Function

Kafka instances do not support resetting the consumer offset online. Before resetting, stop the client for which the offset is to be reset.After a client is stopped, the server considers the client offline only after the time period specified in ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG (1000 ms by default).

URI

POST /v2/{project_id}/instances/{instance_id}/management/groups/{group}/reset-message-offset

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID. For details about how to obtain it, see Obtaining a Project ID.
instance_id	Yes	String	Instance ID.
group	Yes	String	Consumer group name.

Request Parameters

**Table 2** Request body parameters
Parameter	Mandatory	Type	Description
topic	No	String	Topic name.
partition	Yes	Integer	Partition number. The default value is -1, indicating that all partitions are reset.
message_offset	No	Long	Resetting consumer group offset to the specified position. If this position is earlier than the current earliest offset, the offset will be reset to the earliest offset. If this offset is later than the current largest offset, the offset will be reset to the latest offset. Either message_offset or timestamp must be specified.
timestamp	No	Long	Specified time that the offset is to be reset to. The value is a Unix timestamp, in millisecond. If this time is earlier than the current earliest timestamp, the offset will be reset to the earliest timestamp. If this time is later than the current largest timestamp, the offset will be reset to the latest timestamp. Either message_offset or timestamp must be specified.

Response Parameters

None

Example Requests

Resetting consumer group offset to the specified position.

POST https://{endpoint}/v2/{project_id}/instances/{instance_id}/management/groups/{group}/reset-message-offset

{
  "topic" : "test",
  "partition" : 0,
  "message_offset" : 10
}

Resetting consumer group offset to the specified time.

POST https://{endpoint}/v2/{project_id}/instances/{instance_id}/management/groups/{group}/reset-message-offset

{
  "topic" : "test",
  "partition" : 0,
  "timestamp" : 1571812144000
}

Example Responses

None

Status Codes

Status Code	Description
204	The consumer group offset is successfully reset to the specified position.

Error Codes

See Error Codes.

Resetting Consumer Group Offset to the Specified Position