The following list of request parameters only lists interface request parameters and some public parameters, For a complete list of public parameters see public request parameters.

Parameter name	Required	Allow NULL	Type	Description
Action	Yes	No	String	Public parameter, The value of this interface: TerminateHosts
Version	Yes	No	String	Public parameter, The value of this interface: 2017-03-12
Region	No	No	String	Public parameter,Regional information A list of supported geographies is available through the DescribeRegions interface
HostIds	Yes	No	Array of String	One or more CDH instance IDs to be operated. Example: ["host-ey16rkyg\r\n"]
DryRun	No	No	Bool	Whether to skip the actual execution logic. Example: DesAction

3. Output Parameters

Parameter name	Type	Description
TaskId	String	Task ID Example: 543225
flowId	Int64	Task Flow ID Example: 2
FlowId	Int64	Task Flow ID Example: 2
RequestId	String	Unique request id, Each request will return. The RequestId of the request needs to be provided when locating the problem.

4. Error Code

The following lists only the error codes related to the interface business logic, For other error codes, see public ErrorCode.

Error Code	Description
InvalidHostId.NotFound	The specified HostId does not exist, or does not belong to the requesting account.
InvalidHostId.Malformed	Invalid CDH ID. The format of the specified CDH ID is incorrect, for example, an ID length error `host-1122`.
MissingParameter	Parameters are missing. The request did not include mandatory parameters.
InvalidHost.NotSupported	The specified operation is not supported by this host instance.