MINOR: Fix Trace log typo in RecordAccumulator.java (#16487)

Author: nicolasguyomar

Diff for: clients/src/main/java/org/apache/kafka/clients/producer/internals/RecordAccumulator.java

@@ -346,7 +346,7 @@ public RecordAppendResult append(String topic,
                 if (buffer == null) {
                     byte maxUsableMagic = apiVersions.maxUsableProduceMagic();
                     int size = Math.max(this.batchSize, AbstractRecords.estimateSizeInBytesUpperBound(maxUsableMagic, compression.type(), key, value, headers));
-                    log.trace("Allocating a new {} byte message buffer for topic {} partition {} with remaining timeout {}ms", size, topic, partition, maxTimeToBlock);
+                    log.trace("Allocating a new {} byte message buffer for topic {} partition {} with remaining timeout {}ms", size, topic, effectivePartition, maxTimeToBlock);
                     // This call may block if we exhausted buffer space.
                     buffer = free.allocate(size, maxTimeToBlock);
                     // Update the current time in case the buffer allocation blocked above.