| 400 | InstanceInit | instance is initing | The instance is being created. | diagnosis |
| 400 | ClusterNoIndex | cluster has not index | No indexes have been loaded to the cluster. | diagnosis |
| 400 | InvalidDataSourceType | data source type is invalid | Invalid data source type. | diagnosis |
| 400 | IndexAlreadyExist | index already exist | - | diagnosis |
| 400 | ha3.UpgradeInvalidSpec | Upgrade spec is invalid | The specifications after scale-up are invalid. | diagnosis |
| 400 | IndexExceed | index exceed | The maximum number of indexes for data sources has been exceeded. | diagnosis |
| 400 | InvalidRequestParameter | invalid request parameter | Invalid request parameter. | diagnosis |
| 400 | InternalServerError | internal server error | An internal server error occurred. | diagnosis |
| 400 | InvalidParameter | invalid parameter | Invalid parameter. | diagnosis |
| 400 | InvalidOrder | invalid order | Invalid order. | diagnosis |
| 400 | ha3.InvalidContainerSpec | Invalid containerSpec | Invalid configuration. | diagnosis |
| 400 | ha3.DownGradeInvalidSpec | down grade invalid spec | The specifications after scale-down are invalid. | diagnosis |
| 400 | ha3.InvalidOrderType | invalid order type | Invalid order type. | diagnosis |
| 400 | ha3.DownGradeForbiddenWhenUpdating | down grade forbidden when updating | Scale-down is not allowed while an update is in progress. | diagnosis |
| 400 | ha3.DownGradeForbiddenWhenBuildIndex | down grade forbidden when build index | Scale-down is not allowed while an index is being created. | diagnosis |
| 400 | ha3.DownGradeForbiddenLessNode | down grade forbidden less node | At least one node must be retained after scale-down. | diagnosis |
| 400 | ha3.VpcEmpty | vpc Empty | A VPC must be specified. | diagnosis |
| 400 | UserNotExist | user not exist | The user is not found. | diagnosis |
| 400 | InstanceNotExist | instance not exit | The instance is not found. | diagnosis |
| 400 | NodeNotExist | node not exist | The node is not found. | diagnosis |
| 400 | QueryNodeNotExist | query node not exist | The search node is not found. | diagnosis |
| 400 | DataNodeNotEnough | data node not enough | Insufficient data nodes. | diagnosis |
| 400 | DataSourceNotExist | data source not exist | The data source is not found. | diagnosis |
| 400 | DataSourceHasExist | data source has exist | The data source already exists. | diagnosis |
| 400 | DataSourcePartitionNotExist | data source partition not exist | The data source partition is not found. | diagnosis |
| 400 | DataSourceNameInvalid | data source name invalid | Invalid data source name. | diagnosis |
| 400 | DataSourceInfoInvalid | data source info invalid | Invalid data source information. | diagnosis |
| 400 | DataSourceExceed | data source exceed | The data source has exceeded the limit. | diagnosis |
| 400 | ClusterNotExist | cluster not exist | The cluster is not found. | diagnosis |
| 400 | ClusterInitializing | cluster initializing | The cluster is being initialized. | diagnosis |
| 400 | ClusterMinCount | cluster min count | The number of clusters must meet the least requirement. | diagnosis |
| 400 | FileNotExist | file not exist | The file is not found. | diagnosis |
| 400 | ConfigInUse | config in use | The configuration is in use. | diagnosis |
| 400 | ConfigPublishTaskRunning | config publish task running | A configuration publish task is in progress. | diagnosis |
| 400 | IndexInUse | index in use | The index is in use. | diagnosis |
| 400 | IndexSchemaInvalid | index schema invalid | Invalid index schema. | diagnosis |
| 400 | LackQueryNode | lack query node | Insufficient search node resources. | diagnosis |
| 400 | QuerySearchEngineError | query search engine error | An error occurred while querying the search engine. | diagnosis |
| 400 | LackDataNode | lack data node | Insufficient data node resources. | diagnosis |
| 400 | DataSourceCreating | data source creating | A process for creating data sources is still in progress. | diagnosis |
| 400 | DataSourceIndexCreating | data source index creating | A process of creating indexes for the data source is still in progress. | diagnosis |
| 400 | ha3.UpgradeInvalidSpec | upgrade spec is invalid | The specifications after scale-up are invalid. | diagnosis |