Deleting a Kafka Topic

Prerequisites

• A Kafka instance has been created, and a topic has been created in this instance.
• The Kafka instance is in the Running state.

Constraint

If your Kafka instances are connected using Logstash, stop Logstash before deleting topics. Otherwise, services may crash.

Deleting a Kafka Topic (Console)

1. Log in to the console.
2. Click in the upper left corner to select a region.
   

   Select the region where your Kafka instance is located.

3. Click Service List and choose Application > Distributed Message Service. The Kafka instance list is displayed.
4. Click the desired Kafka instance to view the instance details.
5. In the navigation pane, choose Topics.
6. Delete topics using either of the following methods:
   • Select one or more topics and click Delete Topic in the upper left corner.
   • In the row containing the topic you want to delete, choose More > Delete.

7. In the Delete Topic dialog box that is displayed, click OK to delete the topic.

Deleting a Kafka Topic on the Client

If your Kafka client version is later than 2.2, you can use kafka-topics.sh to delete topics.

For an instance with ciphertext access enabled, if allow.everyone.if.no.acl.found is set to false, topics cannot be deleted through the client.

• For a Kafka instance with ciphertext access disabled, run the following command in the /bin directory of the Kafka client:

  ./kafka-topics.sh --bootstrap-server ${connection-address} --delete --topic ${topic-name}

• For a Kafka instance with ciphertext access enabled, do as follows:
  1. (Optional) For the Kafka security protocol, is SASL_PLAINTEXT or SASL_SSL used?
     • SASL_PLAINTEXT: Skip this step if the username and password are already set. In other cases, create the ssl-user-config.properties file in the /config directory of the Kafka client. Add the username and password by referring to 3.
     • SASL_SSL: Skip this step if the username, password, and SSL certificate are already set. In other cases, create the ssl-user-config.properties file in the /config directory of the Kafka client. Add the username and password, and the SSL certificate configuration by referring to 3.
  2. Run the following command in the /bin directory of the Kafka client:

     ./kafka-topics.sh --bootstrap-server ${connection-address} --delete --topic ${topic-name} --command-config ./config/ssl-user-config.properties