GetApplication - E-MapReduce - Alibaba Cloud Documentation Center

Retrieves the details of an application.

Debugging

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Debug

Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

Operation: the value that you can use in the Action element to specify the operation on a resource.
Access level: the access level of each operation. The levels are read, write, and list.
Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
- For mandatory resource types, indicate with a prefix of * .
- If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
Condition Key: the condition key that is defined by the cloud service.
Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.

Operation	Access level	Resource type	Condition key	Associated operation
emr:GetApplication	get	All Resources ``	none	none

Request parameters

Parameter	Type	Required	Description	Example
RegionId	string	Yes	The region ID.	cn-hangzhou
ClusterId	string	Yes	The request ID.	c-e6a9d46e92675****
ApplicationName	string	Yes	The application name.	HDFS

Response parameters

Parameter	Type	Description	Example
	object	The returned result.
Application	object	The application.
ApplicationName	string	The application name.	HDFS
ApplicationVersion	string	The application version.	2.8.1
CommunityVersion	string	The community version.	2.8.1
Actions	array<object>	The list of actions supported by the application.
Action	object	The action that you want to perform on requests that match the rule.
RunActionScope	string	The execution scope. Valid values: APPLICATION: the application scope. COMPONENT: the component scope. COMPONENT_INSTANCE: the component instance scope.	COMPONENT_INSTANCE
ComponentName	string	The component name.	DataNode
ActionName	string	The action name.	decommission
Description	string	The description of the action.
Command	string	The action command.	decommission
ActionParams	array<object>	The list of action parameters.
ActionParam	object	The parameters of the action.
Key	string	The parameter name.	timeout
ValueAttribute	object	The parameter value attribute.
ValueType	string	The value type of the column.	int
ValueMaximum	string	The maximum range of values.	100
ValueMinimum	string	The minimum range of values.	1
ValueUnit	string	The unit of the value.
ValueIncrementStep	string	The size of the value increment.	1
Description	string	Value description.
Description	string	Description
ApplicationState	string	The status of the application.	RUNNING
RequestId	string	The request ID.	9E3A7161-EB7B-172B-8D18-FFB06BA3****

Examples

Sample success responses

JSONformat

{
  "Application": {
    "ApplicationName": "HDFS",
    "ApplicationVersion": "2.8.1",
    "CommunityVersion": "2.8.1",
    "Actions": [
      {
        "RunActionScope": "COMPONENT_INSTANCE",
        "ComponentName": "DataNode",
        "ActionName": "decommission",
        "Description": "",
        "Command": "decommission",
        "ActionParams": [
          {
            "Key": "timeout",
            "ValueAttribute": {
              "ValueType": "int",
              "ValueMaximum": 100,
              "ValueMinimum": 1,
              "ValueUnit": "",
              "ValueIncrementStep": 1,
              "Description": ""
            },
            "Description": ""
          }
        ]
      }
    ],
    "ApplicationState": "RUNNING"
  },
  "RequestId": "9E3A7161-EB7B-172B-8D18-FFB06BA3****"
}

Error codes

HTTP status code	Error code	Error message
400	InvokeEcmError	An error occurred while invoking ECM service.
400	NotFound.Cluster	The cluster is not found.
400	ConflictParameters	Parameters that must not be used together. %s
400	IncompleteSignature	The request signature is invalid.
400	InvalidAction	The action %s requested is invalid.
400	InvalidParameter	The specified parameter %s is not valid.
400	InvalidParameterValue	The input parameter %s is invalid or out of range.
400	MissingAction	The action %s requested is missing.
400	MissingParameter	The input parameter %s that is mandatory for processing this request is not supplied.
400	NotAuthorized	You do not have permission to perform this action. %s
400	ThrottlingException	The request was denied due to request throttling. %s
404	ResourceNotFound	The resource not found by %s.
500	InternalError	The request processing has failed due to some unknown error, exception or failure.
503	ServiceFailure	The request has failed due to a temporary failure of %s service.
503	ServiceUnavailable	The request has failed due to a temporary failure of the server.

For a list of error codes, visit the Service error codes.