因此，我试图通过从nest @nestjs/common导入的HttpException模块将403 Forbidden错误从微服务抛出到网关，但nest一直将其作为500内部服务器错误抛出。
生成的错误的JSON.stringify为：

{"response":"User already exists","status":403,"message":"User already exists","name":"HttpException"}

网关中显示的错误为：

[Nest] 4747  - 11/06/2022, 18:01:58   ERROR [ExceptionsHandler] Internal server error
[Nest] 4747  - 11/06/2022, 18:01:58   ERROR [ExceptionsHandler] undefined

你知道这是怎么回事吗
下面是抛出错误的服务：

import { Model } from 'mongoose';
import {
  Injectable,
  Inject,
  ForbiddenException,
  HttpException,
  HttpStatus,
} from '@nestjs/common';
import { InjectModel } from '@nestjs/mongoose';

import { User, UserDocument } from './schemas/user.schema';

@Injectable()
export class AccountManagementService {
  constructor(@InjectModel(User.name) private userModel: Model<UserDocument>) {}
  async createUser(user: any): Promise<any> {
    const existingUser = await this.userModel.find({
      $or: [{ username: user.username }, { email: user.email }],
    });
    if (existingUser) {
      throw new HttpException('User already exists', HttpStatus.FORBIDDEN);
    }
    const createdUser = new this.userModel(user);
    return createdUser.save();
  }
}

这是控制器：

import { Controller, Post } from '@nestjs/common';
import { MessagePattern } from '@nestjs/microservices';
import { AccountManagementService } from './account-management.service';

@Controller()
export class AccountManagementController {
  constructor(
    private accountManagementService: AccountManagementService,
  ) {}

  @MessagePattern({ cmd: 'createUser' })
  async createUser(userData: any): Promise<any> {
    return this.accountManagementService
      .createUser(userData)
  }
}