From 7d543ce810c6d54e97e9620c4c7daf69b79ec61a Mon Sep 17 00:00:00 2001
From: Siddhesh Mhadnak <siddhesh.mhadnak@outlook.com>
Date: Tue, 2 Mar 2021 19:39:54 +0530
Subject: [PATCH] fix(propagator-jaeger): zero pad extracted trace id to 32
 characters

fixes #1983
---
 .../src/JaegerHttpTracePropagator.ts                          | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/opentelemetry-propagator-jaeger/src/JaegerHttpTracePropagator.ts b/packages/opentelemetry-propagator-jaeger/src/JaegerHttpTracePropagator.ts
index 84ac964a592..267cafba02b 100644
--- a/packages/opentelemetry-propagator-jaeger/src/JaegerHttpTracePropagator.ts
+++ b/packages/opentelemetry-propagator-jaeger/src/JaegerHttpTracePropagator.ts
@@ -95,8 +95,10 @@ function deserializeSpanContext(serializedString: string): SpanContext | null {
   if (headers.length !== 4) {
     return null;
   }
-  const [traceId, spanId, , flags] = headers;
 
+  const [_traceId, spanId, , flags] = headers;
+
+  const traceId = _traceId.padStart(32, '0');
   const traceFlags = flags.match(/^[0-9a-f]{2}$/i) ? parseInt(flags) & 1 : 1;
 
   return { traceId, spanId, isRemote: true, traceFlags };