2016-07-13T22:19:43.667+0800 I ACCESS   [conn4]  authenticate db: finddemo { aut
henticate: 1, nonce: "xxx", user: "user1", key: "xxx" }
2016-07-13T22:19:43.668+0800 I ACCESS   [conn4] Failed to authenticate user1@fin
ddemo with mechanism MONGODB-CR: AuthenticationFailed: UserNotFound: Could not f
ind user user1@finddemo
2016-07-13T22:20:12.555+0800 I ACCESS   [conn2] SCRAM-SHA-1 authentication faile
d for user1 on finddemo from client 127.0.0.1 ; UserNotFound: Could not find use
r user1@finddemo
2016-07-13T22:20:17.127+0800 I NETWORK  [initandlisten] connection accepted from127.0.0.1:56103 #5 (4 connections now open)
2016-07-13T22:20:17.127+0800 I ACCESS   [conn5]  authenticate db: admin { authen
ticate: 1, nonce: "xxx", user: "root", key: "xxx" }
2016-07-13T22:20:17.146+0800 I NETWORK  [initandlisten] connection accepted from127.0.0.1:56104 #6 (5 connections now open)
2016-07-13T22:20:17.146+0800 I ACCESS   [conn6]  authenticate db: admin { authen
ticate: 1, nonce: "xxx", user: "root", key: "xxx" }

SCRAM-SHA-1 authentication failed for user1 on finddemo

> use admin
switched to db admin
>  var schema = db.system.version.findOne({"_id" : "authSchema"})
> schema.currentVersion = 3
3
> db.system.version.save(schema)
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })  

{ "_id" : "admin.root", "user" : "root", "db" : "admin", "credentials" : { "MONGODB-CR" : "97a156792bd180dc82cec9a56d838991" }, "roles" : [ { "role" : "__system", "db" : "admin" } ] }
{ "_id" : "finddemo.finddemo", "user" : "finddemo", "db" : "finddemo", "credentials" : { "MONGODB-CR" : "4b8dce39de95d553473c1998f43aa165" }, "roles" : [ { "role" : "dbOwner", "db" : "finddemo" } ] }