examples/03-microservices: Starting microservice without http server produce error

[unlight]

I'm submitting a...

[ ] Regression 
[x] Bug report
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

async function bootstrap() {
    const app = await NestFactory.create(ApplicationModule);
    const microservice = app.connectMicroservice({ transport: Transport.TCP, port: 43210 });
    await app.startAllMicroservicesAsync();
    // await app.listen(3000); // Is it required? Why?
}
bootstrap();

Service 1: got  { a: 1, b: 2 }
[Nest] 6232   - 2018-1-14 00:02:16   [RpcExceptionsHandler] Cannot read property 'send' of null
TypeError: Cannot read property 'send' of null
    at Service1Controller.doit (\nest-typescript-starter\app\hybrid-example\service1\service1.controller.ts:15:49)
    at RpcContextCreator.<anonymous> (\nest-typescript-starter\node_modules\@nestjs\microservices\context\rpc-context-creator.js:38:33)
    at Generator.next (<anonymous>)
    at fulfilled (\nest-typescript-starter\node_modules\@nestjs\microservices\context\rpc-context-creator.js:4:58)
    at <anonymous>
    at process._tickDomainCallback (internal/process/next_tick.js:228:7)

If I uncomment // await app.listen(3000); // Is it required? Why? -> no such error

Expected behavior

No errors.

Minimal reproduction of the problem with instructions

1. Repo https://github.com/unlight/nest-typescript-starter/tree/bug_2018_2
2. git clone https://github.com/unlight/nest-typescript-starter
3. cd nest-typescript-starter
4. git checkout bug_2018_2
5. npm install
6. cd app/hybrid-example
7. npx ts-node server.ts
8. npx ts-node client.ts

Result -> Error (see stack trace above)

Environment

Nest version: @nestjs/core@4.5.10

For Tooling issues:
- Node version: XX  v8.9.0
- Platform:  Windows 8

[cojack]

Did you read the docs? https://docs.nestjs.com/microservices/basics

[unlight]

Did you read the docs? docs.nestjs.com/microservices/basics

Yes. And what?

I took code example from nest/examples/03-microservices/src/main.ts Apparantly, it's not correct at the moment or was broken.

Changed code to docs example and it works as expected.

Changed title of the issue.

[cojack]

@unlight I don't know what did you do, but for me it works. Checkout my recorded terminal session: https://asciinema.org/a/ndwZfLnX1leAHj1qKn94E0G0Y

[kamilmysliwiec]

Hi @unlight, You created a hybrid application (https://docs.nestjs.com/faq/hybrid-application). Use createMicroservice() instead (https://docs.nestjs.com/microservices/basics)

[gustavosinbandera1]

for me work fine

[lock[bot]]

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