From 75b92c6a5c7a732088a8ee150df996689016a4fa Mon Sep 17 00:00:00 2001
From: Tigran Najaryan <4194920+tigrannajaryan@users.noreply.github.com>
Date: Fri, 20 Jan 2023 14:36:16 -0500
Subject: [PATCH] Delete requirement to generate new trace/span id if an
 invalid id is received (#444)

This is considered an bug in the spec that was uncovered in the discussion here:
https://github.com/open-telemetry/opentelemetry-proto/pull/442#discussion_r1061995668

I did some spelunking and the "generate" recommendation comes from the very first commit:
https://github.com/open-telemetry/opentelemetry-proto/commit/b5bcfffce09c956b1419b2b56a9aaff384797517#diff-ef5f80fbf835dd57e14cb9264944f03d80cf6b04cc7671b0e7fb33167c67efcc
where they were copied from Java repo, to which they were copied from OpenCensus
https://github.com/open-telemetry/opentelemetry-java/pull/134 and in OpenCensus the
wording first time appeared here https://github.com/census-instrumentation/opencensus-proto/pull/160
(authored by @SergeyKanzhelev, merged by @bogdandrutu).

We are deleting the requirement to generate a new trace id or span id if an invalid
id is received. The receivers can decide how they want to treat the invalid id (just
like upon receiving any other invalid id), e.g. they may drop it, log an error, accept
the invalid data, etc. We are not going to prescribe a particular receiver behavior
when invalid trace/span id is received.
---
 opentelemetry/proto/trace/v1/trace.proto | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/opentelemetry/proto/trace/v1/trace.proto b/opentelemetry/proto/trace/v1/trace.proto
index 590355074..3103fe76f 100644
--- a/opentelemetry/proto/trace/v1/trace.proto
+++ b/opentelemetry/proto/trace/v1/trace.proto
@@ -82,9 +82,6 @@ message Span {
   // the same `trace_id`. The ID is a 16-byte array. An ID with all zeroes
   // is considered invalid.
   //
-  // This field is semantically required. Receiver should generate new
-  // random trace_id if empty or invalid trace_id was received.
-  //
   // This field is required.
   bytes trace_id = 1;
 
@@ -92,9 +89,6 @@ message Span {
   // is created. The ID is an 8-byte array. An ID with all zeroes is considered
   // invalid.
   //
-  // This field is semantically required. Receiver should generate new
-  // random span_id if empty or invalid span_id was received.
-  //
   // This field is required.
   bytes span_id = 2;