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The Kafka Series (part 5): deleting topics

Before going further a quick post about topic deletion in Kafka (someone asked me about this).
In part 2 of this series we created a topic called kafkatesting for testing purposes and to get familiar with the Java APIs to implement producers and consumers. When you're done with testing you will need to delete it. This could be done running the following command from a shell:

$KAFKA_HOME/bin/kafka-topics.sh --zookeeper localhost:2181 --delete --topic kafkatesting

Then if you check the list of existing topics for that cluster you could still see the topic there having the label "marked for deletion". This happens when you use the default properties file for Kafka or you didn't explicitly set to true the value of the delete.topic.enable property (the default value for it is false) in your custom copy of that file. In order to make this configuration change effective you have to restart both Kafka and ZooKeeper.
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