Version 1.28.1/0.49b1

This is a patch release on the previous 1.28.0/0.49b0 release, fixing the issue(s) below.

• Fix metrics export with exemplar and no context and filtering observable instruments (#4251)
• Fix recursion error with sdk disabled and handler added to root logger (#4259)

Version 1.28.0/0.49b0

• Removed superfluous py.typed markers and added them where they were missing (#4172)
• Include metric info in encoding exceptions (#4154)
• sdk: Add support for log formatting (#4137)
• sdk: Add Host resource detector (#4182)
• sdk: Implementation of exemplars (#4094)
• Implement events sdk (#4176)
• Update semantic conventions to version 1.28.0 (#4218)
• Add support to protobuf 5+ and drop support to protobuf 3 and 4 (#4206)
• Update environment variable descriptions to match signal (#4222)
• Record logger name as the instrumentation scope name (#4208)
• Fix memory leak in exporter and reader (#4224)
• Drop OTEL_PYTHON_EXPERIMENTAL_DISABLE_PROMETHEUS_UNIT_NORMALIZATION environment variable (#4217)

Version 1.27.0/0.48b0

• Implementation of Events API (#4054)
• Make log sdk add exception.message to logRecord for exceptions whose argument is an exception not a string message (#4122)
• Fix use of link.attributes.dropped, which may not exist (#4119)
• Running mypy on SDK resources (#4053)
• Added py.typed file to top-level module (#4084)
• Drop Final annotation from Enum in semantic conventions (#4085)
• Update log export example to not use root logger (#4090)
• sdk: Add OS resource detector (#3992)
• sdk: Accept non URL-encoded headers in OTEL_EXPORTER_OTLP_*HEADERS to match other languages SDKs (#4103)
• Update semantic conventions to version 1.27.0 (#4104)
• Add support to type bytes for OTLP AnyValue (#4128)
• Export ExponentialHistogram and ExponentialHistogramDataPoint (#4134)
• Implement Client Key and Certificate File Support for All OTLP Exporters (#4116)
• Remove _start_time_unix_nano attribute from _ViewInstrumentMatch in favor of using time_ns() at the moment when the aggregation object is created (#4137)

Version 1.26.0/0.47b0

• Standardizing timeout calculation in measurement consumer collect to nanoseconds (#4074)
• optional scope attributes for logger creation (#4035)
• optional scope attribute for tracer creation (#4028)
• OTLP exporter is encoding invalid span/trace IDs in the logs fix (#4006)
• Update sdk process resource detector process.command_args attribute to also include the executable itself (#4032)
• Fix start_time_unix_nano for delta collection for explicit bucket histogram aggregation (#4009)
• Fix start_time_unix_nano for delta collection for sum aggregation (#4011)
• Update opentracing and opencesus docs examples to not use JaegerExporter (#4023)
• Do not execute Flask Tests in debug mode (#3956)
• When encountering an error encoding metric attributes in the OTLP exporter, log the key that had an error. (#3838)
• Fix ExponentialHistogramAggregation (#3978)
• Log a warning when a LogRecord in sdk/log has dropped attributes due to reaching limits (#3946)
• Fix RandomIdGenerator can generate invalid Span/Trace Ids (#3949)
• Add Python 3.12 to tox (#3616)
• Improve resource field structure for LogRecords (#3972)
• Update Semantic Conventions code generation scripts: - fix namespace exclusion that resulted in dropping os and net namespaces. - add Final decorator to constants to prevent collisions - enable mypy and fix detected issues - allow to drop specific attributes in preparation for Semantic Conventions v1.26.0 (#3973)
• Update semantic conventions to version 1.26.0. (#3964)
• Use semconv exception attributes for record exceptions in spans (#3979)
• Fix _encode_events assumes events.attributes.dropped exists (#3965)
• Validate links at span creation (#3991)
• Add attributes field in MeterProvider.get_meter and InstrumentationScope (#4015)
• Fix inaccessible SCHEMA_URL constants in opentelemetry-semantic-conventions (#4069)

Version 1.25.0/0.46b0

• Fix class BoundedAttributes to have RLock rather than Lock (#3859)
• Remove thread lock by loading RuntimeContext explicitly. (#3763)
• Update proto version to v1.2.0 (#3844)
• Add to_json method to ExponentialHistogram (#3780)
• Bump mypy to 1.9.0 (#3795)
• Fix exponential histograms (#3798)
• Fix otlp exporter to export log_record.observed_timestamp (#3785)
• Add capture the fully qualified type name for raised exceptions in spans (#3837)
• Prometheus exporter sort label keys to prevent duplicate metrics when user input changes order (#3698)
• Update semantic conventions to version 1.25.0. Refactor semantic-convention structure: - SpanAttributes, ResourceAttributes, and MetricInstruments are deprecated. - Attribute and metric definitions are now grouped by the namespace. - Stable attributes and metrics are moved to opentelemetry.semconv.attributes and opentelemetry.semconv.metrics modules. - Stable and experimental attributes and metrics are defined under opentelemetry.semconv._incubating import path. (#3586)
• Rename test objects to avoid pytest warnings ([#3823] (#3823))
• Add span flags to OTLP spans and links (#3881)
• Record links with invalid SpanContext if either attributes or TraceState are not empty (#3917)
• Add OpenTelemetry trove classifiers to PyPI packages ([#3913] (#3913))
• Fix prometheus metric name and unit conversion (#3924) - this is a breaking change to prometheus metric names so they comply with the specification. - you can temporarily opt-out of the unit normalization by setting the environment variable OTEL_PYTHON_EXPERIMENTAL_DISABLE_PROMETHEUS_UNIT_NORMALIZATION=true - common unit abbreviations are converted to Prometheus conventions (s -> seconds), following the collector's implementation - repeated _ are replaced with a single _ - unit annotations (enclosed in curly braces like {requests}) are stripped away - units with slash are converted e.g. m/s -> meters_per_second. - The exporter's API is not changed
• Add parameters for Distros and configurators to configure autoinstrumentation in addition to existing environment variables. ([#3864] (#3864))

Version 1.24.0/0.45b0

• Make create_gauge non-abstract method (#3817)
• Make tracer.start_as_current_span() decorator work with async functions (#3633)
• Fix python 3.12 deprecation warning (#3751)
• bump mypy to 0.982 (#3776)
• Add support for OTEL_SDK_DISABLED environment variable (#3648)
• Fix ValueError message for PeriodicExportingMetricsReader (#3769)
• Use BaseException instead of Exception in record_exception (#3354)
• Make span.record_exception more robust (#3778)
• Fix license field in pyproject.toml files (#3803)

Version 1.23.0/0.44b0

• Use Attribute rather than boundattribute in logrecord (#3567)
• Fix flush error when no LoggerProvider configured for LoggingHandler (#3608)
• Fix OTLPMetricExporter ignores preferred_aggregation property (#3603)
• Logs: set observed_timestamp field (#3565)
• Add missing Resource SchemaURL in OTLP exporters (#3652)
• Fix loglevel warning text (#3566)
• Prometheus Exporter string representation for target_info labels (#3659)
• Logs: ObservedTimestamp field is missing in console exporter output (#3564)
• Fix explicit bucket histogram aggregation (#3429)
• Add code.lineno, code.function and code.filepath to all logs (#3645)
• Add Synchronous Gauge instrument (#3462)
• Drop support for 3.7 (#3668)
• Include key in attribute sequence warning (#3639)
• Upgrade markupsafe, Flask and related dependencies to dev and test environments (#3609)
• Handle HTTP 2XX responses as successful in OTLP exporters (#3623)
• Improve Resource Detector timeout messaging (#3645)
• Add Proxy classes for logging (#3575)
• Remove dependency on 'backoff' library (#3679)

Version 1.22.0/0.43b0

• Prometheus exporter sanitize info metric (#3572)
• Remove Jaeger exporters (#3554)
• Log stacktrace on UNKNOWN status OTLP export error (#3536)
• Fix OTLPExporterMixin shutdown timeout period (#3524)
• Handle taskName logrecord attribute (#3557)

Version 1.21.0/0.42b0

• Fix SumAggregation  (#3390)
• Fix handling of empty metric collection cycles (#3335)
• Fix error when no LoggerProvider configured for LoggingHandler (#3423)
• Make opentelemetry_metrics_exporter entrypoint support pull exporters (#3428)
• Allow instrument names to have '/' and up to 255 characters (#3442)
• Do not load Resource on sdk import (#3447)
• Update semantic conventions to version 1.21.0 (#3251)
• Add missing schema_url in global api for logging and metrics (#3251)
• Prometheus exporter support for auto instrumentation (#3413)

Version 1.20.0/0.41b0

• Modify Prometheus exporter to translate non-monotonic Sums into Gauges (#3306)