要清除队列，可以删除主题:

bin/kafka-topics.sh --zookeeper localhost:2181 --delete --topic test

然后重新创造它:

bin/kafka-topics.sh --create --zookeeper localhost:2181 \
    --replication-factor 1 --partitions 1 --topic test

更新:这个答案与Kafka 0.6相关。对于Kafka 0.8和以后参见@Patrick的回答。

是的，停止kafka，手动删除相应子目录下的所有文件(在kafka数据目录下很容易找到)。kafka重启后，主题将为空。

从Java，使用新的AdminZkClient代替已弃用的AdminUtils:

  public void reset() {
    try (KafkaZkClient zkClient = KafkaZkClient.apply("localhost:2181", false, 200_000,
        5000, 10, Time.SYSTEM, "metricGroup", "metricType")) {

      for (Map.Entry<String, List<PartitionInfo>> entry : listTopics().entrySet()) {
        deleteTopic(entry.getKey(), zkClient);
      }
    }
  }

  private void deleteTopic(String topic, KafkaZkClient zkClient) {

    // skip Kafka internal topic
    if (topic.startsWith("__")) {
      return;
    }

    System.out.println("Resetting Topic: " + topic);
    AdminZkClient adminZkClient = new AdminZkClient(zkClient);
    adminZkClient.deleteTopic(topic);

    // deletions are not instantaneous
    boolean success = false;
    int maxMs = 5_000;
    while (maxMs > 0 && !success) {
      try {
        maxMs -= 100;
        adminZkClient.createTopic(topic, 1, 1, new Properties(), null);
        success = true;
      } catch (TopicExistsException ignored) {
      }
    }

    if (!success) {
      Assert.fail("failed to create " + topic);
    }
  }

  private Map<String, List<PartitionInfo>> listTopics() {
    Properties props = new Properties();
    props.put("bootstrap.servers", kafkaContainer.getBootstrapServers());
    props.put("group.id", "test-container-consumer-group");
    props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
    props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");

    KafkaConsumer<String, String> consumer = new KafkaConsumer<>(props);
    Map<String, List<PartitionInfo>> topics = consumer.listTopics();
    consumer.close();

    return topics;
  }

要清除队列，可以删除主题:

bin/kafka-topics.sh --zookeeper localhost:2181 --delete --topic test

然后重新创造它:

bin/kafka-topics.sh --create --zookeeper localhost:2181 \
    --replication-factor 1 --partitions 1 --topic test

如果您希望在Java应用程序中以编程方式完成此操作，可以使用AdminClient的API deleterrecords。使用AdminClient可以删除分区和偏移量级别上的记录。

根据JavaDocs, 0.11.0.0或更高版本的代理支持此操作。

这里有一个简单的例子:

String brokers = "localhost:9092";
String topicName = "test";
TopicPartition topicPartition = new TopicPartition(topicName, 0);
RecordsToDelete recordsToDelete = RecordsToDelete.beforeOffset(5L);

Map<TopicPartition, RecordsToDelete> topicPartitionRecordToDelete = new HashMap<>();
topicPartitionRecordToDelete.put(topicPartition, recordsToDelete);

// Create AdminClient
final Properties properties = new Properties();
properties.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, brokers);
AdminClient adminClient = AdminClient.create(properties);

try {
  adminClient.deleteRecords(topicPartitionRecordToDelete).all().get();
} catch (InterruptedException e) {
  e.printStackTrace();
} catch (ExecutionException e) {
  e.printStackTrace();
} finally {
  adminClient.close();
}

临时更新主题的保留时间为1秒:

kafka-topics.sh \
  --zookeeper <zkhost>:2181 \
  --alter \
  --topic <topic name> \
  --config retention.ms=1000

在更新的Kafka版本中，你也可以使用Kafka -configs——实体类型主题

kafka-configs.sh \
  --zookeeper <zkhost>:2181 \
  --entity-type topics \
  --alter \
  --entity-name <topic name> \
  --add-config retention.ms=1000

然后等待清除生效(持续时间取决于主题的大小)。一旦清除，恢复以前的保留。女士的价值。