Is there a way to delete all the data from a topic or delete the topic before every run?

Question

Is there a way to delete all the data from a topic or delete the topic before every run?

Can I modify the KafkaConfig.scala file to change the logRetentionHour

Answer 1

All data about topics and its partitions are stored in tmp/kafka-logs/. Moreover they are stored in a format topic-partionNumber, so if you want to delete a topic newTopic, you can:

• stop kafka
• delete the files rm -rf /tmp/kafka-logs/newTopic-*