uncaught exception: "socket error connecting to localhost:6344"

Get the following error running the "hello world" example ([source](https://github.com/racket/distributed-places/blob/master/distributed-places-lib/racket/place/distributed/examples/hello-world.rkt)).

```
uncaught exception: "socket error connecting to localhost:6344"
```

## Environment
```
Mac OSX
Racket v8.0 [cs]
```