dajac commented on code in PR #14047:
URL: https://github.com/apache/kafka/pull/14047#discussion_r1268008967


##########
group-coordinator/src/main/java/org/apache/kafka/coordinator/group/RecordHelpers.java:
##########
@@ -467,6 +471,72 @@ public static Record newEmptyGroupMetadataRecord(
         );
     }
 
+    /**
+     * Creates an OffsetCommit record.
+     *
+     * @param groupId           The group id.
+     * @param topic             The topic name.
+     * @param partitionId       The partition id.
+     * @param offsetAndMetadata The offset and metadata.
+     * @param metadataVersion   The metadata version.
+     * @return The record.
+     */
+    public static Record newOffsetCommitRecord(
+        String groupId,
+        String topic,
+        int partitionId,
+        OffsetAndMetadata offsetAndMetadata,
+        MetadataVersion metadataVersion
+    ) {
+        short version = offsetAndMetadata.expireTimestampMs.isPresent() ?
+            (short) 1 : metadataVersion.offsetCommitValueVersion();
+
+        return new Record(
+            new ApiMessageAndVersion(
+                new OffsetCommitKey()
+                    .setGroup(groupId)
+                    .setTopic(topic)
+                    .setPartition(partitionId),
+                (short) 1
+            ),
+            new ApiMessageAndVersion(
+                new OffsetCommitValue()
+                    .setOffset(offsetAndMetadata.offset)
+                    
.setLeaderEpoch(offsetAndMetadata.leaderEpoch.orElse(RecordBatch.NO_PARTITION_LEADER_EPOCH))
+                    .setMetadata(offsetAndMetadata.metadata)
+                    .setCommitTimestamp(offsetAndMetadata.commitTimestampMs)
+                    // Version 1 has a non-empty expireTimestamp field
+                    
.setExpireTimestamp(offsetAndMetadata.expireTimestampMs.orElse(OffsetCommitRequest.DEFAULT_TIMESTAMP)),

Review Comment:
   This comes from 
[here](https://github.com/apache/kafka/blob/trunk/core/src/main/scala/kafka/coordinator/group/GroupMetadataManager.scala#L1094).



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