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Q: 8
When is the onCompletion() method called? private class ProducerCallback implements Callback { @Override public void onCompletion(RecordMetadata recordMetadata, Exception e) { if (e != null) { e.printStackTrace(); } } } ProducerRecord record = new ProducerRecord("topic1", "key1", "value1"); producer.send(record, new ProducerCallback());
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Question 8 of 25

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