Some message is missing

[tuafree]

I sent one-by-one message to the producer, please see my code below,

const producer = new Kafka.Producer(
{
'bootstrap.servers': ${process.env.KAFKA_SERVER},
'sasl.username': ${process.env.KAFKA_USERNAME},
'sasl.password': ${process.env.KAFKA_PASSWORD},
'security.protocol': 'sasl_ssl',
'sasl.mechanisms': 'PLAIN',
'client.id': ${process.env.KAFKA_CLIENT_ID},
'dr_cb': true,
'enable.idempotence': true
},
{
'request.required.acks': -1,
},
);

producer.setPollInterval(100);

producer.connect({}, (err, data) => {
  if (err) {
    console.log('CONNECT ERROR: ', err)
  }
});

producer.on('ready', async function () {
  const key: string = uuid + `-` + providerRefCode + `-` + Date.now();
  producer.produce(
    topic,
    -1,
    data,
    key,
    Date.now()
  );
  producer.poll();
});

producer.on('delivery-report', function (err, report) {
  if (err) {
    console.log('REPORT ERROR: ', JSON.stringify(err))
  }
  producer.disconnect();
});

producer.on('event.error', function (err) {
  console.error(err);
  if (err.code == -1) {
    producer.disconnect();
  }
});

I found some messages missing from the target database without an error message. How to find the root cause?