Fix default Jaeger collector endpoint (#1898)

* Fix default Jeager collector endpoint

* Update CHANGELOG.md

CHANGELOG.md

@@ -61,6 +61,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Only report errors from the `"go.opentelemetry.io/otel/sdk/resource".Environment` function when they are not `nil`. (#1850, #1851)
 - The `Shutdown` method of the simple `SpanProcessor` in the `go.opentelemetry.io/otel/sdk/trace` package now honors the context deadline or cancellation. (#1616, #1856)
 - BatchSpanProcessor now drops span batches that failed to be exported. (#1860)
+- Use `http://localhost:14268/api/traces` as default Jaeger collector endpoint instead of `http://localhost:14250`. (#1898)
 
 ### Security
 

exporters/trace/jaeger/env_test.go

@@ -26,7 +26,7 @@ import (
 
 func TestNewRawExporterWithDefault(t *testing.T) {
 	const (
-		collectorEndpoint = "http://localhost:14250"
+		collectorEndpoint = "http://localhost:14268/api/traces"
 		username          = ""
 		password          = ""
 	)

exporters/trace/jaeger/uploader.go

@@ -129,12 +129,12 @@ func WithMaxPacketSize(size int) AgentEndpointOption {
 // - OTEL_EXPORTER_JAEGER_PASSWORD is the password to be sent as authentication to the collector endpoint.
 //
 // The passed options will take precedence over any environment variables.
-// If neither values are provided for the endpoint, the default value of "http://localhost:14250" will be used.
+// If neither values are provided for the endpoint, the default value of "http://localhost:14268/api/traces" will be used.
 // If neither values are provided for the username or the password, they will not be set since there is no default.
 func WithCollectorEndpoint(options ...CollectorEndpointOption) EndpointOption {
 	return func() (batchUploader, error) {
 		o := &CollectorEndpointOptions{
-			endpoint:   envOr(envEndpoint, "http://localhost:14250"),
+			endpoint:   envOr(envEndpoint, "http://localhost:14268/api/traces"),
 			username:   envOr(envUser, ""),
 			password:   envOr(envPassword, ""),
 			httpClient: http.DefaultClient,
@@ -173,7 +173,7 @@ type CollectorEndpointOptions struct {
 // This option overrides any value set for the
 // OTEL_EXPORTER_JAEGER_ENDPOINT environment variable.
 // If this option is not passed and the environment variable is not set,
-// "http://localhost:14250" will be used by default.
+// "http://localhost:14268/api/traces" will be used by default.
 func WithEndpoint(endpoint string) CollectorEndpointOption {
 	return func(o *CollectorEndpointOptions) {
 		o.endpoint = endpoint