Querying the Message Trace

Function

This API is used to query the message trace.

URI

GET /v2/{engine}/{project_id}/instances/{instance_id}/trace

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
engine	Yes	String	Definition Message engine. Constraints N/A Range N/A Default Value reliability
project_id	Yes	String	Definition Project ID. For details about how to obtain it, see Obtaining a Project ID. Constraints N/A Range N/A Default Value N/A
instance_id	Yes	String	Definition Instance ID. You can call the API for querying all instances to obtain the instance ID. The instance ID is in the response body. Constraints N/A Range N/A Default Value N/A

**Table 2** Query Parameters
Parameter	Mandatory	Type	Description
msg_id	Yes	String	Definition Message ID. Constraints N/A Range N/A Default Value N/A

Request Parameters

None

Response Parameters

Status code: 200

**Table 3** Response body parameters
Parameter	Type	Description
total	Number	Definition Total number. Constraints N/A Range N/A Default Value N/A
next_offset	Integer	Definition Offset of the next page. Constraints N/A Range N/A Default Value N/A
previous_offset	Integer	Definition Offset of the previous page. Constraints N/A Range N/A Default Value N/A
trace	Array of trace objects	Definition Message trace list. Constraints N/A Range N/A Default Value N/A

**Table 4** trace
Parameter	Type	Description
success	Boolean	Definition Successful or not. Constraints N/A Range true: successful false: failed Default Value N/A
trace_type	String	Definition Trace type. Constraints N/A Range Pub: The producer successfully sends messages. SubBefore: The consumer is ready to consume messages. SubAfter: The consumer finishes consuming messages. EndTransaction: Transactional messages are committed or rolled back. Receive: The service side receives messages. Ack: The consumer manually acknowledges consumption. Default Value N/A
timestamp	Number	Definition Time. Constraints N/A Range N/A Default Value N/A
group_name	String	Definition Producer group or consumer group. Constraints N/A Range N/A Default Value N/A
cost_time	Number	Definition Duration. Constraints N/A Range N/A Default Value N/A
request_id	String	Definition Request ID. Constraints N/A Range N/A Default Value N/A
consume_status	Number	Definition Consumption status. Constraints N/A Range 0: Successful 1: Timeout 2: Exception 3: Null 5: Failed Default Value N/A
topic	String	Definition Topic name. Constraints N/A Range N/A Default Value
msg_id	String	Definition Message ID. Constraints N/A Range N/A Default Value N/A
offset_msg_id	String	Definition Offset message ID. Constraints N/A Range N/A Default Value N/A
tags	String	Definition Message tag. Constraints N/A Range N/A Default Value N/A
keys	String	Definition Message keys. Constraints N/A Range N/A Default Value N/A
store_host	String	Definition IP address of the host that stores the message. Constraints N/A Range N/A Default Value N/A
client_host	String	Definition IP address of the host that generates the message. Constraints N/A Range N/A Default Value N/A
retry_times	Integer	Definition Number of retry times. Constraints N/A Range N/A Default Value N/A
body_length	Number	Definition Message body length. Constraints N/A Range N/A Default Value N/A
msg_type	String	Definition Message type. Constraints N/A Range Normal_Msg: normal message Trans_Msg_Half: half message Trans_msg_Commit: delivered message Delay_Msg: delayed message Order_Msg: ordered message Default Value N/A
transaction_state	String	Definition Transaction status. Constraints N/A Range COMMIT_MESSAGE ROLLBACK_MESSAGE UNKNOW Default Value N/A
transaction_id	String	Definition Transaction ID. Constraints N/A Range N/A Default Value N/A
from_transaction_check	Boolean	Definition Whether the response is a transaction check response. Constraints N/A Range true: Yes false: No Default Value N/A

Example Requests

Querying the message trace of a RocketMQ instance

GET https://{endpoint}/v2/{engine}/{project_id}/instances/{instance_id}/trace?msg_id={msg_id}

Example Responses

Status code: 200

The query is successful.

{
  "total" : 1,
  "next_offset" : -1,
  "previous_offset" : -1,
  "trace" : [ {
    "success" : true,
    "trace_type" : "Pub",
    "timestamp" : 1634822858013,
    "group_name" : "ProducerGroupName",
    "cost_time" : 47,
    "request_id" : "644F0069C829287CBBF26B9A54390000",
    "consume_status" : 0,
    "topic" : "aaaaa",
    "msg_id" : "7F000001561018B4AAC26B9A0D1D0004",
    "offset_msg_id" : "C0A8011700002774000000000000BE12",
    "tags" : "TagA",
    "keys" : "OrderID188",
    "store_host" : "192.168.0.1:10101",
    "client_host" : "127.0.0.1",
    "retry_times" : 0,
    "body_length" : 11,
    "msg_type" : "Normal_Msg",
    "transaction_state" : "Ack",
    "transaction_id" : "xxxxxx",
    "from_transaction_check" : false
  } ]
}