When cluster size is 2 and auto_adjust_quorum_for_small_cluster_ is on, the quorum size will be automatically adjusted to 1 when the other member is not responding. In such a case, we want to ask callback function whether we can adjust the quorum size or not.
auto_adjust_quorum_for_small_cluster_is on, the quorum size will be automatically adjusted to 1 when the other member is not responding. In such a case, we want to ask callback function whether we can adjust the quorum size or not.