kirktrue commented on code in PR #19917:
URL: https://github.com/apache/kafka/pull/19917#discussion_r2152538609


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/ConsumerRebalanceListenerInvoker.java:
##########
@@ -103,11 +114,14 @@ public Exception invokePartitionsRevoked(final 
SortedSet<TopicPartition> revoked
     }
 
     public Exception invokePartitionsLost(final SortedSet<TopicPartition> 
lostPartitions) {
-        log.info("Lost previously assigned partitions {}", 
lostPartitions.stream().map(TopicPartition::toString).collect(Collectors.joining(",
 ")));
+        if (log.isInfoEnabled())
+            log.info("Lost previously assigned partitions {}", 
Utils.topicPartitionString(lostPartitions));
+
         Set<TopicPartition> lostPausedPartitions = 
subscriptions.pausedPartitions();
         lostPausedPartitions.retainAll(lostPartitions);
-        if (!lostPausedPartitions.isEmpty())
-            log.info("The pause flag in partitions [{}] will be removed due to 
partition lost.", 
lostPartitions.stream().map(TopicPartition::toString).collect(Collectors.joining(",
 ")));
+
+        if (!lostPausedPartitions.isEmpty() && log.isInfoEnabled())
+            log.info("The pause flag in partitions [{}] will be removed due to 
partition lost.", Utils.topicPartitionString(lostPartitions));

Review Comment:
   Done



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