[kafka] branch 2.0 updated: KAFKA-8861 Fix flaky RegexSourceIntegrationTest.testMultipleConsumersCanReadFromPartitionedTopic (#7281)

[bbejeck]

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bbejeck pushed a commit to branch 2.0
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The following commit(s) were added to refs/heads/2.0 by this push:
     new e6eda88  KAFKA-8861 Fix flaky 
RegexSourceIntegrationTest.testMultipleConsumersCanReadFromPartitionedTopic 
(#7281)
e6eda88 is described below

commit e6eda88180b843020725082a9bcfd08985e154c0
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 0c6f21e..7090630 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
@@ -330,8 +330,8 @@ 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