private void handleCloseConnection(Connection conn) {
        if (conn.isClosed()) {
            return;
        }
        conn.fini();
        if (conn.hasSocket()) {
            parent.closeLater(conn);
        }
    }
A single reactor/scheduler thread inside a potentially
multi-threaded {@link Transport}.
jrt/src/com/yahoo/jrt/TransportThread.java