Querying a Specified Consumer Group

Function

This API is used to query a specified consumer group.

Calling Method

For details, see Calling APIs.

URI

GET /v2/{engine}/{project_id}/instances/{instance_id}/groups/{group}

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
engine	Yes	String	Engine.
project_id	Yes	String	Project ID. For details, see Obtaining a Project ID.
instance_id	Yes	String	Instance ID.
group	Yes	String	Filter query by consumer group name.

Request Parameters

None

Response Parameters

Status code: 200

**Table 2** Response body parameters
Parameter	Type	Description
group	group object	Consumer group information.

**Table 3** group
Parameter	Type	Description
group_id	String	Consumer group name.
state	String	Consumer group status. The value can be: Dead: The consumer group has no members and no metadata. Empty: The consumer group has metadata but has no members. PreparingRebalance: The consumer group is to be rebalanced. CompletingRebalance: All members have jointed the group. Stable: Members in the consumer group can consume messages normally.
coordinator_id	Integer	Coordinator ID.
members	Array of members objects	Consumer list.
group_message_offsets	Array of group_message_offsets objects	Consumer offset.
assignment_strategy	String	Partition assignment policy.

**Table 4** members
Parameter	Type	Description
host	String	Consumer address.
member_id	String	Consumer ID.
client_id	String	Client ID.

**Table 5** group_message_offsets
Parameter	Type	Description
partition	Integer	Partition number.
lag	Long	Number of remaining messages that can be retrieved, that is, the number of accumulated messages.
topic	String	Topic name.
message_current_offset	Long	Consumer offset.
message_log_end_offset	Long	Log end offset (LEO).

Example Requests

GET https://{endpoint}/v2/{engine}/{project_id}/instances/{instance_id}/groups/{group}

Example Responses

Status code: 200

Successful

{
  "group" : {
    "members" : [ {
      "host" : "/172.31.1.102",
      "member_id" : "consumer-1-6b8ee551-d499-47d4-9beb-ba1527496785",
      "client_id" : "consumer-1"
    } ],
    "state" : "STABLE",
    "group_id" : "test-consumer-group",
    "coordinator_id" : 2,
    "group_message_offsets" : [ {
      "partition" : 0,
      "lag" : 31396,
      "topic" : "test",
      "message_current_offset" : 935,
      "message_log_end_offset" : 32331
    }, {
      "partition" : 0,
      "lag" : 0,
      "topic" : "aaaa",
      "message_current_offset" : 0,
      "message_log_end_offset" : 0
    }, {
      "partition" : 1,
      "lag" : 31279,
      "topic" : "test",
      "message_current_offset" : 1058,
      "message_log_end_offset" : 32337
    }, {
      "partition" : 1,
      "lag" : 0,
      "topic" : "aaaa",
      "message_current_offset" : 0,
      "message_log_end_offset" : 0
    }, {
      "partition" : 2,
      "lag" : 31603,
      "topic" : "test",
      "message_current_offset" : 739,
      "message_log_end_offset" : 32342
    } ],
    "assignment_strategy" : "range"
  }
}