"An OTLP empty request (a request that does not carry any telemetry data) SHOULD respond with success."

[kentquirk]

From the OTel spec:

If the server receives an empty request (a request that does not carry any telemetry data) the server SHOULD respond with success.

Honeycomb responds with 400: Request body should not be empty

Additional context
Reported by a customer.

❯ curl -i https://api.honeycomb.io/v1/traces -H "Content-Type: application/json" -H "x-honeycomb-team: $HC_KEY" -X POST -d '{}'
HTTP/1.1 200 OK
Connection: close

HTTP/1.1 400 Bad Request
Date: Thu, 11 Apr 2024 03:09:42 GMT
Content-Type: application/json
Content-Length: 46
Connection: keep-alive
Access-Control-Allow-Origin: *
Vary: Accept-Encoding

{"message":"request body should not be empty"}%     


❯ curl -i http://localhost:4318/v1/traces -X POST -H "Content-Type: application/json" -d '{}'
HTTP/1.1 200 OK
Content-Type: application/json
Date: Thu, 11 Apr 2024 03:09:51 GMT
Content-Length: 21

{"partialSuccess":{}}%