[GitHub] [kafka] jeqo commented on a change in pull request #10042: KAFKA-9527: fix NPE when using time-based argument for Stream Resetter

[GitBox]

jeqo commented on a change in pull request #10042:
URL: https://github.com/apache/kafka/pull/10042#discussion_r571434067



##########
File path: core/src/main/scala/kafka/tools/StreamsResetter.java
##########
@@ -503,7 +505,15 @@ private void resetToDatetime(final Consumer<byte[], 
byte[]> client,
         final Map<TopicPartition, OffsetAndTimestamp> topicPartitionsAndOffset 
= client.offsetsForTimes(topicPartitionsAndTimes);
 
         for (final TopicPartition topicPartition : inputTopicPartitions) {
-            client.seek(topicPartition, 
topicPartitionsAndOffset.get(topicPartition).offset());
+            final Optional<Long> partitionOffset = 
Optional.ofNullable(topicPartitionsAndOffset.get(topicPartition))
+                    .map(OffsetAndTimestamp::offset);

Review comment:
       just in case, latest consumer-group reset-offset is comparing against 
`ListOffsetsResponse.UNKNOWN_OFFSET` instead of `null`.
   
   
https://github.com/apache/kafka/blob/0bc394cc1d19f1e41dd6646e9ac0e09b91fb1398/core/src/main/scala/kafka/admin/ConsumerGroupCommand.scala#L680-L681




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