long beforeSelect = System.currentTimeMillis();
                int selected = SelectorUtil.select(selector);
                if (selected == 0 && !wakenUp.get()) {
                    long timeBlocked = System.currentTimeMillis() - beforeSelect;

                    if (timeBlocked < minSelectTimeout) {
                        boolean notConnected = false;
                        for (SelectionKey key: selector.keys()) {
                            AbstractNioChannel<?> ch = (AbstractNioChannel<?>) key.attachment();
                            if (!ch.isConnected()) {
                                notConnected = true;
                                break;
                            }
                        }
                        if (notConnected) {
                            selectReturnsImmediately = 0;
                        } else {
                            // returned before the minSelectTimeout elapsed with nothing select.
                            // this may be the cause of the jdk epoll(..) bug, so increment the counter
                            // which we use later to see if its really the jdk bug.
                            selectReturnsImmediately ++;

                            System.out.println("blocked=" + timeBlocked + " min=" + minSelectTimeout
                                    + "times=" + selectReturnsImmediately);
                        }

                    } else {
                        selectReturnsImmediately = 0;
                    }