Removes host groups from a cluster.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes ReleaseClusterHostGroup

The operation that you want to perform. This parameter is required for API requests that you initiate by piecing together HTTP or HTTPS URLs. Set the value to ReleaseClusterHostGroup.

ClusterId String Yes C-D7958B72E59B****

The ID of the cluster. You can call the ListClusters to view the ID of the cluster.

HostGroupId String Yes G-EF460256A55F****

The ID of the host group. You can call the ListClusterHostGroup to view the machine group ID.

RegionId String Yes cn-hangzhou

The region ID of the security group. You can call the DescribeRegions operation to query the most recent region list.

InstanceIdList String No ["i-bp1bm7y86rscdx1a****"]

The ID of ECS instance N.

ReleaseNumber Integer No 2

The number of scales in.

EnableGracefulDecommission Boolean No true

Whether to enable YARN graceful offline:

  • true: no.
  • false: Yes.

<note> This feature is enabled only for the TASK node group of the HADOOP cluster. </note>

DecommissionTimeout Integer No 3600

The timeout period for graceful unpublishing. Unit: seconds. Valid values: 0 to 3600.

Response parameters

Parameter Type Example Description
RequestId String 991B3409-6C8D-48CB-903C-3B9C166E17A8

The ID of the request.


Sample request

&<Common request parameters>

Sample success responses

XML format


JSON format