module Redis::Cluster::SlotLoader

def fetch_slot_info(node)
  hash_with_default_arr = Hash.new { |h, k| h[k] = [] }
  node.call(%i[cluster slots])
    .flat_map { |arr| parse_slot_info(arr, default_ip: node.host) }
    .each_with_object(hash_with_default_arr) { |arr, h| h[arr[0]] << arr[1] }
rescue CannotConnectError, ConnectionError, CommandError
  {} # can retry on another node
end