在从库上执行如下命令：

repset:SECONDARY> rs.slaveOk()

repset:SECONDARY> db.runCommand({"resync":1})

{

"ok" : 0,

"errmsg" : "resync may only be run against the admin database.",

"code" : 13

}

repset:SECONDARY> use admin

switched to db admin

repset:SECONDARY> db.runCommand({"resync":1})

{ "ok" : 1 }

repset:STARTUP2>