> ## Documentation Index > Fetch the complete documentation index at: https://docs.eorion.com/llms.txt > Use this file to discover all available pages before exploring further. # 根据Id获取 > Retrieves a historic external task log by id. ## OpenAPI ````yaml GET /history/external-task-log/{id} openapi: 3.0.2 info: title: ORION Platform REST API description: OpenApi Spec for ORION Camunda Platform REST API. version: 7.22.6-ee license: name: Apache License 2.0 url: http://www.apache.org/licenses/LICENSE-2.0.html servers: - url: http://{host}:{port}/{contextPath} description: The API server for the default process engine variables: host: default: localhost port: default: '8080' contextPath: default: engine-rest - url: http://{host}:{port}/{contextPath}/engine/{engineName} description: The API server for a named process engine variables: host: default: localhost port: default: '8080' contextPath: default: engine-rest engineName: default: default - url: '{url}' description: The API server with a custom url variables: url: default: '' security: - basicAuth: [] tags: - name: Authorization - name: Batch - name: Condition - name: Decision Definition - name: Decision Requirements Definition - name: Deployment - name: Engine - name: Event Subscription - name: Execution - name: External Task - name: Filter - name: Group - name: Historic Activity Instance - name: Historic Batch - name: Historic Decision Definition - name: Historic Decision Instance - name: Historic Decision Requirements Definition - name: Historic Detail - name: Historic External Task Log - name: Historic Identity Link Log - name: Historic Incident - name: Historic Job Log - name: Historic Process Definition - name: Historic Process Instance - name: Historic Task Instance - name: Historic User Operation Log - name: Historic Variable Instance - name: History Cleanup - name: Identity - name: Incident - name: Job - name: Job Definition - name: Message - name: Metrics - name: Migration - name: Modification - name: Process Definition - name: Process Instance - name: Signal - name: Schema Log - name: Task - name: Task Attachment - name: Task Comment - name: Task Identity Link - name: Task Local Variable - name: Task Variable - name: Telemetry - name: Tenant - name: User - name: Variable Instance - name: Version externalDocs: description: Find out more about ORION Rest API url: https://docs.eorion.com paths: /history/external-task-log/{id}: get: tags: - Historic External Task Log summary: Get External Task Log description: Retrieves a historic external task log by id. operationId: getHistoricExternalTaskLog parameters: - name: id in: path schema: type: string required: true description: The id of the log entry. responses: '200': content: application/json: schema: $ref: '#/components/schemas/HistoricExternalTaskLogDto' examples: example-1: summary: Status 200. description: GET `/history/external-task-log/someId` value: id: someId timestamp: 2017-01-15T15:22:20.000+0200 externalTaskId: anExternalTaskId topicName: aTopicName workerId: aWorkerId retries: 3 priority: 5 errorMessage: An error occured! activityId: externalServiceTask activityInstanceId: externalServiceTask:15 executionId: anExecutionId processInstanceId: aProcessInstanceId processDefinitionId: aProcessDefinitionId processDefinitionKey: aProcessDefinitionKey tenantId: null creationLog: false failureLog: true successLog: false deletionLog: false removalTime: 2018-02-10T14:33:19.000+0200 rootProcessInstanceId: aRootProcessInstanceId description: Request successful. '404': content: application/json: schema: $ref: '#/components/schemas/ExceptionDto' description: >- Historic external task log with given id does not exist. See the [Introduction](https://docs.camunda.org/manual/7.22/reference/rest/overview/#error-handling) for the error response format. components: schemas: HistoricExternalTaskLogDto: type: object properties: id: type: string nullable: true description: The id of the log entry. externalTaskId: type: string nullable: true description: The id of the external task. timestamp: type: string format: date-time nullable: true description: The time when the log entry has been written. topicName: type: string nullable: true description: The topic name of the associated external task. workerId: type: string nullable: true description: The id of the worker that posessed the most recent lock. retries: type: integer format: int32 nullable: true description: The number of retries the associated external task has left. priority: type: integer format: int64 nullable: true description: >- The execution priority the external task had when the log entry was created. errorMessage: type: string nullable: true description: >- The message of the error that occurred by executing the associated external task. activityId: type: string nullable: true description: >- The id of the activity on which the associated external task was created. activityInstanceId: type: string nullable: true description: >- The id of the activity instance on which the associated external task was created. executionId: type: string nullable: true description: The execution id on which the associated external task was created. processInstanceId: type: string nullable: true description: >- The id of the process instance on which the associated external task was created. processDefinitionId: type: string nullable: true description: >- The id of the process definition which the associated external task belongs to. processDefinitionKey: type: string nullable: true description: >- The key of the process definition which the associated external task belongs to. tenantId: type: string nullable: true description: >- The id of the tenant that this historic external task log entry belongs to. creationLog: type: boolean nullable: true description: >- A flag indicating whether this log represents the creation of the associated external task. failureLog: type: boolean nullable: true description: >- A flag indicating whether this log represents the failed execution of the associated external task. successLog: type: boolean nullable: true description: >- A flag indicating whether this log represents the successful execution of the associated external task. deletionLog: type: boolean nullable: true description: >- A flag indicating whether this log represents the deletion of the associated external task. removalTime: type: string format: date-time nullable: true description: >- The time after which this log should be removed by the History Cleanup job. Default format `yyyy-MM-dd'T'HH:mm:ss.SSSZ`. For further information, please see the [documentation](https://docs.camunda.org/manual/7.22/reference/rest/overview/date-format/) rootProcessInstanceId: type: string nullable: true description: >- The process instance id of the root process instance that initiated the process containing this log. ExceptionDto: title: ExceptionDto type: object properties: type: type: string nullable: true description: An exception class indicating the occurred error. message: type: string nullable: true description: A detailed message of the error. code: type: number description: >- The code allows your client application to identify the error in an automated fashion. You can look up the meaning of all built-in codes and learn how to add custom codes in the [User Guide](https://docs.camunda.org/manual/7.22/user-guide/process-engine/error-handling/#exception-codes). securitySchemes: basicAuth: type: http scheme: basic ````