var backlogSize: Int = 511

Represents TCP server socket backlog size. When a client attempts to connect, the request is added to the so called backlog until it will be accepted. Once accept() is invoked, a client socket is removed from the backlog. If the backlog is too small, it may overflow and upcoming requests will be rejected by the underlying TCP implementation (usually with RST frame that usually causes "connection reset by peer" error on the opposite side).