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Kafka And Handling Missing Topics

The folks at Redglue show what happens when you send a message to a Kafka broker on a non-existent topic:

Now let’s produce messages to a non-existent topic called redglue_nonexistent:

[email protected]:~# kafka-console-producer --broker-list 127.0.0.1:9092 --topic redglue_nonexistent
I maybe don't exists
[2018-11-28 14:22:12,454] WARN [Producer clientId=console-producer] Error while fetching metadata with correlation id 1 : {redglue_nonexistent=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)

Obvious there a WARNING saying that the topic doesn’t exists, but it allows you to “send” messages to that specific topic

Read on to see what happens.