Last updated: 2020-03-20 17:30:56

1. API Description

Domain name for API request:

This API is used to query EMR instances.

A maximum of 20 requests can be initiated per second for this API.

2. Input Parameters

The following request parameter list only provides API request parameters and some common parameters. For the complete common parameter list, see Common Request Parameters.

Parameter Name Required Type Description
Action Yes String Common parameter. The value used for this API: DescribeInstances.
Version Yes String Common parameter. The value used for this API: 2019-01-03.
Region Yes String Common parameter. For more information, please see the list of regions supported by the product.
DisplayStrategy Yes String Cluster filtering policy. Valid values:
  • clusterList: queries the list of clusters except terminated ones.
  • monitorManage: queries the list of clusters except those that have been terminated, are being created, or failed to be created.
  • cloudHardwareManage/componentManage: reserved fields with the same meaning as monitorManage.
  • InstanceIds.N No Array of String Queries by one or more instance IDs in the format of emr-xxxxxxxx. For the format of this parameter, please see the id.N section in API Overview. If no instance ID is entered, the list of all instances under this APPID will be returned.
    Offset No Integer Page number. Default value: 0, indicating the first page.
    Limit No Integer Number of returned results per page. Default value: 10. Maximum value: 100
    ProjectId No Integer ID of the project to which the instance belongs. This parameter can be obtained from the projectId field in the return value of the DescribeProject API. If this value is -1, the list of all instances will be returned.
    OrderField No String Sorting field. Valid values:
  • clusterId: sorts by cluster ID.
  • addTime: sorts by instance creation time.
  • status: sorts by instance status code.
  • Asc No Integer Sorts according to OrderField in ascending or descending order. Valid values:
  • 0: descending order.
  • 1: ascending order.
  • Default value: 0.

    3. Output Parameters

    Parameter Name Type Description
    TotalCnt Integer Number of eligible instances.
    ClusterList Array of ClusterInstancesInfo List of EMR instance details.
    Note: this field may return null, indicating that no valid values can be obtained.
    TagKeys Array of String List of tag keys associated to an instance.
    Note: this field may return null, indicating that no valid values can be obtained.
    RequestId String The unique request ID, which is returned for each request. RequestId is required for locating a problem.

    4. Example

    Example1 Querying instance details

    Input Example
    &<common request parameters>

    Output Example

      "Response": {
        "ClusterList": [
            "AddTime": "2019-09-16 16:48:01",
            "AlarmInfo": "",
            "AppId": 251008830,
            "ChargeType": 1,
            "ClusterId": "emr-p9f700x8",
            "ClusterName": "beckwu_do not delete prepaid cluster",
            "Config": {
              "ChargeType": 1,
              "ComNodeSize": 0,
              "ComResource": {
                "Cpu": 0,
                "DiskSize": 0,
                "DiskType": "",
                "MemSize": 0,
                "RootSize": 0,
                "Spec": "",
                "SpecName": "",
                "StorageType": 0
              "CoreNodeSize": 2,
              "CoreResource": {
                "Cpu": 2,
                "DiskSize": 100,
                "DiskType": "CLOUD_BASIC",
                "MemSize": 8192,
                "RootSize": 0,
                "Spec": "CVM.S2",
                "SpecName": "EMR Standard S2",
                "StorageType": 2
              "MasterNodeSize": 1,
              "MasterResource": {
                "Cpu": 2,
                "DiskSize": 100,
                "DiskType": "CLOUD_BASIC",
                "MemSize": 8192,
                "RootSize": 0,
                "Spec": "CVM.S2",
                "SpecName": "EMR Standard S2",
                "StorageType": 2
              "OnCos": false,
              "SoftInfo": [
              "TaskNodeSize": 1,
              "TaskResource": {
                "Cpu": 2,
                "DiskSize": 100,
                "DiskType": "CLOUD_BASIC",
                "MemSize": 8192,
                "RootSize": 0,
                "Spec": "CVM.S2",
                "SpecName": "EMR Standard S2",
                "StorageType": 2
            "EmrVersion": "EMR-V3.0.0",
            "Ftitle": "Cluster is running",
            "Id": 19541,
            "IsTradeCluster": 0,
            "MasterIp": "--",
            "ProjectId": 0,
            "RegionId": 1,
            "ResourceOrderId": 0,
            "RunTime": "0 days 2 hours 48 minutes 55 seconds",
            "Status": 2,
            "SubnetId": 1230738,
            "TradeVersion": 1,
            "Uin": "1875765535",
            "VpcId": 78518,
            "ZoneId": 100002
        "RequestId": "4f337873-6fea-4338-9715-24f539b60949",
        "TotalCnt": 1

    5. Developer Resources

    API Explorer

    This tool allows online call, signature authentication, SDK code generation and quick search of APIs to greatly improve the efficiency of using TencentCloud APIs.


    TencentCloud API 3.0 integrates SDKs that support various programming languages to make it easier for you to call APIs.

    Command Line Interface

    6. Error Code

    The following only lists the error codes related to the API business logic. For other error codes, see Common Error Codes.

    Error Code Description
    InternalError Internal error.
    InvalidParameter Invalid parameter.
    InvalidParameter.DisplayStrategyNotMatch Incorrect display policy.
    InvalidParameter.InvalidClusterId Invalid parameter: ClusterId.
    InvalidParameter.OrderFieldNotMatch Invalid sorting field.
    ResourceNotFound.ClusterNotFound The instance was not found.
    ResourceNotFound.HardwareInfoNotFound No hardware information found.