kafka默认仅做删除标记，并没有真实删除，若要真实删除topic
方法一：修改配置文件server.properties并进行重启
server.properties添加：delete.topic.enable=true，然后重启
删除测试
# 创建topic
> ./bin/kafka-topics.sh --create --zookeeper 127.0.0.1:2180 --replication-factor 1 --partitions 1 --topic test
Created topic test.
# 查看topic
> ./bin/kafka-topics.sh --zookeeper 127.0.0.1:2180 --list
test
# 删除topic
> ./bin/kafka-topics.sh --delete --zookeeper 127.0.0.1:2180 --topic test
# 查看topic
> ./bin/kafka-topics.sh --zookeeper 127.0.0.1:2180 --list
方法二：登录Zookeeper，删除topic目录
删除测试
# 创建topic
> ./bin/kafka-topics.sh --create --zookeeper 127.0.0.1:2180 --replication-factor 1 --partitions 1 --topic test
Created topic test.
# 查看topic
> ./bin/kafka-topics.sh --zookeeper 127.0.0.1:2180 --list
test
# 登录zookeeper删除目录
> ./zkCli.sh -server *.*.*.*:2180
[zk: 106.13.73.198:2180(CONNECTED) 0] ls /brokers/topics
[zk: 106.13.73.198:2180(CONNECTED) 0] deleteall /brokers/topics/test
# 旧版本为rmr /brokers/topics/test
# 查看topic
> ./bin/kafka-topics.sh --zookeeper 127.0.0.1:2180 --list
