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E-MapReduce:ListUsers

Last Updated:Sep 08, 2025

Queries a user.

Operation description

Queries a user.

Debugging

You can run this interface directly in OpenAPI Explorer, saving you the trouble of calculating signatures. After running successfully, OpenAPI Explorer can automatically generate SDK code samples.

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.
OperationAccess levelResource typeCondition keyAssociated operation
emr:ListUserslist
*All Resources
*
    none
none

Request parameters

ParameterTypeRequiredDescriptionExample
RegionIdstringYes

The region ID.

cn-hangzhou
ClusterIdstringYes

The cluster ID.

c-b933c5aac8fe****
NextTokenstringNo

The pagination token that is used in the request to retrieve a new page of results.

DD6B1B2A-5837-5237-ABE4-FF0C89568980
MaxResultsintegerNo

The maximum number of entries to return.

20
UserNamestringNo

The username. Fuzzy match is supported.

test
UserNamesarrayNo

The usernames. Number of elements in the array: 0 to 20.

stringNo

The username.

xi

Response parameters

ParameterTypeDescriptionExample
object

The response parameters.

IsAdmindeprecatedboolean

Indicates whether the user is an admin user. Valid values:

  • true
  • false
False
Usersarray<object>

The users.

Userobject
LdapUrlstring

The Lightweight Directory Access Protocol (LDAP) link.

ldap://master-1-1.c-c6ce2d16d118****.cn-hangzhou.emr.aliyuncs.com:10389
UserIdstring

The user ID.

125046002175****
UserNamestring

The username.

yun****
KeytabHexstring

The Base64-encoded content of the keytab file.

DBEDASDF==
CreateTimelong

The creation time.

1509338726362
Descriptionstring

The remarks.

RequestIdstring

The request ID.

DD6B1B2A-5837-5237-ABE4-FF0C8944****
NextTokenstring

A pagination token. It can be used in the next request to retrieve a new page of results.

DD6B1B2A-5837-5237-ABE4-FF0C89568980
MaxResultsinteger

The maximum number of entries returned.

20
TotalCountinteger

The total number of entries returned.

200

Examples

Sample success responses

JSONformat

{
  "IsAdmin": true,
  "Users": [
    {
      "LdapUrl": "ldap://master-1-1.c-c6ce2d16d118****.cn-hangzhou.emr.aliyuncs.com:10389",
      "UserId": "125046002175****",
      "UserName": "yun****",
      "KeytabHex": "DBEDASDF==",
      "CreateTime": 1509338726362,
      "Description": ""
    }
  ],
  "RequestId": "DD6B1B2A-5837-5237-ABE4-FF0C8944****",
  "NextToken": "DD6B1B2A-5837-5237-ABE4-FF0C89568980",
  "MaxResults": 20,
  "TotalCount": 200
}

Error codes

HTTP status codeError codeError message
400ConflictParametersParameters that must not be used together. %s
400IncompleteSignatureThe request signature is invalid.
400InvalidActionThe action %s requested is invalid.
400InvalidParameterThe specified parameter %s is not valid.
400InvalidParameterValueThe input parameter %s is invalid or out of range.
400MissingActionThe action %s requested is missing.
400MissingParameterThe input parameter %s that is mandatory for processing this request is not supplied.
400NotAuthorizedYou do not have permission to perform this action. %s
400ThrottlingExceptionThe request was denied due to request throttling. %s
404ResourceNotFoundThe resource not found by %s.
500InternalErrorThe request processing has failed due to some unknown error, exception or failure.
503ServiceFailureThe request has failed due to a temporary failure of %s service.
503ServiceUnavailableThe request has failed due to a temporary failure of the server.

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