Queries unhealthy instances.


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 DescribeUnhealthyHostAvailability

The operation that you want to perform. Set the value to DescribeUnhealthyHostAvailability.

Id.N RepeatList No 12346

The ID of the availability monitoring task. Valid values of N: 1 to 20.

Response parameters

Parameter Type Example Description
Code String 200

The HTTP status code. The status code 200 indicates that the call was successful.

Message String success

The returned message.

RequestId String ACBDBB40-DFB6-4F4C-8957-51FFB233969C

The ID of the request.

Success Boolean true

Indicates whether the call was successful.

UnhealthyList N/A N/A

The unhealthy instances monitored by all specified availability monitoring tasks.

Id Long 123

The ID of the availability monitoring task.

InstanceList N/A i-a34b581****

The unhealthy instances monitored by the availability monitoring task.


Sample requests

http(s)://[Endpoint]/? Action=DescribeUnhealthyHostAvailability
&<Common request parameters>

Sample success responses

XML format


JSON format


Error codes

For a list of error codes, visit the API Error Center.