src/main/java/com/alipay/remoting/ScheduledDisconnectStrategy.java
@Override
    public Map<String, List<Connection>> filter(List<Connection> connections) {
        List<Connection> serviceOnConnections = new ArrayList<Connection>();
        List<Connection> serviceOffConnections = new ArrayList<Connection>();
        Map<String, List<Connection>> filteredConnections = new ConcurrentHashMap<String, List<Connection>>();

        for (Connection connection : connections) {
            String serviceStatus = (String) connection.getAttribute(Configs.CONN_SERVICE_STATUS);
            if (serviceStatus != null) {
                if (connection.isInvokeFutureMapFinish()
                    && !freshSelectConnections.containsValue(connection)) {
                    serviceOffConnections.add(connection);
                }
            } else {
                serviceOnConnections.add(connection);
            }
        }

        filteredConnections.put(Configs.CONN_SERVICE_STATUS_ON, serviceOnConnections);
        filteredConnections.put(Configs.CONN_SERVICE_STATUS_OFF, serviceOffConnections);
        return filteredConnections;
    }
@Override
    public Map<String, List<Connection>> filter(List<Connection> connections) {
        List<Connection> serviceOnConnections = new ArrayList<Connection>();
        List<Connection> serviceOffConnections = new ArrayList<Connection>();
        Map<String, List<Connection>> filteredConnections = new ConcurrentHashMap<String, List<Connection>>();

        for (Connection connection : connections) {
            String serviceStatus = (String) connection.getAttribute(Configs.CONN_SERVICE_STATUS);
            if (serviceStatus != null) {
                if (connection.isInvokeFutureMapFinish()
                    && !freshSelectConnections.containsValue(connection)) {
                    serviceOffConnections.add(connection);
                }
            } else {
                serviceOnConnections.add(connection);
            }
        }

        filteredConnections.put(Configs.CONN_SERVICE_STATUS_ON, serviceOnConnections);
        filteredConnections.put(Configs.CONN_SERVICE_STATUS_OFF, serviceOffConnections);
        return filteredConnections;
    }
Filter connections to monitor

@param connections