I have an issue that is rather difficult to debug, and was wondering if anyone sees anything wrong with my configuration. I posted an issue in the mongoose github repo (https://github.com/Automattic/mongoose/issues/3634) but have not had any luck there, was hoping someone could help me figure this out.

```
Error no primary server available
```

Nodejs version `4.2.1` and mongoDB version `3.0.7` with mongoose `4.2.8`.

This seems to happen randomly and will open many connection until I finally restart the node process. *The cluster is healthy at all times during this error*. This error happens hundreds of times per hour. There does not seem to be any consistency as to when the error will begin. For example, it occurs when the cluster is operating normally and no changes to the primary have been made.

This is what the db stats look like. As you can see the number of connections will steadily increase. If I kill the node process and start a new one everything is fine.

See attached image.

Config

```
// Connect
mongoose.connect(config.mongo.connectionString, {
server: {
socketOptions:

{ socketTimeoutMS: 5 * 60 * 1000, keepAlive: 1 }

},
replset: {
socketOptions:

{ socketTimeoutMS: 5 * 60 * 1000, keepAlive: 1 }

}
});
```

Connection String

```
mongodb://username:password@mongo-1.cz.0200.mongodbdns.com:27000,mongo-2.cz.0200.mongodbdns.com:27000,mongo-3.cz.0200.mongodbdns.com:27000/dbase
```

Stack trace

```
node_modules/mongoose/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/replset.js:860 pickServer
node_modules/mongoose/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/replset.js:437 command
node_modules/mongoose/node_modules/mongodb/lib/replset.js:392 command
node_modules/mongoose/node_modules/mongodb/lib/db.js:284 executeCommand
node_modules/mongoose/node_modules/mongodb/lib/db.js:307 command
node_modules/mongoose/node_modules/mongodb/lib/collection.js:2340 findAndModify
node_modules/mongoose/node_modules/mongodb/lib/collection.js:2278 findAndModify
node_modules/mongoose/lib/drivers/node-mongodb-native/collection.js:136 (anonymous function) [as findAndModify]
node_modules/mongoose/node_modules/mquery/lib/collection/node.js:79 findAndModify
node_modules/mongoose/lib/query.js:1833 _findAndModify
node_modules/mongoose/lib/query.js:1621 _findOneAndUpdate
node_modules/mongoose/node_modules/kareem/index.js:156 none
node_modules/mongoose/node_modules/kareem/index.js:18 none
node.js:417doNTCallback0
node.js:387_tickDomainCallback
```

While connections are on the rise the status of the cluster is healthy:

```
{
"set" : "mongo2",
"date" : ISODate("2015-12-04T23:39:32.520Z"),
"myState" : 1,
"members" : [

{ "_id" : 6, "name" : "mongo-8.loc.0600.mongodbdns.com:27000", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 444053, "optime" : Timestamp(1449272372, 32), "optimeDate" : ISODate("2015-12-04T23:39:32Z"), "lastHeartbeat" : ISODate("2015-12-04T23:39:32.507Z"), "lastHeartbeatRecv" : ISODate("2015-12-04T23:39:31.442Z"), "pingMs" : 0, "syncingTo" : "mongo-9.loc.0600.mongodbdns.com:27000", "configVersion" : 29 }

,

{ "_id" : 7, "name" : "mongo-9.loc.0600.mongodbdns.com:27000", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 444056, "optime" : Timestamp(1449272372, 39), "optimeDate" : ISODate("2015-12-04T23:39:32Z"), "electionTime" : Timestamp(1449097485, 1), "electionDate" : ISODate("2015-12-02T23:04:45Z"), "configVersion" : 29, "self" : true }

,

{ "_id" : 8, "name" : "mongo-10.loc.0600.mongodbdns.com:27000", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 444053, "optime" : Timestamp(1449272371, 111), "optimeDate" : ISODate("2015-12-04T23:39:31Z"), "lastHeartbeat" : ISODate("2015-12-04T23:39:31.904Z"), "lastHeartbeatRecv" : ISODate("2015-12-04T23:39:30.903Z"), "pingMs" : 2, "syncingTo" : "mongo-8.loc.0600.mongodbdns.com:27000", "configVersion" : 29 }

],
"ok" : 1
}
```

I have been outputting mongoose connection events, and it appears to try and reconnect a lot.

```
​[4:30] Mongoose event: fullsetup
​[4:30] Mongoose event: reconnected
​[4:30] Mongoose event: open
​[4:30] Mongoose event: connected
​[4:30] Mongoose event: reconnected
​[4:30] Mongoose event: reconnected
​[4:30] Mongoose event: reconnected
​[4:30] Mongoose event: reconnected
​[4:30] Mongoose event: reconnected
​[4:30] Mongoose event: reconnected
​[4:30] Mongoose event: fullsetup
​[4:30] Mongoose event: connected
​[4:30] Mongoose event: open
​[4:30]
{
"err":

{ "name": "MongoError", "message": "no primary server available" }

}
```