Question

我有2个应用服务器，它们连接到副本集（主要，辅助和仲裁者）。

我面临的问题是

 [ 'MongoError: no primary found in replicaset',
  '    at ../server/node_modules/mongodb-core/lib/topologies/replset.js:524:28',
  '    at null.<anonymous> (../server/node_modules/mongodb-core/lib/topologies/replset.js:303:24)',
  '    at g (events.js:260:16)',
  '    at emitOne (events.js:77:13)',
  '    at emit (events.js:169:7)',
  '    at null.<anonymous> (../server/node_modules/mongodb-core/lib/topologies/server.js:326:21)',
  '    at emitOne (events.js:77:13)',
  '    at emit (events.js:169:7)',
  '    at null.<anonymous> (../server/node_modules/mongodb-core/lib/connection/pool.js:270:12)',
  '    at g (events.js:260:16)',
  '    at emitTwo (events.js:87:13)',
  '    at emit (events.js:172:7)',
  '    at Socket.<anonymous> (../server/node_modules/mongodb-core/lib/connection/connection.js:175:49)',
  '    at Socket.g (events.js:260:16)',
  '    at emitOne (events.js:77:13)',
  '    at Socket.emit (events.js:169:7)',
  '    at connectErrorNT (net.js:996:8)',
  '    at nextTickCallbackWith2Args (node.js:442:9)',
  '    at process._tickCallback (node.js:356:17)' ]

应用程序上的ReplicaSet配置：

 "mongodb" : { 
      "replicaset": {
       "db"       : "test",
       "user"     : "admin",
       "password" : "*********",
       "name":"rs1",  
       "replicas": [{"host":"App1Box.dmz.mytest.com.au","port":27017}, {"host":"App2Box.dmz.mytest.com.au","port":27018}]  
      }

rs.status（）输出

rs1:PRIMARY> rs.status()
{
        "set" : "rs1",
        "date" : ISODate("2018-05-17T03:50:01Z"),
        "myState" : 1,
        "members" : [
                {
                        "_id" : 2,
                        "name" : "App3Box:27018",
                        "health" : 1,
                        "state" : 7,
                        "stateStr" : "ARBITER",
                        "uptime" : 7180,
                        "lastHeartbeat" : ISODate("2018-05-17T03:50:00Z"),
                        "lastHeartbeatRecv" : ISODate("2018-05-17T03:50:00Z"),
                        "pingMs" : 0
                },
                {
                        "_id" : 3,
                        "name" : "App2Box:27018",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 7528,
                        "optime" : Timestamp(1526521846, 1),
                        "optimeDate" : ISODate("2018-05-17T01:50:46Z"),
                        "electionTime" : Timestamp(1526521798, 1),
                        "electionDate" : ISODate("2018-05-17T01:49:58Z"),
                        "self" : true
                },
                {
                        "_id" : 4,
                        "name" : "App1Box:27017",
                        "health" : 1,
                        "state" : 2,
                        "stateStr" : "SECONDARY",
                        "uptime" : 7139,
                        "optime" : Timestamp(1526521846, 1),
                        "optimeDate" : ISODate("2018-05-17T01:50:46Z"),
                        "lastHeartbeat" : ISODate("2018-05-17T03:50:01Z"),
                        "lastHeartbeatRecv" : ISODate("2018-05-17T03:50:01Z"),
                        "pingMs" : 0,
                        "syncingTo" : "App2Box:27018"
                }
        ],
        "ok" : 1
}

但是，我只是从连接到MongoDB的应用服务器之一看到这个说App1Box。我在App2Box上没有看到这个问题。

我尝试从replicaSet中删除成员并重新添加，问题仍然存在。

Mongo版本：2.6.8 节点版本：4.4.3 npm版本：3.8.9

我可以在主要和次要上执行rs.status（）时从mongo控制台看到replicaSet中的所有成员。

感谢您的帮助。

Answer 1

在向replicaSet添加成员时，发现问题是没有使用完全限定的DNS名称。感谢@Neil Lunn。

Answer 2

在与replicaSet的连接链接后添加如下代码

'mongodb://localhost:27017/streamfig?replicaSet=rs', { useNewUrlParser: true, useUnifiedTopology: true, connectWithNoPrimary: true }

它将解决所有错误。

Answer 3

1）请检查您的连接字符串是否包含以下链接的所有数据库服务器名称 https://docs.mongodb.com/manual/reference/connection-string/#standard-connection-string-format

2）做一次故障转移要做到这一点，请登录主节点并执行以下命令

Dropbox

MongoError：在replicaset中找不到主要内容

3 个答案: