From ef94e2fb79a64708f37c0a628e8819ebe9f8643e Mon Sep 17 00:00:00 2001
From: Nikolay Martynov <mar.kolya@gmail.com>
Date: Fri, 24 May 2019 16:37:27 -0400
Subject: [PATCH] Add note about Kafka consumer iterator thread safety

---
 .../trace/instrumentation/kafka_clients/TracingIterable.java  | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dd-java-agent/instrumentation/kafka-clients-0.11/src/main/java/datadog/trace/instrumentation/kafka_clients/TracingIterable.java b/dd-java-agent/instrumentation/kafka-clients-0.11/src/main/java/datadog/trace/instrumentation/kafka_clients/TracingIterable.java
index 01135fea39..3757fd12ac 100644
--- a/dd-java-agent/instrumentation/kafka-clients-0.11/src/main/java/datadog/trace/instrumentation/kafka_clients/TracingIterable.java
+++ b/dd-java-agent/instrumentation/kafka-clients-0.11/src/main/java/datadog/trace/instrumentation/kafka_clients/TracingIterable.java
@@ -33,6 +33,10 @@ public class TracingIterable implements Iterable<ConsumerRecord> {
     private final String operationName;
     private final KafkaDecorator decorator;
 
+    /**
+     * Note: this may potentially create problems if this iterator is used from different threads.
+     * But at the moment we cannot do much about this.
+     */
     private Scope currentScope;
 
     public TracingIterator(