icerpc · pepone · Apr 27, 2026 · Apr 27, 2026 · Apr 27, 2026 · Apr 27, 2026
diff --git a/.vscode/cspell.json b/.vscode/cspell.json
@@ -30,6 +30,7 @@
     "globaltool",
     "icerpc",
     "Idempotency",
+    "jaegertracing",
     "localizable",
     "Memberwise",
     "meteo",

diff --git a/examples/protobuf/Telemetry/Client/Client.csproj b/examples/protobuf/Telemetry/Client/Client.csproj
@@ -14,7 +14,7 @@
     <PackageReference Include="IceRpc.Protobuf.Tools" Version="$(IceRpcVersion)" PrivateAssets="All" />
     <PackageReference Include="IceRpc.Protobuf" Version="$(IceRpcVersion)" />
     <PackageReference Include="IceRpc.Telemetry" Version="$(IceRpcVersion)" />
-    <PackageReference Include="OpenTelemetry.Exporter.Zipkin" Version="1.14.0" />
+    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.15.3" />
     <PackageReference Include="StyleCop.Analyzers" Version="$(StyleCopAnalyzersVersion)">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

diff --git a/examples/protobuf/Telemetry/Client/Program.cs b/examples/protobuf/Telemetry/Client/Program.cs
@@ -12,11 +12,11 @@
 using var activitySource = new ActivitySource("IceRpc");
 
 // Configure OpenTelemetry trace provider to subscribe to the activity source used by the IceRpc telemetry interceptor,
-// and to export the traces to the Zipkin service.
+// and to export the traces using the OpenTelemetry Protocol (OTLP).
 using TracerProvider? tracerProvider = Sdk.CreateTracerProviderBuilder()
    .AddSource(activitySource.Name)
    .SetResourceBuilder(ResourceBuilder.CreateDefault().AddService("Greeter Client"))
-   .AddZipkinExporter()
+   .AddOtlpExporter()
    .Build();
 
 // Load the test root CA certificate in order to connect to the server that uses a test server certificate.

diff --git a/examples/protobuf/Telemetry/README.md b/examples/protobuf/Telemetry/README.md
@@ -1,18 +1,23 @@
 # Telemetry
 
 This application illustrates how to use the IceRPC telemetry interceptor and middleware, and how they can be integrated
-with OpenTelemetry to export traces to Zipkin. The application also shows how the trace context is propagated from the
-client to the server, by just configuring the IceRPC telemetry interceptor and middleware.
+with OpenTelemetry to export traces over the OpenTelemetry Protocol (OTLP). The application also shows how the trace
+context is propagated from the client to the server, by just configuring the IceRPC telemetry interceptor and
+middleware.
 
 You can build the client and server applications with:
 
 ``` shell
 dotnet build
 ```
 
-First start the Zipkin service as documented in the Zipkin quick start guide:
+The example sends traces to an OTLP endpoint at `http://localhost:4317` (the default for `AddOtlpExporter`). Any
+OTLP-compatible collector or backend works; the simplest option is the Jaeger v2 single-binary container, which
+natively accepts OTLP and provides a web UI:
 
-- [Zipkin quick-start](https://zipkin.io/pages/quickstart.html)
+```shell
+docker run --rm --name jaeger -p 4317:4317 -p 16686:16686 jaegertracing/jaeger:2.17.0
+```
 
 In a separate terminal start the Greeter Server program:
 
@@ -28,8 +33,6 @@ cd Client
 dotnet run
 ```
 
-The trace information should now be available in the Zipkin local service:
-
-- <http://localhost:9411/zipkin>
+The trace information should now be available in the Jaeger UI:
 
-![Zipkin](./zipkin.png)
+- <http://localhost:16686>
diff --git a/examples/protobuf/Telemetry/Server/Program.cs b/examples/protobuf/Telemetry/Server/Program.cs
@@ -13,11 +13,11 @@
 using var activitySource = new ActivitySource("IceRpc");
 
 // Configure OpenTelemetry trace provider to subscribe to the activity source used by the IceRPC telemetry middleware,
-// and to export the traces to the Zipkin service.
+// and to export the traces using the OpenTelemetry Protocol (OTLP).
 using TracerProvider? tracerProvider = Sdk.CreateTracerProviderBuilder()
    .AddSource(activitySource.Name)
    .SetResourceBuilder(ResourceBuilder.CreateDefault().AddService("Greeter Server"))
-   .AddZipkinExporter()
+   .AddOtlpExporter()
    .Build();
 
 // The default transport (QUIC) requires a server certificate. We use a test certificate here.

diff --git a/examples/protobuf/Telemetry/Server/Server.csproj b/examples/protobuf/Telemetry/Server/Server.csproj
@@ -15,7 +15,7 @@
     <PackageReference Include="IceRpc.Protobuf.Tools" Version="$(IceRpcVersion)" PrivateAssets="All" />
     <PackageReference Include="IceRpc.Protobuf" Version="$(IceRpcVersion)" />
     <PackageReference Include="IceRpc.Telemetry" Version="$(IceRpcVersion)" />
-    <PackageReference Include="OpenTelemetry.Exporter.Zipkin" Version="1.14.0" />
+    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.15.3" />
     <PackageReference Include="StyleCop.Analyzers" Version="$(StyleCopAnalyzersVersion)">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

diff --git a/examples/protobuf/Telemetry/zipkin.png b/examples/protobuf/Telemetry/zipkin.png
diff --git a/examples/slice/Telemetry/Client/Client.csproj b/examples/slice/Telemetry/Client/Client.csproj
@@ -14,7 +14,7 @@
     <PackageReference Include="IceRpc.Slice.Tools" Version="$(IceRpcVersion)" PrivateAssets="All" />
     <PackageReference Include="IceRpc.Slice" Version="$(IceRpcVersion)" />
     <PackageReference Include="IceRpc.Telemetry" Version="$(IceRpcVersion)" />
-    <PackageReference Include="OpenTelemetry.Exporter.Zipkin" Version="1.14.0" />
+    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.15.3" />
     <PackageReference Include="StyleCop.Analyzers" Version="$(StyleCopAnalyzersVersion)">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

diff --git a/examples/slice/Telemetry/Client/Program.cs b/examples/slice/Telemetry/Client/Program.cs
@@ -12,11 +12,11 @@
 using var activitySource = new ActivitySource("IceRpc");
 
 // Configure OpenTelemetry trace provider to subscribe to the activity source used by the IceRpc telemetry interceptor,
-// and to export the traces to the Zipkin service.
+// and to export the traces using the OpenTelemetry Protocol (OTLP).
 using TracerProvider? tracerProvider = Sdk.CreateTracerProviderBuilder()
    .AddSource(activitySource.Name)
    .SetResourceBuilder(ResourceBuilder.CreateDefault().AddService("Greeter Client"))
-   .AddZipkinExporter()
+   .AddOtlpExporter()
    .Build();
 
 // Load the test root CA certificate in order to connect to the server that uses a test server certificate.

diff --git a/examples/slice/Telemetry/README.md b/examples/slice/Telemetry/README.md
@@ -1,18 +1,23 @@
 # Telemetry
 
 This application illustrates how to use the IceRPC telemetry interceptor and middleware, and how they can be integrated
-with OpenTelemetry to export traces to Zipkin. The application also shows how the trace context is propagated from the
-client to the server, by just configuring the IceRPC telemetry interceptor and middleware.
+with OpenTelemetry to export traces over the OpenTelemetry Protocol (OTLP). The application also shows how the trace
+context is propagated from the client to the server, by just configuring the IceRPC telemetry interceptor and
+middleware.
 
 You can build the client and server applications with:
 
 ``` shell
 dotnet build
 ```
 
-First start the Zipkin service as documented in the Zipkin quick start guide:
+The example sends traces to an OTLP endpoint at `http://localhost:4317` (the default for `AddOtlpExporter`). Any
+OTLP-compatible collector or backend works; the simplest option is the Jaeger v2 single-binary container, which
+natively accepts OTLP and provides a web UI:
 
-- [Zipkin quick-start](https://zipkin.io/pages/quickstart.html)
+```shell
+docker run --rm --name jaeger -p 4317:4317 -p 16686:16686 jaegertracing/jaeger:2.17.0
+```
 
 In a separate terminal start the Greeter Server program:
 
@@ -28,8 +33,6 @@ cd Client
 dotnet run
 ```
 
-The trace information should now be available in the Zipkin local service:
-
-- <http://localhost:9411/zipkin>
+The trace information should now be available in the Jaeger UI:
 
-![Zipkin](./zipkin.png)
+- <http://localhost:16686>
diff --git a/examples/slice/Telemetry/Server/Program.cs b/examples/slice/Telemetry/Server/Program.cs
@@ -13,11 +13,11 @@
 using var activitySource = new ActivitySource("IceRpc");
 
 // Configure OpenTelemetry trace provider to subscribe to the activity source used by the IceRPC telemetry middleware,
-// and to export the traces to the Zipkin service.
+// and to export the traces using the OpenTelemetry Protocol (OTLP).
 using TracerProvider? tracerProvider = Sdk.CreateTracerProviderBuilder()
    .AddSource(activitySource.Name)
    .SetResourceBuilder(ResourceBuilder.CreateDefault().AddService("Greeter Server"))
-   .AddZipkinExporter()
+   .AddOtlpExporter()
    .Build();
 
 // The default transport (QUIC) requires a server certificate. We use a test certificate here.

diff --git a/examples/slice/Telemetry/Server/Server.csproj b/examples/slice/Telemetry/Server/Server.csproj
@@ -15,7 +15,7 @@
     <PackageReference Include="IceRpc.Slice.Tools" Version="$(IceRpcVersion)" PrivateAssets="All" />
     <PackageReference Include="IceRpc.Slice" Version="$(IceRpcVersion)" />
     <PackageReference Include="IceRpc.Telemetry" Version="$(IceRpcVersion)" />
-    <PackageReference Include="OpenTelemetry.Exporter.Zipkin" Version="1.14.0" />
+    <PackageReference Include="OpenTelemetry.Exporter.OpenTelemetryProtocol" Version="1.15.3" />
     <PackageReference Include="StyleCop.Analyzers" Version="$(StyleCopAnalyzersVersion)">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

diff --git a/examples/slice/Telemetry/zipkin.png b/examples/slice/Telemetry/zipkin.png