From d1cb4b2990d5b06531be57c7c697a1d58e9d05b0 Mon Sep 17 00:00:00 2001
From: Marcin Grzejszczak <marcin@grzejszczak.pl>
Date: Tue, 4 Oct 2016 13:53:33 +0200
Subject: [PATCH] Returning a copy of spans from ArrayListSpanAccumulator

---
 .../cloud/sleuth/util/ArrayListSpanAccumulator.java             | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/util/ArrayListSpanAccumulator.java b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/util/ArrayListSpanAccumulator.java
index 2a412d167..774313124 100644
--- a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/util/ArrayListSpanAccumulator.java
+++ b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/util/ArrayListSpanAccumulator.java
@@ -34,7 +34,7 @@ public class ArrayListSpanAccumulator implements SpanReporter {
 
 	public List<Span> getSpans() {
 		synchronized (this.spans) {
-			return this.spans;
+			return new ArrayList<>(this.spans);
 		}
 	}