How to delay consuming message in Kafka nodejs?

Question

I am using NodeJS to consume message from Kafka, after received the message , I will bring it to create an index in Elasticsearch. This is my piece of code :

kafkaConsumer.on('message', function (message) {
    elasticClient.index({
        index: 'test',
        type: 'sample',
        body: message
    }, function (error, response) {
        if (error) {

            // Stop consuming message here

            console.log(error);
        }
        console.log(response);
    });
});

I want to make sure that the index must be created successfully before continue consuming next message, because I don't want any message to be lost.

Answer 1

Have a try consumer.pause()/resume() .
pause() Pause the consumer
resume() Resume the consumer

Answer 2

You can pause your consumer so that it won't subscribe and fetch new messages. Once you get response from elasticClient you can resume your kafka consumer.

kafkaConsumer.pause();
kafkaConsumer.resume();

Use it according to your setup.