MINOR: Fix javadoc at org.apache.kafka.clients.producer.KafkaProducer.InterceptorCallback#onCompletion
Reviewers: Guozhang Wang
@@ -112,8 +112,8 @@ class DemoCallBack implements Callback {
* be called when the record sent to the server has been acknowledged. When exception is not null in the callback,
* metadata will contain the special -1 value for all fields except for topicPartition, which will be valid.
*
- * @param metadata The metadata for the record that was sent (i.e. the partition and offset). Null if an error
- * occurred.
+ * @param metadata The metadata for the record that was sent (i.e. the partition and offset). An empty metadata
+ * with -1 value for all fields except for topicPartition will be returned if an error occurred.
* @param exception The exception thrown during processing of this record. Null if no error occurred.
*/
public void onCompletion(RecordMetadata metadata, Exception exception) {
