HarmonyOS taskpool执行@Concurrent修饰的方法在访问主线程中的单例变量时，变量是空的

export class SelfHttpManage { 
  private httpUtil: HttpUtil | null = null; 
  getSelfHttp(): HttpUtil { 
    if (this.httpUtil) { 
      return this.httpUtil; 
    } 
    return new HttpUtil(CommonUrlManager.getInstance().getSelfInterface()); 
  } 
} 
const selfHttpManage = new SelfHttpManage(); 
export default selfHttpManage 
public static async uploadFile(fileUri: string, categoryId: VerifyUploadCategoryId, 
    basePageConfig?: BasePageConfig): Promise<FileUploadResModel> { 
    const params: VerifyUploadParam = { 
      userId: UserInfoManager.getUserId(), 
      categoryId: categoryId, 
      streamZip: '', 
      fileName: '', // 该值会在 concurrentUploadFile 方法中自动设置 
    } 
    const uploadParam : UploadFileConfig = { 
      fileUri: fileUri, path: SelfApi.verifyUpload, params: params, basePageConfig 
    } 
    const task = new taskpool.Task(concurrentUploadFile, uploadParam, selfHttpManage, getContext()); 
    const result = await taskpool.execute(task); 
    return result as FileUploadResModel; 
      } 
@Concurrent 
export async function concurrentUploadFile(uploadParam: UploadFileConfig, httpManage: SelfHttpManage, context: Context): Promise<FileUploadResModel> { 
  const compressedImageInfo = await ImageCompressionUtil.compressImg(uploadParam.fileUri, context); 
  const formData = new FormData(); 
  formData.append('image', 'internal://cache/' + compressedImageInfo.fileName, { filename: "image.jpg", type: 'multipart/form-data' }) 
  uploadParam.params.fileName = compressedImageInfo.fileName; 
  try { 
    const result = await httpManage.getSelfHttp() 
      .uploadFile<FileUploadResModel>({ 
        url: uploadParam.path, 
        context: CommonUtil.getContext(), 
        params: uploadParam.params, 
        data: formData, 
      }); 
    try { 
      fileIo.unlinkSync(compressedImageInfo.imageUri); 
      ToastUtil.showDebugToast(`文件上传结束，删除临时文件成功：${compressedImageInfo.imageUri}`); 
    } catch (e) { 
      ToastUtil.showDebugToast(`文件上传结束，删除临时文件失败：${compressedImageInfo.imageUri}， ${JSON.stringify(e)}`); 
    } 
    return result; 
  } catch (e) { 
    try { 
      fileIo.unlinkSync(compressedImageInfo.imageUri); 
      ToastUtil.showDebugToast(`文件上传结束，删除临时文件成功：${compressedImageInfo.imageUri}`); 
    } catch (e) { 
      ToastUtil.showDebugToast(`文件上传结束，删除临时文件失败：${compressedImageInfo.imageUri}， ${JSON.stringify(e)}`); 
    } 
    throw e as Error; 
  } 
} 
export interface UploadFileConfig { 
  fileUri: string, 
  path: string, 
  params: VerifyUploadParam, 
  basePageConfig?: BasePageConfig, 
}