工作中因為各種原因， 例如topic中訊息堆積的太多，或者kafka所在磁碟空間滿了等等，可能需要徹底清理一下kafka topic，那麼如何徹底刪除topic？
方法一（配置delete.topic.enable=true）
  修改kafaka配置檔案server.properties， 新增delete.topic.enable=true，重啟kafka，之後通過kafka命令列就可以直接刪除topic
  通過命令列刪除topic：

    ./bin/kafka-topics.sh --delete --zookeeper {zookeeper server} --topic {topic name}

方法二（沒有配置delete.topic.enable=true）

1、通過命令列刪除topic：

./bin/kafka-topics.sh --delete --zookeeper {zookeeper server} --topic {topic name}

  因為kafaka配置檔案中server.properties沒有配置delete.topic.enable=true，此時的刪除並不是真正的刪除，只是把topic標記為：marked for deletion
  你可以通過命令：./bin/kafka-topics --zookeeper {zookeeper server} --list 來檢視所有topic
2、刪除kafka儲存目錄（server.properties檔案log.dirs配置，預設為"/tmp/kafka-logs"）相關topic目錄

3， 若想真正刪除它，需要登入zookeeper客戶端：

  命令：./bin/zkCli.sh

  找到topic所在的目錄：ls /brokers/topics

   執行命令：rmr /brokers/topics/{topic name}即可，此時topic被徹底刪除。

  另外被標記為marked for deletion的topic你可以在zookeeper客戶端中通過命令獲得：ls /admin/delete_topics/{topic name}，如果你刪除了此處的topic，那麼marked for deletion 標記消失

zookeeper 的config中也有有關topic的資訊： ls /config/topics/{topic name}暫時不知道有什麼用

總結

徹底刪除topic：
1、確保kafka的配置檔案server.proeprties中設定delete.topic.enable=true，如果沒有， 確保cluster的所有kafka配置檔案設定該引數並重啟，然後直接通過命令刪除，如果命令刪除不了，直接通過zookeeper命令列刪除掉broker下的topic。

2、刪除kafka儲存目錄（server.properties檔案log.dirs配置，預設為"/tmp/kafka-logs"）相關topic目錄

參考文件：
1， https://stackoverflow.com/questions/17730905/is-there-a-way-to-delete-all-the-data-from-a-topic-or-delete-the-topic-before-ev

1. stop zookeeper & Kafka server,
2. then go to ‘kafka-logs’ folder , there you will see list of kafka topic folders, delete folder with topic name
3. go to ‘zookeeper-data’ folder , delete data inside that.
4. start zookeeper & kafka server again.

2， https://cwiki.apache.org/confluence/display/KAFKA/FAQ#FAQ-Isitpossibletodeleteatopic?
Deleting a topic is supported since 0.8.2.x. You will need to enable topic deletion (setting delete.topic.enable to true) on all brokers first.

3， https://cwiki.apache.org/confluence/display/KAFKA/KIP-162+-+Enable+topic+deletion+by+default

4， https://github.com/darrenfu/bigdata/issues/6

*** The only way to delete a topic permanently is as follows: ***

stop the brokers
sudo supervisorctl stop kafka-broker
remove the directories on disk
sudo rm -rf <kafka_data_dir>/<topic_name>*
remove the topic from zookeeper:
bin/zkCli.sh

rmr /config/topics/<topic_name>
rmr /brokers/topics/<topic_name>
rmr /admin/delete_topics/<topic_name>

verify the topic directory is deleted in zookeeper:

ls

start the brokers back up
sudo supervisorctl start kafka-broker
re-create the kafka topic if needed