[Kafka] How to completely delete a topic

1. Delete the kafka storage directory (server.properties file log.dirs configuration, the default is "/tmp/kafka-logs") related topic directory
2. The command for Kafka to delete a topic is:

kafka/bin/kafka-topics.sh --delete --zookeeper Zookeeper地址 --topic 主题名称

If "delete.topic.enable=true" is not configured in server.properties in the configuration file loaded when kafaka starts, then the deletion at this time is not a real deletion, but marks the topic for deletion: marked for deletion

• You can view all topics with the following command:

kafka/bin/kafka-topics.sh --list --zookeeper Zookeeper地址 

• At this point, if you want to actually delete it, you can do the following:
  (1) The command to log in to the zookeeper client:

zookeeper/bin/zkCli.sh 

(2) Find the directory where the topic is located:

ls /brokers/topics

(3) Find the topic to be deleted and execute the following command. At this time, the topic is completely deleted:

rmr /brokers/topics/topic名称

• In addition, the topic marked as marked for deletion can be obtained by the command in the zookeeper client: ls /admin/delete_topics/topic name, if you delete the topic here, then the marked for deletion mark disappears.
  Zookeeper's config is also related Topic information, I don't know what it is for now:
  ls /config/topics/topic name

• Summary :
  Delete topic completely:
  1. Delete the kafka storage directory (server.properties file log.dirs configuration, default is "/tmp/kafka-logs") related topic directory
  2. If delete.topic.enable=true is configured, directly pass Command to delete, if the command cannot be deleted, you can delete the topic under the broker directly through the zookeeper client.