Change OTLP/HTTP default port from 4317 to 4318

docs/public/sdk/GettingStarted.rst

@@ -66,7 +66,7 @@ OpenTelemetry offers six tracing exporters out of the box:
 
     // otlp http exporter
     opentelemetry::exporter::otlp::OtlpHttpExporterOptions opts;
-    opts.url = "http://localhost:4317/v1/traces";
+    opts.url = "http://localhost:4318/v1/traces";
     auto otlp_http_exporter =
         std::unique_ptr<sdktrace::SpanExporter>(new opentelemetry::exporter::otlp::OtlpHttpExporter(opts));
 

examples/otlp/README.md

@@ -32,19 +32,18 @@ OpenTelemetry Collector with an OTLP receiver by running:
 - On Unix based systems use:
 
 ```console
-docker run --rm -it -p 4317:4317 -p 55681:55681 -v $(pwd)/examples/otlp:/cfg otel/opentelemetry-collector:0.19.0 --config=/cfg/opentelemetry-collector-config/config.dev.yaml
+docker run --rm -it -p 4317:4317 -p 4318:4318 -v $(pwd)/examples/otlp:/cfg otel/opentelemetry-collector:0.19.0 --config=/cfg/opentelemetry-collector-config/config.dev.yaml
 ```
 
 - On Windows use:
 
 ```console
-docker run --rm -it -p 4317:4317 -p 55681:55681 -v "%cd%/examples/otlp":/cfg otel/opentelemetry-collector:0.19.0 --config=/cfg/opentelemetry-collector-config/config.dev.yaml
+docker run --rm -it -p 4317:4317 -p 4318:4318 -v "%cd%/examples/otlp":/cfg otel/opentelemetry-collector:0.19.0 --config=/cfg/opentelemetry-collector-config/config.dev.yaml
 ```
 
-Note that the OTLP exporter connects to the Collector at `localhost:4317` by
-default. This can be changed with first argument from command-line, for example:
+Note that the OTLP gRPC and HTTP exporters connects to the Collector at `localhost:4317` and `localhost:4318:/v1/traces` respectively. This can be changed with first argument from command-line, for example:
 `./example_otlp_grpc gateway.docker.internal:4317` and
-`./example_otlp_http gateway.docker.internal:55681/v1/traces`.
+`./example_otlp_http gateway.docker.internal:4318/v1/traces`.
 
 Once you have the Collector running, see
 [CONTRIBUTING.md](../../CONTRIBUTING.md) for instructions on building and

examples/otlp/opentelemetry-collector-config/config.dev.yaml

@@ -7,7 +7,7 @@ receivers:
       grpc:
         endpoint: 0.0.0.0:4317
       http:
-        endpoint: "0.0.0.0:55681"
+        endpoint: "0.0.0.0:4318"
         cors_allowed_origins:
         - '*'
 service:

exporters/otlp/README.md

@@ -63,7 +63,7 @@ auto exporter = std::unique_ptr<sdktrace::SpanExporter>(new otlp::OtlpHttpExport
 
 | Option       | Env Variable |Default          | Description |
 | ------------ |-----|------------ |------|
-| `url`   | `OTEL_EXPORTER_OTLP_ENDPOINT` | `http://localhost:4317/v1/traces`  | The OTLP HTTP endpoint to connect to |
+| `url`   | `OTEL_EXPORTER_OTLP_ENDPOINT` | `http://localhost:4318/v1/traces`  | The OTLP HTTP endpoint to connect to |
 |              |   `OTEL_EXPORTER_OTLP_TRACES_ENDPOINT`  |  | |
 | `content_type` | n/a  | `application/json`  |   Data format used - JSON or Binary |
 | `json_bytes_mapping`  |  n/a | `JsonBytesMappingKind::kHexId` | Encoding used for trace_id and span_id |

exporters/otlp/include/opentelemetry/exporters/otlp/otlp_environment.h

@@ -38,7 +38,7 @@ inline const std::string GetOtlpDefaultHttpEndpoint()
 {
   constexpr char kOtlpTracesEndpointEnv[] = "OTEL_EXPORTER_OTLP_TRACES_ENDPOINT";
   constexpr char kOtlpEndpointEnv[]       = "OTEL_EXPORTER_OTLP_ENDPOINT";
-  constexpr char kOtlpEndpointDefault[]   = "http://localhost:4317/v1/traces";
+  constexpr char kOtlpEndpointDefault[]   = "http://localhost:4318/v1/traces";
 
   auto endpoint = opentelemetry::sdk::common::GetEnvironmentVariable(kOtlpTracesEndpointEnv);
   if (endpoint.empty())