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TDMQ for MQTT

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プライバシーポリシー
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ドキュメントTDMQ for MQTT

Message Trace Description

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最終更新日: 2026-04-01 16:30:54
A message trace records the entire process of a message from the producer side to the TDMQ for MQTT server side, and finally to the consumer side, including the time of each stage, execution results, producer IP addresses, and consumer IP addresses.

Message Trace Description

On the Message Details page (for the entry, see Querying Normal Messages), click the Message Trace tab to view the production and consumption trace of the message. If the target message trace is not found, you can narrow the search scope by specifying a precise time and using the client ID search on the right.
Producing Messages
Parameter
Description
Request Time
Time when the publisher client (producer) sends a request packet to the server.
Request Packet Type
Request packet type:
PUBLISH: Publishes a message. If a client publishes a message to a topic with the retain feature enabled, two PUBLISH packets appear in the message production trace corresponding to this message under that topic, one of which is a Retain message trace record.
PUBACK: Publish acknowledgement, an acknowledgment response to PUBLISH packets at QoS level 1.
PUBREC: Publish received, the first acknowledgment at QoS level 2, indicating that a QoS 2 message is received.
PUBREL: Publish released, the second step at QoS level 2. It is the sender's response to PUBREC, indicating a request to release the message that was preliminarily acknowledged earlier.
PUBCOMP: Publish complete, the final acknowledgment at QoS level 2, indicating that the entire message delivery process for the QoS 2 message is fully completed.
Client ID
Unique identifier of the client that published this message, used to trace the source of the message.
QoS
The Quality of Service (QoS) level of a message determines the reliability and guarantee of message delivery, including 0 (at most once), 1 (at least once), and 2 (exactly once).
Request Result
Server's processing result for the message publishing request.
Message Consumption
Parameter
Description
Client ID
Unique identifier of the target client to which the server delivers the message.
QoS
The Quality of Service (QoS) level of a message determines the reliability and guarantee of message delivery, including 0 (at most once), 1 (at least once), and 2 (exactly once).
Last Push Time
Time when the server last pushed the message to the client.
Request Result
Final result of the server's message delivery attempt.
Click the right-pointing triangle below the client ID to view the request details of the server pushing this message.
Parameter
Description
Request Time
Time when the server sends the request packet to the target client (consumer).
Request Packet Type
Request packet type:
PUBLISH: Publish message.
PUBACK: Publish acknowledgement, an acknowledgment response to PUBLISH packets at QoS level 1.
PUBREC: Publish received, the first acknowledgment at QoS level 2, indicating that a QoS 2 message is received.
PUBREL: Publish released, the second step at QoS level 2. It is the sender's response to PUBREC, indicating a request to release the message that was preliminarily acknowledged earlier.
PUBCOMP: Publish complete, the final acknowledgment at QoS level 2, indicating that the entire message delivery process for the QoS 2 message is fully completed.
Request Result
Processing result of the client for the message delivery request.



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