復制集當前的primary是23001端口實例，但是通過rs.status()看到的23002端口實例syncingTo指向另一個從節點23005實例。

"members" : [

{

"_id" : 0,

"name" : "10.10.99.102:23001",

"health" : 1,

"state" : 1,

"stateStr" : "PRIMARY",

"uptime" : 6976,

"optime" : {

"ts" : Timestamp(1542186401, 1),

"t" : NumberLong(6)

},

"optimeDurable" : {

"ts" : Timestamp(1542186401, 1),

"t" : NumberLong(6)

},

"optimeDate" : ISODate("2018-11-14T09:06:41Z"),

"optimeDurableDate" : ISODate("2018-11-14T09:06:41Z"),

"lastHeartbeat" : ISODate("2018-11-14T09:06:46.592Z"),

"lastHeartbeatRecv" : ISODate("2018-11-14T09:06:46.273Z"),

"pingMs" : NumberLong(0),

"electionTime" : Timestamp(1542179439, 1),

"electionDate" : ISODate("2018-11-14T07:10:39Z"),

"configVersion" : 7

},

{

"_id" : 1,

"name" : "10.10.99.102:23002",

"health" : 1,

"state" : 2,

"stateStr" : "SECONDARY",

"uptime" : 91513,

"optime" : {

"ts" : Timestamp(1542182801, 1),

"t" : NumberLong(6)

},

"optimeDate" : ISODate("2018-11-14T08:06:41Z"),

"syncingTo" : "10.10.99.102:23005",

"configVersion" : 7,

"self" : true

},