function repro() {

    uri="mongodb://localhost:27017/test?replicaSet=rs"

    # tail the oplog on the secondary
    mongo $uri --eval '
        var ol = db.getSiblingDB("local").oplog.rs
        var c = ol.find({}).readPref("secondaryPreferred").tailable({isAwaitData: true})
        var i = 0
        while (true) {
            c.forEach(function (o) {
                print(i++, o.wall)
            })
        }
    ' &

    sleep 5

    # generate some traffic
    mongo $uri --eval '
        while (true)
            db.c.insert({})
    '
}

2018-01-09T15:56:56.703-0500 E QUERY    [thread1] Error: getMore command failed: {
	"ok" : 0,
	"errmsg" : "PlanExecutor killed: CappedPositionLost: CollectionScan died due to failure to restore tailable cursor position. Last seen record id: RecordId(6509157867780571265)",
	"code" : 175,
	"codeName" : "QueryPlanKilled",
	"operationTime" : Timestamp(1515531416, 129),
	"$clusterTime" : {
		"clusterTime" : Timestamp(1515531416, 131),
		"signature" : {
			"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
			"keyId" : NumberLong(0)
		}
	}
} :