* are empty or do not appear to be daemon messages.
     *
     * @param daemon the daemon that could not be communicated with
     */
    void markDaemonAsUnavailable(DaemonConnectDetails daemon);

    /**
     * Connects to a daemon that matches the given constraint.
     *
     * @return A connection to a matching daemon. Returns null if no matching daemon is available.

        } catch (ConnectException e) {
            LOGGER.debug("Cannot connect to daemon {} due to {}. Ignoring.", daemon, e);
        }
        return null;
    }

    @Override
    public void markDaemonAsUnavailable(DaemonConnectDetails daemon) {
        removeDaemonFromRegistry(daemon, "unable to communicate with daemon");
    }

    @Override

            // If the response from the daemon is unintelligible, mark the daemon as unavailable so other
            // clients won't try to communicate with it. We'll attempt to recovery by trying again.
            connector.markDaemonAsUnavailable(connection.getDaemon());
            throw new DaemonInitialConnectException("The first result from the daemon was empty. The daemon process may have died or a non-daemon process is reusing the same port.");
        }