chia7712 commented on code in PR #18919:
URL: https://github.com/apache/kafka/pull/18919#discussion_r1957408912


##########
clients/src/main/java/org/apache/kafka/common/record/RecordsUtil.java:
##########
@@ -89,10 +89,11 @@ protected static ConvertedRecords<MemoryRecords> 
downConvert(Iterable<? extends
                 buffer = Utils.ensureCapacity(buffer, buffer.position() + 
recordBatchAndRecords.batch.sizeInBytes());
                 recordBatchAndRecords.batch.writeTo(buffer);
             } else {
-                MemoryRecordsBuilder builder = convertRecordBatch(toMagic, 
buffer, recordBatchAndRecords);
-                buffer = builder.buffer();
-                temporaryMemoryBytes += builder.uncompressedBytesWritten();
-                numRecordsConverted += builder.numRecords();
+                try (MemoryRecordsBuilder builder = 
convertRecordBatch(toMagic, buffer, recordBatchAndRecords)) {

Review Comment:
   Do we really need this close? the builder returned by `convertRecordBatch` 
is already closed. see
   
   
https://github.com/apache/kafka/blob/d0e516a87207b04f6266c59712775b5f01c1ed87/clients/src/main/java/org/apache/kafka/common/record/RecordsUtil.java#L124
   
   Additionally, `RecordsUtil` is useless in trunk and it will be removed by 
#18897



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