Question on URI format for OTLP exporter

[davendu]

Hi. I noticed in

opentelemetry-java/exporters/otlp/trace/src/main/java/io/opentelemetry/exporter/otlp/trace/OtlpGrpcSpanExporterBuilder.java

Lines 87 to 89 in 50408d4

	throw new IllegalArgumentException(
	"Invalid endpoint, must start with http:// or https://: " + uri);
	}

The builder only accepts URI starts with "http" or "https". But later, the exporter is built with gRPC, which is neither HTTP or HTTPS. So what's the situation here, is it reporting to collector in HTTP(s) or gRPC?

[jkwatson]

grpc is transported via the HTTP protocol to the collector, so this is appropriate.

[davendu]

thanks!