create_logger_provider,
so per-instrumentation-scope enabled overrides declared in the config file are applied to the provider (previously these fields were parsed but silently discarded).
The logger minimum_severity/trace_based fields are not supported by the Python SDK and are ignored with a warning. (#5418)
- docs/examples: add example on how to manually setup the SDK to get SDK metrics (#5449)
- opentelemetry-docker-tests: add Prometheus exporter docker tests (#5457)
- opentelemetry-sdk: count records dropped after shutdown on otel.sdk.processor.{span,log}.processed with error.type=already_shutdown (batch span/log and simple log processors),
which the semantic conventions define as a valid value for this metric. (#5509)
- opentelemetry-semantic-conventions: update semantic conventions to v1.44.0 (#5511)
- opentelemetry-sdk: add host.id to the host resource detector (#5653)
- opentelemetry-test-utils: add CapturingSampler to record what samplers receive in instrumentation tests (#5681)
* Changed
- Enable PIE (flake8-pie) ruff rule and fix all violations (#5150)
- The public opentelemetry.util.types.AttributeValue type in package opentelemetry-api is being expanded to include None,
heterogeneous sequences of primitive types (and nested sequences) as opposed to only homogeneous primitive sequences,
and Mappings of strings to any primitive types or sequences/mappings (which themselves must only contain primitive types
or sequences/mappings validated the same way). If a bytes type is set as an attribute value in the SDK,
it will no longer be utf-8 decoded to a string, instead it will be passed along as is in accordance with the OTEL spec,
since bytes is a valid type in the OTLP proto. (#5266)
- opentelemetry-exporter-otlp-proto-http: add a max_request_size argument to the OTLP HTTP exporters (traces, logs, metrics);
serialized requests larger than the limit are dropped before sending, measured before compression.
Defaults to 64 MiB (enabled); set to 0 to disable. Mirrors opentelemetry-go#8157. (#5369)
- [BREAKING] opentelemetry-api: subclasses of Logger need to implement the enabled method (#5380)
- opentelemetry-exporter-otlp-proto-http: refactor to use shared opentelemetry-exporter-otlp-common
and opentelemetry-exporter-http-transport packages and switch default HTTP backend to urllib3 (#5389)
- opentelemetry-sdk: unify logging force_flush timeout defaults to 30000ms (#5438)
- opentelemetry-python: enable Ruff default ruleset and fix auto-fixable lint issues (#5491)
- opentelemetry-sdk: SimpleSpanProcessor now drops spans ended after shutdown() instead of passing them to the exporter,
and counts them on otel.sdk.processor.span.processed with error.type=already_shutdown. (#5512)
- Bump pytest to 9.0.3 (#5518)
- opentelemetry-exporter-otlp-proto-http: clarify that the endpoint= kwarg requires the full signal path (#5633)
- opentelemetry-sdk: fix typos in SpanLimits docstring (#5658)
* Fixed
- opentelemetry-configuration: perform environment variable substitution on scalar values after parsing the configuration file,
so ${VAR} references inside comments and mapping keys are no longer substituted and undefined references in comments no longer abort loading (#5407)
- opentelemetry-configuration: declarative config environment variable substitution now replaces an unset variable
that has no default with an empty value instead of raising an error, per the configuration spec.
Resource attributes whose value resolves to null (an unset ${VAR} with no default) are skipped with a warning instead of being inserted as a null value. (#5408)
- 'scripts/build.sh: add opentelemetry-configurationandopentelemetry-proto-json` to the package to release (#5425)
- opentelemetry-sdk: fix View instrument-name matching so a view configured with an instrument's real (mixed-case) name is applied;
matching is now case-insensitive and platform-independent instead of relying on fnmatch's OS-dependent case handling (#5430)
- opentelemetry-sdk: fix missing f-prefix in exponential histogram error messages (#5434)
- opentelemetry-configuration: resolve false-positive warning logs for newer schema minor version (#5436)
- opentelemetry-sdk: make methods on FixedSizeExemplarReservoirABC thread safe (#5437)
- opentelemetry-propagator-jaeger: fix typing issues and enable pyright typechecking for the package opentelemetry-propagator-jaeger:
skip uberctx- baggage headers with an empty value on extraction instead of raising TypeError (#5440)
- opentelemetry-sdk: fix TypeError when instantiating a _BaseConfigurator subclass whose __init__ takes arguments (#5441)
- opentelemetry-sdk: fix TypeError in os.fork() when a BatchProcessor or PeriodicExportingMetricReader is garbage collected (#5453)
- opentelemetry-configuration: a declarative config key present with an empty (null) value on an object-typed node (e.g. always_on:,
a - service: detector, or a metric console: exporter) is now treated the same as an explicit empty config (always_on: {})
instead of failing type dispatch or silently skipping the node. Both dict-typed nodes and dataclasses constructible with no arguments are covered. (#5454)
- opentelemetry-api: fix copy-pasted log message in SpanContext.__delattr__ (#5455)
- opentelemetry-sdk: reject views with ExponentialBucketHistogramAggregation for asynchronous instruments instead of silently producing no data (#5461)
- opentelemetry-sdk: fill every bucket of SimpleFixedSizeExemplarReservoir before random sampling (#5462)
- opentelemetry-sdk: Import code_attributes from stable semconv package (#5465)
- `opentelemetry-...
- Changes from 1.44.0
* Added
- opentelemetry-docker-tests: Refactor Docker tests to properly validate contents of exported telemetry (#5220)
- opentelemetry-exporter-otlp-common: add shared package for common OTLP utilities (#5252)
- opentelemetry-sdk: add MissingDependencyError exception for declarative configuration and use it for missing optional dependency errors (#5265)
- opentelemetry-sdk: Add ability to refresh process dependent Resource attributes (#5280)
- opentelemetry-sdk: add force_flush method to LogRecordExporter ABC (#5294)
- opentelemetry-sdk: Make it possible to limit the size of stored spans in InMemorySpanExporter (#5296)
- opentelemetry-sdk: add log record limits environment variables OTEL_LOGRECORD_ATTRIBUTE_COUNT_LIMIT and OTEL_LOGRECORD_ATTRIBUTE_VALUE_LENGTH_LIMIT (#5300)
- opentelemetry-sdk: add support for file exporter with declarative config (#5311)
- opentelemetry-sdk: expose SynchronousMultiLogRecordProcessor and