From 1e8e6691b3105de7b312abc5e4649fff9cc0ecf6 Mon Sep 17 00:00:00 2001
From: Marcin Grzejszczak <marcin.grzejszczak@gmail.com>
Date: Tue, 24 Nov 2020 23:03:57 +0100
Subject: [PATCH] Fixed missing B3 default

---
 .../sleuth/autoconfig/otel/OtelPropagationConfiguration.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spring-cloud-sleuth-autoconfigure/src/main/java/org/springframework/cloud/sleuth/autoconfig/otel/OtelPropagationConfiguration.java b/spring-cloud-sleuth-autoconfigure/src/main/java/org/springframework/cloud/sleuth/autoconfig/otel/OtelPropagationConfiguration.java
index ce7d1fac8..e5bb7fa44 100644
--- a/spring-cloud-sleuth-autoconfigure/src/main/java/org/springframework/cloud/sleuth/autoconfig/otel/OtelPropagationConfiguration.java
+++ b/spring-cloud-sleuth-autoconfigure/src/main/java/org/springframework/cloud/sleuth/autoconfig/otel/OtelPropagationConfiguration.java
@@ -93,7 +93,7 @@ class OtelPropagationConfiguration {
 
 		@Override
 		public boolean matches(ConditionContext context, AnnotatedTypeMetadata metadata) {
-			String type = context.getEnvironment().getProperty("spring.sleuth.propagation.type", "").toLowerCase();
+			String type = context.getEnvironment().getProperty("spring.sleuth.propagation.type", PropagationType.B3.toString()).toLowerCase();
 			boolean sleuthBaggageEnabled = context.getEnvironment()
 					.getProperty("spring.sleuth.otel.propagation.sleuth-baggage.enabled", Boolean.class, false);
 			return type.contains(PropagationType.B3.toString().toLowerCase()) || sleuthBaggageEnabled;