vs initVCs: fail if oplog readers already exists
vs initVCs: fail if oplog readers already exists

Netsend/persdb,Netsend/persdb,Netsend/mastersync,Netsend/mastersync,Netsend/PerspectiveDB,Netsend/PerspectiveDB,Netsend/PerspectiveDB,Netsend/persdb,Netsend/mastersync