[kafka] branch 3.4 updated: KAFKA-14862 (HOTFIX): Fix ConcurrentModificationException (#13734)

[showuon]

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showuon pushed a commit to branch 3.4
in repository https://gitbox.apache.org/repos/asf/kafka.git


The following commit(s) were added to refs/heads/3.4 by this push:
     new 2f134711817 KAFKA-14862 (HOTFIX): Fix ConcurrentModificationException 
(#13734)
2f134711817 is described below

commit 2f1347118175946486bce3bba8d1107281014764
Author: Matthias J. Sax <matth...@confluent.io>
AuthorDate: Sun May 21 14:39:12 2023 -0700

    KAFKA-14862 (HOTFIX): Fix ConcurrentModificationException (#13734)
    
    Reviewers: Walker Carlson <<wcarl...@confluent.io>
---
 .../org/apache/kafka/streams/kstream/internals/KStreamImplJoin.java   | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git 
a/streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamImplJoin.java
 
b/streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamImplJoin.java
index f4ad9ac682f..8e0fcfece0e 100644
--- 
a/streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamImplJoin.java
+++ 
b/streams/src/main/java/org/apache/kafka/streams/kstream/internals/KStreamImplJoin.java
@@ -44,11 +44,11 @@ import 
org.apache.kafka.streams.state.internals.LeftOrRightValueSerde;
 
 import java.time.Duration;
 import java.util.Arrays;
-import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
 
 import static 
org.apache.kafka.streams.internals.ApiUtils.prepareMillisCheckFailMsgPrefix;
 import static 
org.apache.kafka.streams.internals.ApiUtils.validateMillisecondDuration;
@@ -60,7 +60,7 @@ class KStreamImplJoin {
     private final boolean rightOuter;
 
     static class TimeTrackerSupplier {
-        private final Map<TaskId, TimeTracker> tracker = new HashMap<>();
+        private final Map<TaskId, TimeTracker> tracker = new 
ConcurrentHashMap<>();
 
         public TimeTracker get(final TaskId taskId) {
             return tracker.computeIfAbsent(taskId, taskId1 -> new 
TimeTracker());