2016-06-24T14:20:33.236+0000 D NETWORK  [conn208804] dbclient_rs say using secondary or tagged node selection in <.......shard-name....>, read pref is { mode: "nearest" } (primary : <.......server-name....>, lastTagged : [not cached])
2016-06-24T14:20:33.236+0000 D NETWORK  [conn208804] dbclient_rs selecting node <.......server-name....>
2016-06-24T14:20:33.236+0000 D NETWORK  [conn208804] dbclient_rs say using secondary or tagged node selection in <.......shard-name....>, read pref is { mode: "nearest" } (primary : <.......server-name....>, lastTagged : [not cached])
2016-06-24T14:20:33.236+0000 D NETWORK  [conn208804] dbclient_rs selecting node <.......server-name....>
2016-06-24T14:20:33.236+0000 D NETWORK  [conn208804] dbclient_rs say using secondary or tagged node selection in <.......shard-name....>, read pref is { mode: "nearest" } (primary : <.......server-name....>, lastTagged : [not cached])
2016-06-24T14:20:33.236+0000 D NETWORK  [conn208804] dbclient_rs selecting node <.......server-name....>
2016-06-24T14:20:33.236+0000 D NETWORK  [conn208804] dbclient_rs say using secondary or tagged node selection in <.......shard-name....>, read pref is { mode: "nearest" } (primary : <.......server-name....>, lastTagged : [not cached])
2016-06-24T14:20:33.236+0000 D NETWORK  [conn208804] dbclient_rs selecting primary node <.......server-name....>
2016-06-24T14:20:33.487+0000 D NETWORK  [conn208804] dbclient_rs query using secondary or tagged node selection in <.......shard-name....>, read pref is { mode: "nearest" } (primary : <.......server-name....>, lastTagged : <.......server-name....>)
2016-06-24T14:20:33.487+0000 D NETWORK  [conn208804] dbclient_rs selecting compatible last used node <.......server-name....>