View a message in a Hermes topic

View the payload of a message in a Hermes topic using the Hermes Messaging Service topic inspector.

시작하기 전에

Role required: hermes_admin, kafka_namespace_admin, or admin

중요사항:

Administrators with the kafka_namespace_admin role can view message data across different domains.

이 태스크 정보

주:

Messages expire after 36 hours.

프로시저

1. Navigate to All > Hermes Messaging Service > Topic inspector.
2. Select a cluster set with topics that you want to view in the Select Service drop-down list.
3. Select List Topics.
   The primary cluster, the secondary cluster, and the number of topics on the instance are listed above the table of topics.
4. 옵션: View messages from all partitions.
   1. Select a topic row in the table.
   2. 옵션: Retrieve messages from all clusters or a specific cluster using the Select Data center drop-down list.
   3. 옵션: Retrieve messages received in a specific date range using the Message start date (UTC) and Message end date (UTC) fields.
   4. 옵션: Search for a specific message in the partition by entering a keyword or regular expression in the Message body filter field.
      주:

      The message filter only supports string searches of text data. You can't search for messages with binary payloads.
   5. Select Inspect Topic.
5. 옵션: View messages in a specific partition.
   1. View the list of partitions by selecting Load Partition Info.
   2. Select a partition with messages that you want to retrieve in the Read from Partition drop-down list.
   3. 옵션: Retrieve messages from all clusters or a specific cluster using the Select Data center drop-down list.
   4. 옵션: Retrieve messages received in a specific date range using the Message start date (UTC) and Message end date (UTC) fields.
   5. 옵션: Search for a specific message in the partition by filtering the Message body filter field using a keyword or regular expression.
      주:

      The message filter only supports string searches of text data. You can't search for messages with binary payloads.
   6. Select Inspect Topic.
6. 옵션: Track message processing for each consumer by selecting View Consumer Info.
7. 옵션: View audit history for a topic by selecting Audit Info.
   The Hermes Topic Audit Records [hermes_topic_audit_records] table displays an audit trail of topic changes, including the type of operation performed, the originating instance as Principal Name, and the timestamp for each change. Audit history is refreshed every 30 minutes.
8. View the message details and payload.
   주:

   To view headers, keys, or messages that are greater than 20 characters, select the View link or download the data.

   표 1. Message details

   Field	Description
   Offset	The Hermes Kafka cluster's datacenter identifier and the position of the message in the partition.
   Partition	Partition of the topic where the message is stored.
   Timestamp	Date and time when the message was created.
   Headers	Message header.
   Key	Message key.
   Payload	Message body contents. Note the following information about the message payload: The topic inspector automatically replaces some characters with escape characters in message payload text data. The message size that is displayed is the size of the payload as viewed in the topic inspector and not necessarily the size of the message as it exists in the Hermes Kafka cluster.