{15, "SIGTERM", "terminated"},
	{16, "SIGSTKFLT", "stack fault"},
	{17, "SIGCHLD", "child exited"},
	{18, "SIGCONT", "continued"},
	{19, "SIGSTOP", "stopped (signal)"},
	{20, "SIGTSTP", "stopped"},
	{21, "SIGTTIN", "stopped (tty input)"},
	{22, "SIGTTOU", "stopped (tty output)"},
	{23, "SIGURG", "urgent I/O condition"},
	{24, "SIGXCPU", "CPU time limit exceeded"},
	{25, "SIGXFSZ", "file size limit exceeded"},

    }
  }

  /**
   * Invoke this method to transition the service to the {@link State#FAILED}. The service will
   * <b>not be stopped</b> if it is running. Invoke this method when a service has failed critically
   * or otherwise cannot be started nor stopped.
   */
  protected final void notifyFailed(Throwable cause) {
    checkNotNull(cause);

    monitor.enter();
    try {

	defer gb.monitorLock.Unlock()
	monitors := gb.monitors
	stopped := 0
	for _, monitor := range monitors {
		if monitor.stopCh != nil {
			stopped++
			close(monitor.stopCh)
		}
	}

	// reset monitors so that the graph builder can be safely re-run/synced.
	gb.monitors = nil
	logger.Info("stopped monitors", "stopped", stopped, "total", len(monitors))
}

		}
		return lns, nil
	}
	return nil, errors.New("no dualstack port available")
}

type localServer struct {
	lnmu sync.RWMutex
	Listener
	done chan bool // signal that indicates server stopped
	cl   []Conn    // accepted connection list
}

func (ls *localServer) buildup(handler func(*localServer, Listener)) error {
	go func() {
		handler(ls, ls.Listener)
		close(ls.done)
	}()
	return nil

	{15, "SIGTERM", "terminated"},
	{16, "SIGSTKFLT", "stack fault"},
	{17, "SIGCHLD", "child exited"},
	{18, "SIGCONT", "continued"},
	{19, "SIGSTOP", "stopped (signal)"},
	{20, "SIGTSTP", "stopped"},
	{21, "SIGTTIN", "stopped (tty input)"},
	{22, "SIGTTOU", "stopped (tty output)"},
	{23, "SIGURG", "urgent I/O condition"},
	{24, "SIGXCPU", "CPU time limit exceeded"},
	{25, "SIGXFSZ", "file size limit exceeded"},

	{15, "SIGTERM", "terminated"},
	{16, "SIGSTKFLT", "stack fault"},
	{17, "SIGCHLD", "child exited"},
	{18, "SIGCONT", "continued"},
	{19, "SIGSTOP", "stopped (signal)"},
	{20, "SIGTSTP", "stopped"},
	{21, "SIGTTIN", "stopped (tty input)"},
	{22, "SIGTTOU", "stopped (tty output)"},
	{23, "SIGURG", "urgent I/O condition"},
	{24, "SIGXCPU", "CPU time limit exceeded"},
	{25, "SIGXFSZ", "file size limit exceeded"},

	{14, "SIGALRM", "alarm clock"},
	{15, "SIGTERM", "terminated"},
	{16, "SIGURG", "urgent I/O condition"},
	{17, "SIGSTOP", "stopped (signal)"},
	{18, "SIGTSTP", "stopped"},
	{19, "SIGCONT", "continued"},
	{20, "SIGCHLD", "child exited"},
	{21, "SIGTTIN", "stopped (tty input)"},
	{22, "SIGTTOU", "stopped (tty output)"},
	{23, "SIGIO", "I/O possible"},
	{24, "SIGXCPU", "CPU time limit exceeded"},

	{15, "SIGTERM", "terminated"},
	{16, "SIGSTKFLT", "stack fault"},
	{17, "SIGCHLD", "child exited"},
	{18, "SIGCONT", "continued"},
	{19, "SIGSTOP", "stopped (signal)"},
	{20, "SIGTSTP", "stopped"},
	{21, "SIGTTIN", "stopped (tty input)"},
	{22, "SIGTTOU", "stopped (tty output)"},
	{23, "SIGURG", "urgent I/O condition"},
	{24, "SIGXCPU", "CPU time limit exceeded"},
	{25, "SIGXFSZ", "file size limit exceeded"},

    }
  }

  /**
   * Invoke this method to transition the service to the {@link State#FAILED}. The service will
   * <b>not be stopped</b> if it is running. Invoke this method when a service has failed critically
   * or otherwise cannot be started nor stopped.
   */
  protected final void notifyFailed(Throwable cause) {
    checkNotNull(cause);

    monitor.enter();
    try {

	12:  "bad system call",
	13:  "broken pipe",
	14:  "alarm clock",
	15:  "terminated",
	16:  "urgent I/O condition",
	17:  "stopped (signal)",
	18:  "stopped",
	19:  "continued",
	20:  "child exited",
	21:  "stopped (tty input)",
	22:  "stopped (tty output)",
	23:  "I/O possible/complete",
	24:  "cputime limit exceeded",
	25:  "filesize limit exceeded",
	27:  "input device data",