Connection errors (UNIX domain)

The most common errors that can be returned when a connection fails are:

ECONNREFUSED

The host refused service for some reason. This error usually occurs when the requested name exists, but is not in a state that allows it to accept connections.

ENOENT

No such file or directory. This error is returned if a connection cannot be established because the requested name does not exist.

If a connection fails at any time, the socket cannot be re-used; it must be closed and a new socket created.