我无法删除Kafka主题，它们只是标记为删除。有什么问题吗？我错过什么了吗？欢迎提出任何建议。
我试图用两种方法删除Kafka的主题：
首先，我运行命令：

kafka-topics.bat --delete --zookeeper localhost:2181 --topic Cat

其次，我尝试了编程

public void deleteSomeTopic() throws Exception {

  consumer = new SimpleConsumer(host, port, soTimeout,  bufferSize,"deleteClient");

  List<String> listTopics = new ArrayList<>();
  TopicMetadataRequest request = new TopicMetadataRequest(listTopics);

  //consumer will send request and get corresponding response
  TopicMetadataResponse response = consumer.send(request);

  //getting topicMetadata list
  List<TopicMetadata> topicMetadataList = response.topicsMetadata();

  for (TopicMetadata topicMetadata: topicMetadataList) {
     System.out.println("Do you want to delete this Topic: "+ topicMetadata.topic());
     String ch = scanner.next();
     if(ch.equalsIgnoreCase("y"))
        AdminUtils.deleteTopic(zkClient, topicMetadata.topic());
     Thread.sleep(2000);
  }
}

两个都成功执行，但当我使用命令列出主题时

kafka-topics.bat --list -zookeeper localhost:2181

它的输出看起来像

Ape - marked for deletion   
Cat - marked for deletion     
Dog - marked for deletion   
Elephant                    
apple                       
carrot                      
ginger - marked for deletion
guava                       
mango

我的server.properties文件也有

controlled.shutdown.enable=true
delete.topic.enable=true

我使用的是kafka_2.10-0.8.2.2，pom.xml文件只有两个依赖项。

<dependencies>
    <dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-streaming_2.10</artifactId>
        <version>1.5.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-streaming-kafka_2.10</artifactId>
        <version>1.5.1</version>
    </dependency>
</dependencies>

我还查了tmp/kafka日志目录，topics目录还在。我需要解决什么问题？