In the ARM scenario, mongodb version 3.2.10 (using the mmapv1 storageEngine), one node of replica set is SECONDARY(the mongod process is normal, load of the deployment machine is normal)，this SECONDARY node can not sync data from Primary node.

rs.status()
{
"set" : "fsp",
"date" : ISODate("2019-04-15T03:49:17.717Z"),
"myState" : 1,
"term" : NumberLong(13),
"heartbeatIntervalMillis" : NumberLong(2000),
"members" : [
{
"_id" : 0,
"name" : "172.28.9.140:27017",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 1763536,
"optime" :

{ "ts" : Timestamp(1555300146, 10), "t" : NumberLong(13) }

,
"optimeDate" : ISODate("2019-04-15T03:49:06Z"),
"electionTime" : Timestamp(1553536954, 1),
"electionDate" : ISODate("2019-03-25T18:02:34Z"),
"configVersion" : 1,
"self" : true
},
{
"_id" : 1,
"name" : "172.28.9.141:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 1737243,
"optime" :

{ "ts" : Timestamp(1554819946, 50), "t" : NumberLong(13) }

,
"optimeDate" : ISODate("2019-04-09T14:25:46Z"),
"lastHeartbeat" : ISODate("2019-04-15T03:49:15.758Z"),
"lastHeartbeatRecv" : ISODate("2019-04-15T03:49:16.669Z"),
"pingMs" : NumberLong(0),
"syncingTo" : "172.28.9.140:27017",
"configVersion" : 1
},
{
"_id" : 2,
"name" : "172.28.9.142:27017",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 1539409,
"optime" :

{ "ts" : Timestamp(1555300146, 10), "t" : NumberLong(13) }

,
"optimeDate" : ISODate("2019-04-15T03:49:06Z"),
"lastHeartbeat" : ISODate("2019-04-15T03:49:15.908Z"),
"lastHeartbeatRecv" : ISODate("2019-04-15T03:49:15.908Z"),
"pingMs" : NumberLong(0),
"syncingTo" : "172.28.9.140:27017",
"configVersion" : 1
}
],
"ok" : 1
}