search(:node, "roles:hadoop-edgenode") do |nedge|
  # search(:node, "roles:hadoop-edgenode#{env_filter}") do |nedge|
  if !nedge[:fqdn].nil? && !nedge[:fqdn].empty?
    Chef::Log.info("HADOOP : EDGE [#{nedge[:fqdn]}") if debug
    edge_nodes << nedge[:fqdn]