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Changelog

This file contains individual changes for the OpenTelemetry.Exporter.OpenTelemetryProtocol package. For highlights and announcements covering all components see: Release Notes.

Unreleased

  • Fixed a bug in .NET Framework gRPC export client where the default success export response was incorrectly marked as false, now changed to true, ensuring exports are correctly marked as successful. (#6099)

1.11.1

Released 2025-Jan-22

  • Fixed an issue where the OTLP gRPC exporter did not export logs, metrics, or traces in .NET Framework projects. (#6083)

1.11.0

Released 2025-Jan-15

1.11.0-rc.1

Released 2024-Dec-11

  • Removed the following package references:

    • Google.Protobuf
    • Grpc
    • Grpc.Net.Client

    These changes were made to streamline dependencies and reduce the footprint of the exporter. (#6005)

  • Switched from using the Google.Protobuf library for serialization to a custom manual implementation of protobuf serialization. (#6005)

  • Fixed an issue where a service.name was added to the resource if it was missing. The exporter now respects the resource data provided by the SDK without modifications. (#6015)

  • Removed the peer service resolver, which was based on earlier experimental semantic conventions that are not part of the stable specification. This change ensures that the exporter no longer modifies or assumes the value of peer service attributes, aligning it more closely with OpenTelemetry protocol specifications. (#6005)

1.10.0

Released 2024-Nov-12

1.10.0-rc.1

Released 2024-Nov-01

  • Added support for exporting instrumentation scope attributes from ActivitySource.Tags. (#5897)

1.10.0-beta.1

Released 2024-Sep-30

  • Breaking change: Non-primitive attribute (logs) and tag (traces) values converted using Convert.ToString will now format using CultureInfo.InvariantCulture. (#5700)

  • Fixed an issue causing NotSupportedExceptions to be thrown on startup when AddOtlpExporter registration extensions are called while using custom dependency injection containers which automatically create services (Unity, Grace, etc.). (#5808)

    • Fixed PlatformNotSupportedExceptions being thrown during export when running on mobile platforms which caused telemetry to be dropped silently. (#5821)

1.9.0

Released 2024-Jun-14

1.9.0-rc.1

Released 2024-Jun-07

  • The experimental APIs previously covered by OTEL1000 (LoggerProviderBuilder.AddOtlpExporter extension) are now part of the public API and supported in stable builds. (#5648)

1.9.0-alpha.1

Released 2024-May-20

  • User-Agent header format changed from OTel-OTLP-Exporter-Dotnet/{NuGet Package Version}+{Commit Hash} to OTel-OTLP-Exporter-Dotnet/{NuGet Package Version}. (#5528)

  • Implementation of OTLP specification for propagating Span and SpanLink flags containing W3C trace flags and parent_is_remote information. (#5563)

  • Introduced experimental support for automatically retrying export to the otlp endpoint by storing the telemetry offline during transient network errors. Users can enable this feature by setting the OTEL_DOTNET_EXPERIMENTAL_OTLP_RETRY environment variable to disk. The default path where the telemetry is stored is obtained by calling Path.GetTempPath() or can be customized by setting OTEL_DOTNET_EXPERIMENTAL_OTLP_DISK_RETRY_DIRECTORY_PATH environment variable. (#5527)

1.8.1

Released 2024-Apr-17

  • Fix native AoT warnings in OpenTelemetry.Exporter.OpenTelemetryProtocol. (#5520)

1.8.0

Released 2024-Apr-02

  • OtlpExporter will no longer throw an exception (even on .NET Core 3.1) when the System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport AppContext switch is NOT set AND using OtlpExportProtocol.Grpc to send to an insecure ("http") endpoint. System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport is not required to be set when using .NET 5 or newer. (#5486)

  • Replaced environment variable OTEL_DOTNET_EXPERIMENTAL_OTLP_ENABLE_INMEMORY_RETRY with OTEL_DOTNET_EXPERIMENTAL_OTLP_RETRY. OTEL_DOTNET_EXPERIMENTAL_OTLP_RETRY when set to in_memory will enable automatic retries in case of transient failures during data export to an OTLP endpoint. (#5495)

1.8.0-rc.1

Released 2024-Mar-27

1.8.0-beta.1

Released 2024-Mar-14

  • Experimental (pre-release builds only): Added LoggerProviderBuilder.AddOtlpExporter registration extensions. #5103

  • Removed the OTEL_DOTNET_EXPERIMENTAL_OTLP_EMIT_EXCEPTION_LOG_ATTRIBUTES environment variable, following the stabilization of the exception attributes exception.type, exception.message, and exception.stacktrace in the OpenTelemetry Semantic Conventions. These attributes, corresponding to LogRecord.Exception, are now stable and will be automatically included in exports. (#5258)

  • Updated OtlpLogExporter to set body on the data model from LogRecord.Body if {OriginalFormat} attribute is NOT found and FormattedMessage is null. This is typically the case when using the experimental Logs Bridge API. (#5268)

  • Updated OtlpLogExporter to set instrumentation scope name on the data model from LogRecord.Logger.Name if LogRecord.CategoryName is null. This is typically the case when using the experimental Logs Bridge API. (#5300)

  • URL encoded values in OTEL_EXPORTER_OTLP_HEADERS are now correctly decoded as it is mandated by the specification. (#5316)

  • Experimental (pre-release builds only): Add support in OtlpMetricExporter for emitting exemplars supplied on Counters, Gauges, and ExponentialHistograms. (#5397)

  • Setting Endpoint or HttpClientFactory properties on OtlpExporterOptions to null will now result in an ArgumentNullException being thrown. (#5434)

  • Introduced experimental support for automatically retrying export to the otlp endpoint when transient network errors occur. Users can enable this feature by setting OTEL_DOTNET_EXPERIMENTAL_OTLP_ENABLE_INMEMORY_RETRY environment variable to true. (#5435)

  • Added IOpenTelemetryBuilder.UseOtlpExporter extension to simplify setup of the OTLP Exporter when all three signals are used (logs, metrics, and traces). The new extension has the following behaviors:

    • Calling UseOtlpExporter will automatically enable logging, tracing, and metrics. Additional calls to WithLogging, WithMetrics, and WithTracing are NOT required however for metrics and tracing sources/meters still need to be enabled.

    • UseOtlpExporter can only be called once and cannot be used with the existing AddOtlpExporter extensions. Extra calls will result in NotSupportedExceptions being thrown.

    • UseOtlpExporter will register the OTLP Exporter at the end of the processor pipeline for logging and tracing.

    • The OTLP Exporters added for logging, tracing, and metrics can be configured using environment variables or IConfiguration.

    For details see: README > Enable OTLP Exporter for all signals.

    PR: #5400

1.7.0

Released 2023-Dec-08

1.7.0-rc.1

Released 2023-Nov-29

  • Made OpenTelemetry.Exporter.OtlpLogExporter public. (#4979)

  • Updated the OpenTelemetryLoggerOptions.AddOtlpExporter extension to retrieve OtlpExporterOptions and LogRecordExportProcessorOptions using the IServiceProvider / Options API so that they can be controlled via IConfiguration (similar to metrics and traces). (#4916)

  • Added an OpenTelemetryLoggerOptions.AddOtlpExporter extension overload which accepts a name parameter to support named options. (#4916)

  • Add support for Instrumentation Scope Attributes (i.e Meter Tags), fixing issue #4563. (#5089)

1.7.0-alpha.1

Released 2023-Oct-16

  • Bumped the version of Google.Protobuf used by the project to 3.22.5 so that consuming applications can be published as NativeAOT successfully. Also, a new performance feature can be used instead of reflection emit, which is not AOT-compatible. Removed the dependency on System.Reflection.Emit.Lightweight. (#4859)

  • Added support for OTEL_LOGRECORD_ATTRIBUTE_VALUE_LENGTH_LIMIT and OTEL_LOGRECORD_ATTRIBUTE_COUNT_LIMIT. (#4887)

  • Added ability to export attributes corresponding to LogRecord.Exception i.e. exception.type, exception.message and exception.stacktrace. These attributes will be exported when OTEL_DOTNET_EXPERIMENTAL_OTLP_EMIT_EXCEPTION_LOG_ATTRIBUTES environment variable will be set to true.

    NOTE: These attributes were removed in 1.6.0-rc.1 release in order to support stable release of OTLP Log Exporter. The attributes will now be available via environment variable mentioned above. (#4892)

  • Added ability to export attributes corresponding to LogRecord.EventId.Id as logrecord.event.id and LogRecord.EventId.Name as logrecord.event.name. The attributes will be exported when OTEL_DOTNET_EXPERIMENTAL_OTLP_EMIT_EVENT_LOG_ATTRIBUTES will be set to true.

    NOTE: These attributes were removed in 1.6.0-rc.1 release in order to support stable release of OTLP Log Exporter. The attributes will now be available via environment variable mentioned above. (#4925)

  • LogRecord.CategoryName will now be exported as InstrumentationScope name field under ScopeLogs. (#4941)

1.6.0

Released 2023-Sep-05

1.6.0-rc.1

Released 2023-Aug-21

  • Breaking change: Excluded attributes corresponding to LogRecord.Exception, LogRecord.EventId and LogRecord.CategoryName from the exported data. See following details for reasoning behind removing each individual property:

    • LogRecord.Exception: The semantic conventions for attributes corresponding to exception data are not yet stable. Track issue #4831 for details.
    • LogRecord.EventId: The attributes corresponding to this property are specific to .NET logging data model and there is no established convention defined for them yet. Track issue #4776 for details.
    • LogRecord.CategoryName: The attribute corresponding to this property is specific to .NET logging data model and there is no established convention defined for it yet. Track issue #3491 for details.

    This change is temporarily done in order to release stable version of OTLP Log Exporter. (#4781)

  • Added extension method for configuring export processor options for otlp log exporter. (#4733)

  • Added support for configuring the metric exporter's temporality using the environment variable OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE as defined in the specification. (#4667)

1.6.0-alpha.1

Released 2023-Jul-12

  • Merged OpenTelemetry.Exporter.OpenTelemetryProtocol.Logs package into OpenTelemetry.Exporter.OpenTelemetryProtocol. Going Forward, OpenTelemetry.Exporter.OpenTelemetryProtocol will be the only package needed for all 3 signals (Logs, Metrics, and Traces). All the changes made in OpenTelemetry.Exporter.OpenTelemetryProtocol.Logs are now included in this package. (#4556)

  • Updated Grpc.Net.Client to 2.45.0 to fix unobserved exception from failed calls. (#4573)

  • Updated Grpc.Net.Client to 2.52.0 to address the vulnerability reported by CVE-2023-32731. Refer to grpc/grpc#32309 for more details. (#4647)

  • Experimental (pre-release builds only):

    • Note: See #4735 for the introduction of experimental api support.

    • Add back support for Exemplars. See exemplars for instructions to enable exemplars. (#4553)

    • Updated to support Severity and SeverityText when exporting LogRecords. (#4568)

1.5.1

Released 2023-Jun-26

1.5.0

Released 2023-Jun-05

  • Remove support for exporting Exemplars. This would be added back in the 1.6.* prerelease versions right after 1.5.0 stable version is released. (#4533)

1.5.0-rc.1

Released 2023-May-25

  • Revert version of Google.Protobuf to 3.19.4 (see #4201). This also reintroduces the System.Reflection.Emit.Lightweight dependency. (#4407)

1.5.0-alpha.2

Released 2023-Mar-31

1.5.0-alpha.1

Released 2023-Mar-07

  • Bumped the version of Google.Protobuf used by the project to 3.22.0 so that a new performance feature can be used instead of reflection. Removed the dependency on System.Reflection.Emit.Lightweight. (#4201)

  • Added Exemplar support. See exemplars for instructions to enable exemplars.

1.4.0

Released 2023-Feb-24

  • Updated OTel SDK dependency to 1.4.0

  • AddOtlpExporter extension methods will now always create a new options instance when named options are NOT used. (#4200)

1.4.0-rc.4

Released 2023-Feb-10

  • Added a direct dependency on System.Reflection.Emit.Lightweight which previously came transitively through the OpenTelemetry SDK. (#4140)

1.4.0-rc.3

Released 2023-Feb-01

1.4.0-rc.2

Released 2023-Jan-09

  • For AddOtlpExporter extension methods, configuration delegates will be executed inline and not through Options API when named options are NOT used. (#4058)

1.4.0-rc.1

Released 2022-Dec-12

  • Fix default values for OTEL_ATTRIBUTE_COUNT_LIMIT, OTEL_ATTRIBUTE_COUNT_LIMIT, OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT, OTEL_SPAN_EVENT_COUNT_LIMIT, OTEL_SPAN_LINK_COUNT_LIMIT, OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT, OTEL_LINK_ATTRIBUTE_COUNT_LIMIT. All of them are defaulted to 128. (#3978)

1.4.0-beta.3

Released 2022-Nov-07

  • Log Exporter modified to no longer prefix scope-depth when exporting ILogger scopes as attributes. Empty keys and {OriginalFormat} key will be ignored from scopes. (#3843)

1.4.0-beta.2

Released 2022-Oct-17

  • OTLP histogram data points will now include Min and Max values when they are present. (#2735)

  • Adds support for limiting the length and count of attributes exported from the OTLP log exporter. These Attribute Limits are configured via the environment variables defined in the specification. (#3684)

  • Added support for loading environment variables from IConfiguration when using the AddOtlpExporter extensions (#3760)

1.4.0-beta.1

Released 2022-Sep-29

  • Added overloads which accept a name to the MeterProviderBuilder AddOtlpExporter extension to allow for more fine-grained options management (#3648)

  • Added overloads which accept a name to the TracerProviderBuilder AddOtlpExporter extension to allow for more fine-grained options management (#3653)

1.4.0-alpha.2

Released 2022-Aug-18

1.4.0-alpha.1

Released 2022-Aug-02

  • Adds support for limiting the length and count of attributes exported from the OTLP exporter. These Attribute Limits are configured via the environment variables defined in the specification. (#3376)

  • The MetricReaderOptions defaults can be overridden using OTEL_METRIC_EXPORT_INTERVAL and OTEL_METRIC_EXPORT_TIMEOUT environmental variables as defined in the specification. (#3424)

1.3.0

Released 2022-Jun-03

1.3.0-rc.2

Released 2022-June-1

1.3.0-beta.2

Released 2022-May-16

  • LogExporter to support Logging Scopes. (#3218)

  • Support HttpProtobuf protocol with logs & added HttpClientFactory option (#3225)

  • Removes net5.0 target and replaced with net6.0 as .NET 5.0 is going out of support. The package keeps netstandard2.1 target, so it can still be used with .NET5.0 apps. (#3147)

  • Fix handling of array-valued attributes for the OTLP trace exporter. (#3238)

  • Improve the conversion and formatting of attribute values to the OTLP format. The list of data types that must be supported per the OpenTelemetry specification is more narrow than what the .NET OpenTelemetry SDK supports. Numeric built-in value types are supported by converting to a long or double as appropriate except for numeric types that could cause overflow (ulong) or rounding (decimal) which are converted to strings. Non-numeric built-in types - string, char, bool are supported. All other types are converted to a string. Array values are also supported. (#3262) (#3274)

1.3.0-beta.1

Released 2022-Apr-15

  • Removes .NET Framework 4.6.1. The minimum .NET Framework version supported is .NET 4.6.2. (#3190)

1.2.0

Released 2022-Apr-15

  • LogExporter to correctly map Severity to OTLP. (#3177)

  • LogExporter to special case {OriginalFormat} to populate Body. (#3182)

1.2.0-rc5

Released 2022-Apr-12

  • Updated underlying proto files to v0.16.0. The LogRecord.Name field was removed. The CategoryName provided when calling CreateLogger previously populated this field. For now, CategoryName is no longer exported via OTLP. It will be reintroduced in the future as an attribute.

1.2.0-rc4

Released 2022-Mar-30

  • Added support for Activity Status and StatusDescription which were added to Activity from System.Diagnostics.DiagnosticSource version 6.0. Prior to version 6.0, setting the status of an Activity was provided by the .NET OpenTelemetry API via the Activity.SetStatus extension method in the OpenTelemetry.Trace namespace. Internally, this extension method added the status as tags on the Activity: otel.status_code and otel.status_description. Therefore, to maintain backward compatibility, the exporter falls back to using these tags to infer status. (#3100)

  • Fixed OTLP metric exporter to default to a periodic 60 second export cycle. A bug was introduced in #2717 that caused the OTLP metric export to default to a manual export cycle (i.e., requiring an explicit flush). A workaround for this bug has been provided here. (#2982)

  • Bumped minimum required gRPC version (2.23.0 to 2.44.0). Fixes issues building on Apple Silicon (M1). (#2963)

  • Fixed issue where the configuration of an OTLP exporter could be changed after instantiation by altering the original OtlpExporterOptions provided. (#3066)

  • TraceExporter to stop populating DeprecatedCode in OTLP Status.

1.2.0-rc3

Released 2022-Mar-04

  • LogExporter bug fix to handle null EventName. (#2871)

  • Fixed the default endpoint for OTLP exporter over HTTP/Protobuf. The default value is http://localhost:4318. (#2868)

  • Removes metric related configuration options from OtlpExporterOptions. MetricReaderType, PeriodicExporterMetricReaderOptions, and Temporality are now configurable via the MetricReaderOptions. (#2717)

  • Exporter bug fix to not throw exceptions from Export method. (#2915)

  • OTLP LogExporter modified to not drop the whole batch if a single log from the batch is invalid. (#2934)

1.2.0-rc2

Released 2022-Feb-02

  • Added validation that insecure channel is configured correctly when using .NET Core 3.x for gRPC-based exporting. (#2691)

  • Changed OtlpLogExporter to convert ILogger structured log inputs to Attributes in OpenTelemetry (only active when ParseStateValues is true on OpenTelemetryLoggerOptions)

1.2.0-rc1

Released 2021-Nov-29

  • Added configuration options for MetricReaderType to allow for configuring the OtlpMetricExporter to export either manually or periodically. (#2674)

  • The internal log message used when OTLP export client connection failure occurs, will now include the endpoint uri as well. (#2686)

  • Support HttpProtobuf protocol with metrics & added HttpClientFactory option (#2696)

1.2.0-beta2

Released 2021-Nov-19

  • Changed OtlpExporterOptions constructor to throw FormatException if it fails to parse any of the supported environment variables.

  • Changed OtlpExporterOptions.MetricExportIntervalMilliseconds to default 60000 milliseconds. (#2641)

1.2.0-beta1

Released 2021-Oct-08

  • MeterProviderBuilder extension methods now support OtlpExporterOptions bound to IConfiguration when using OpenTelemetry.Extensions.Hosting (#2413)
  • Extended OtlpExporterOptions by Protocol property. The property can be overridden by OTEL_EXPORTER_OTLP_PROTOCOL environmental variable (grpc or http/protobuf). Implemented OTLP over HTTP binary protobuf trace exporter. (#2292)

1.2.0-alpha4

Released 2021-Sep-23

1.2.0-alpha3

Released 2021-Sep-13

  • OtlpExporterOptions.BatchExportProcessorOptions is initialized with BatchExportActivityProcessorOptions which supports field value overriding using OTEL_BSP_SCHEDULE_DELAY, OTEL_BSP_EXPORT_TIMEOUT, OTEL_BSP_MAX_QUEUE_SIZE, OTEL_BSP_MAX_EXPORT_BATCH_SIZE environmental variables as defined in the specification. (#2219)

1.2.0-alpha2

Released 2021-Aug-24

  • The OtlpExporterOptions defaults can be overridden using OTEL_EXPORTER_OTLP_ENDPOINT, OTEL_EXPORTER_OTLP_HEADERS and OTEL_EXPORTER_OTLP_TIMEOUT environmental variables as defined in the specification. (#2188)

  • Changed default temporality for Metrics to be cumulative.

1.2.0-alpha1

Released 2021-Jul-23

  • Removes .NET Framework 4.5.2, .NET 4.6 support. The minimum .NET Framework version supported is .NET 4.6.1. (#2138)

  • Add Metrics support.(#2174)

1.1.0

Released 2021-Jul-12

1.1.0-rc1

Released 2021-Jun-25

1.1.0-beta4

Released 2021-Jun-09

1.1.0-beta3

Released 2021-May-11

1.1.0-beta2

Released 2021-Apr-23

  • Resolves System.TypeInitializationException exception when using the exporter with an application that references Google.Protobuf 3.15. The OTLP exporter now depends on Google.Protobuf 3.15.5 enabling the use of the new UnsafeByteOperations.UnsafeWrap to avoid unnecessary allocations. (#1873)

  • Null values in string arrays are preserved according to spec. (#1919 #1945)

  • When using OpenTelemetry.Extensions.Hosting you can now bind OtlpExporterOptions to IConfiguration using the Configure extension (ex: services.Configure<OtlpExporterOptions>(this.Configuration.GetSection("Otlp"));). (#1942)

1.1.0-beta1

Released 2021-Mar-19

1.0.1

Released 2021-Feb-10

1.0.0-rc4

Released 2021-Feb-09

  • Add back support for secure gRPC connections over https. (#1804)

1.0.0-rc3

Released 2021-Feb-04

  • Moved OtlpTraceExporter and OtlpExporterOptions classes to OpenTelemetry.Exporter namespace. (#1770)
  • Changed default port for OTLP Exporter from 55680 to 4317
  • Default ServiceName, if not found in Resource, is obtained from SDK using GetDefaultResource().
  • Modified the data type of Headers option to string; Added a new option called TimeoutMilliseconds for computing the deadline to be used by gRPC client for Export (#1781)
  • Removes Grpc specific options from OTLPExporterOptions, which removes support for secure connections. See 1778 for details.
  • Endpoint is made Uri for all target frameworks.

1.0.0-rc2

Released 2021-Jan-29

  • Changed OtlpTraceExporter class and constructor from internal to public. (#1612)

  • In OtlpExporterOptions.cs: Exporter options now include a switch for Batch vs Simple exporter, and settings for batch exporting properties.

  • Introduce a netstandard2.1 build enabling the exporter to use the gRPC for .NET library instead of the gRPC for C# library for .NET Core 3.0+ applications. This required some breaking changes to the OtlpExporterOptions. (#1662)

1.0.0-rc1.1

Released 2020-Nov-17

  • Code generated from proto files has been marked internal. This includes everything under the OpenTelemetry.Proto namespace. (#1524)
  • The OtlpExporter class has been made internal. (#1528)
  • Removed ServiceName from options available on the AddOtlpExporter extension. It is not required by the specification. (#1557)

0.8.0-beta.1

Released 2020-Nov-5

  • peer.service tag is now added to outgoing spans (went not already specified) following the Zipkin remote endpoint rules (#1392)
  • Added ServiceName to options available on the AddOtlpExporter extension (#1420)

0.7.0-beta.1

Released 2020-Oct-16

0.6.0-beta.1

Released 2020-Sep-15

0.5.0-beta.2

Released 2020-08-28

  • Allow configurable gRPC channel options (#1033)
  • Renamed extension method from UseOtlpExporter to AddOtlpExporter (#1066)
  • Changed OtlpExporter to use BatchExportActivityProcessor by default (#1104)

0.4.0-beta.2

Released 2020-07-24

  • First beta release

0.3.0-beta

Released 2020-07-23

  • Initial release