2016-06-24T14:14:36.523+0000 D NETWORK  [conn208646] dbclient_rs say using secondary or tagged node selection in <.......shard-name....>, read pref is { mode: "secondaryPreferred" } (primary : <.......server-name....>, lastTagged : [not cached])
2016-06-24T14:14:36.523+0000 D NETWORK  [conn208646] dbclient_rs selecting node <.......server-name....>
2016-06-24T14:14:36.529+0000 D NETWORK  [conn208646] dbclient_rs say using secondary or tagged node selection in <.......shard-name....>, read pref is { mode: "secondaryPreferred" } (primary : <.......server-name....>, lastTagged : [not cached])
2016-06-24T14:14:36.529+0000 D NETWORK  [conn208646] dbclient_rs selecting node <.......server-name....>
2016-06-24T14:14:36.530+0000 D NETWORK  [conn208646] dbclient_rs say using secondary or tagged node selection in <.......shard-name....>, read pref is { mode: "secondaryPreferred" } (primary : <.......server-name....>, lastTagged : [not cached])
2016-06-24T14:14:36.530+0000 D NETWORK  [conn208646] dbclient_rs selecting node <.......server-name....>
2016-06-24T14:14:36.530+0000 D NETWORK  [conn208646] dbclient_rs say using secondary or tagged node selection in <.......shard-name....>, read pref is { mode: "secondaryPreferred" } (primary : <.......server-name....>, lastTagged : [not cached])
2016-06-24T14:14:36.530+0000 D NETWORK  [conn208646] dbclient_rs selecting node <.......server-name....>
2016-06-24T14:14:36.531+0000 D NETWORK  [conn208646] dbclient_rs query using secondary or tagged node selection in <.......shard-name....>, read pref is { mode: "secondaryPreferred" } (primary : <.......server-name....>, lastTagged : <.......server-name....>)
2016-06-24T14:14:36.531+0000 D NETWORK  [conn208646] dbclient_rs selecting compatible last used node <.......server-name....>