[kafka] 01/02: KAFKA-8861 Fix flaky RegexSourceIntegrationTest.testMultipleConsumersCanReadFromPartitionedTopic (#7281)

[bbejeck]

This is an automated email from the ASF dual-hosted git repository.

bbejeck pushed a commit to branch 2.2
in repository https://gitbox.apache.org/repos/asf/kafka.git

commit aa0c76af8e02eaa6112b2ff94beaf4e7b9629449
Author: Chia-Ping Tsai <chia7...@gmail.com>
AuthorDate: Wed Sep 4 22:13:56 2019 +0800

    KAFKA-8861 Fix flaky 
RegexSourceIntegrationTest.testMultipleConsumersCanReadFromPartitionedTopic 
(#7281)
    
    similar to https://issues.apache.org/jira/browse/KAFKA-8011 and 
https://issues.apache.org/jira/browse/KAFKA-8026
    
    Reviewers:  Matthias J. Sax <mj...@apache.org>,  Bill Bejeck 
<bbej...@gmail.com>
---
 .../apache/kafka/streams/integration/RegexSourceIntegrationTest.java  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git 
a/streams/src/test/java/org/apache/kafka/streams/integration/RegexSourceIntegrationTest.java
 
b/streams/src/test/java/org/apache/kafka/streams/integration/RegexSourceIntegrationTest.java
index fc7a14c..26543d1 100644
--- 
a/streams/src/test/java/org/apache/kafka/streams/integration/RegexSourceIntegrationTest.java
+++ 
b/streams/src/test/java/org/apache/kafka/streams/integration/RegexSourceIntegrationTest.java
@@ -312,8 +312,8 @@ public class RegexSourceIntegrationTest {
             partitionedStreamLeader.to(DEFAULT_OUTPUT_TOPIC, 
Produced.with(stringSerde, stringSerde));
             partitionedStreamFollower.to(DEFAULT_OUTPUT_TOPIC, 
Produced.with(stringSerde, stringSerde));
 
-            final List<String> leaderAssignment = new ArrayList<>();
-            final List<String> followerAssignment = new ArrayList<>();
+            final List<String> leaderAssignment = new CopyOnWriteArrayList<>();
+            final List<String> followerAssignment = new 
CopyOnWriteArrayList<>();
 
             partitionedStreamsLeader  = new 
KafkaStreams(builderLeader.build(), streamsConfiguration, new 
DefaultKafkaClientSupplier() {
                 @Override