RestartHpoTrials - Platform For AI - Alibaba Cloud Documentation Center

Restarts failed trials in an hyperparameter optimization (HPO) experiment. The system extracts the configuration of the hyperparameters of a specific trial. If none of the trials that use this configuration are successful in the experiment, the system restarts trials by using this configuration.

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
paiautoml:RestartHpoTrials	update	All Resources ``	none	none

Request syntax

POST /api/automl/v1/hpo/experiment/{ExpId}/restart_trials HTTP/1.1

Request parameters

Parameter	Type	Required	Description	Example
ExperimentId	string	No	The ID of the experiment.	abcde
body	object	No	The request body. You must specify one of the TrialIds and TrialHyperParameters parameters. If you leave both parameters empty, no operation is performed on the server. If you specify both parameters, the TrialIds parameter prevails.
TrialIds	array	No	The IDs of the trials that you want to restart.
	string	No	hpo trial ids	[xrYq99, xrYq9N]
TrialHyperParameters	string	No	A new hyperparameter configuration of a trial. The system starts a new trial by using this configuration.	‘{"${batch_size}": "32", "${lr}": "0.01"}'

Response parameters

Parameter	Type	Description	Example
	object	Schema of Response
RequestId	string	The ID of the POP request.	3F190916-B3E5-5D1E-AD0C-35C0DF105F51
Code	string	The internal error code. This parameter is returned if an exception occurred.	INVALID_USER_OR_EXP
Message	string	The error message. This parameter is returned if an exception occurred.	Missing 'user_id' in request.
AccessDeniedDetail	object	The details about the failed permission verification.
	string	The details about the failed permission verification.	{ "AuthPrincipalType": "sub", "PolicyType": "AccountLevelIdentityBasedPolicy", "NoPermissionType": "NoPermission" }
Results	object	The information that contains the trial ID and the trial status.	{ 'xrYq99': TrialJobInfo text, 'xrYq9N':TrialJobInfo text }

Examples

Sample success responses

JSONformat

{
  "RequestId": "3F190916-B3E5-5D1E-AD0C-35C0DF105F51",
  "Code": "INVALID_USER_OR_EXP",
  "Message": "Missing 'user_id' in request.",
  "AccessDeniedDetail": {
    "key": {
      "AuthPrincipalType": "sub",
      "PolicyType": "AccountLevelIdentityBasedPolicy",
      "NoPermissionType": "NoPermission"
    }
  },
  "Results": {
    "test": "test",
    "test2": 1
  }
}

Error codes

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

Change history

Change time	Summary of changes	Operation
2024-10-21	The response structure of the API has changed	View Change Details