From a7b327e72eb41737e27be3848928e5d6450e8300 Mon Sep 17 00:00:00 2001
From: Tyler Benson <tyler.benson@datadoghq.com>
Date: Fri, 13 Mar 2020 14:56:45 -0700
Subject: [PATCH] Add check to ensure value isn't empty

Otherwise split on an empty string will return an empty array.
---
 .../main/java/datadog/trace/agent/tooling/OpenTracing32.java  | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/OpenTracing32.java b/dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/OpenTracing32.java
index 3c10737cea..55b17b5d35 100644
--- a/dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/OpenTracing32.java
+++ b/dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/OpenTracing32.java
@@ -301,7 +301,9 @@ public final class OpenTracing32 implements TracerAPI {
         // extracted header value
         String s = getter.get(carrier, key);
         // in case of multiple values in the header, need to parse
-        if (s != null) s = s.split(",")[0].trim();
+        if (s != null && !s.isEmpty()) {
+          s = s.split(",")[0].trim();
+        }
         extracted.put(key, s);
       }
     }