CatchSubscriber observers

[theseeker16]

Hello, I'm using the observable Subject for streaming data in nodeJS with the framework NestJS and GRPC. I'm actually catching the errors in my own way. Because I need to dispatch the errors into another microservice and stop the process.

catch (error) {
    let errorObj = new Error(error);
    ColorLog.logger(FG_COLOR.FgMagenta, `PID: ${processUuid}, STATUS: ERROR. ${error}`);
    subject.next({  error: { message: `${errorObj?.message}`, hasError: true } });
    subject.complete();
 }

But I'm really curious about the CatchSubscriber that appears after an async function was executed successfully.

Subject {
  _isScalar: false,
  observers: [
    CatchSubscriber {
      closed: false,
      _parentOrParents: [TakeUntilSubscriber],
      _subscriptions: [Array],
      syncErrorValue: null,
      syncErrorThrown: false,
      syncErrorThrowable: true,
      isStopped: false,
      destination: [TakeUntilSubscriber],
      selector: [Function],
      caught: [Observable]
    }
  ],
  closed: false,
  isStopped: false,
  hasError: false,
  thrownError: null
}

This observer (CatchSubscriber) allows me to do the next inside the catch, but if the async functions failed, that object doesn't appear, so I can't do the next inside the catch.

Subject {
  _isScalar: false,
  observers: [],
  closed: false,
  isStopped: false,
  hasError: false,
  thrownError: null
}

Any help? please