Replicaset Connectivity Issue from Docker and 3.6.x

XMLWordPrintableJSON

    • Type: Bug
    • Resolution: Fixed
    • Priority: Major - P3
    • 3.6.4
    • Affects Version/s: 3.6.3
    • Component/s: None
    • None
    • None
    • None
    • None
    • None
    • None
    • None
    • None

      I'm not sure if this would be a regression from 3.6.x or a bug that was fixed in 3.6.x however given the following MongoDB cluster (single node replica set running in docker) the test will succeed in 3.5 and fail in 3.6.

      docker-compose.yml

      version: "3"
services: 
  mongodb: 
   image: mongo:4.4.1-bionic
   environment: 
     MONGO_REPLICA_SET_NAME: rs0
   expose: 
     - 27017
   ports: 
     - "27017:27017"
   healthcheck: 
     test: test $$(echo "rs.initiate().ok || rs.slaveOk().ok || rs.status().ok" | mongo --quiet) -eq 1
     interval: 10s
     start_period: 30s
   entrypoint: [ "/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0" ]

      index.js

      const { MongoClient } = require('mongodb');

const url = "mongodb://127.0.0.1:27017/test?replSet=rs0'"
const options = {
  useNewUrlParser: true,
  useUnifiedTopology: true
};

console.log('connecting to', url);

var client = new MongoClient(url, options);

client.on('serverDescriptionChanged', function(event) {
  console.log('received serverDescriptionChanged');
  console.log(JSON.stringify(event, null, 2));
});

client.on('serverHeartbeatStarted', function(event) {
  console.log('received serverHeartbeatStarted');
  console.log(JSON.stringify(event, null, 2));
});

client.on('serverHeartbeatSucceeded', function(event) {
  console.log('received serverHeartbeatSucceeded');
  console.log(JSON.stringify(event, null, 2));
});

client.on('serverHeartbeatFailed', function(event) {
  console.log('received serverHeartbeatFailed');
  console.log(JSON.stringify(event, null, 2));
});

client.on('serverOpening', function(event) {
  console.log('received serverOpening');
  console.log(JSON.stringify(event, null, 2));
});

client.on('serverClosed', function(event) {
  console.log('received serverClosed');
  console.log(JSON.stringify(event, null, 2));
});

client.on('topologyOpening', function(event) {
  console.log('received topologyOpening');
  console.log(JSON.stringify(event, null, 2));
});

client.on('topologyClosed', function(event) {
  console.log('received topologyClosed');
  console.log(JSON.stringify(event, null, 2));
});

client.on('topologyDescriptionChanged', function(event) {
  console.log('received topologyDescriptionChanged');
  console.log(JSON.stringify(event, null, 2));
});

client.connect()
  .then(() => {
    console.log('ok')
  })  .catch((err) => console.error('error', err));

      To run the test:

      docker-compose up -d
npm install mongodb@3.5.10 --save && node index.js
npm install mongodb@3.6.3 --save && node index.js

      The test above shows the serverDescriptionChanged events differ, and as a result the serverOpening event is targeting an IP address (in 3.5.x) as opposed to a hostname (in 3.6.x)

      // 3.5 Topology Events

received serverOpening
{
  "topologyId": 0,
  "address": "127.0.0.1:27017"
}
received serverHeartbeatStarted
{
  "connectionId": "127.0.0.1:27017"
}
received serverHeartbeatSucceeded
{
  "connectionId": "127.0.0.1:27017",
  "duration": 26,
  "reply": {
    "topologyVersion": {
      "processId": "5faaebc4119ee19f2d5dccf5",
      "counter": 6
    },
    "hosts": [
      "mongodb:27017"
    ],
    "setName": "rs0",
    "setVersion": 1,
    "ismaster": true,
    "secondary": false,
    "primary": "mongodb:27017",
    "me": "mongodb:27017",
    "electionId": "7fffffff0000000000000002",
    "lastWrite": {
      "opTime": {
        "ts": "6893584559196078081",
        "t": 2
      },
      "lastWriteDate": "2020-11-10T19:48:50.000Z",
      "majorityOpTime": {
        "ts": "6893584559196078081",
        "t": 2
      },
      "majorityWriteDate": "2020-11-10T19:48:50.000Z"
    },
    "maxBsonObjectSize": 16777216,
    "maxMessageSizeBytes": 48000000,
    "maxWriteBatchSize": 100000,
    "localTime": "2020-11-10T19:48:53.620Z",
    "logicalSessionTimeoutMinutes": 30,
    "connectionId": 81,
    "minWireVersion": 0,
    "maxWireVersion": 9,
    "readOnly": false,
    "ok": 1,
    "$clusterTime": {
      "clusterTime": "6893584559196078081",
      "signature": {
        "hash": {
          "type": "Buffer",
          "data": [
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0
          ]
        },
        "keyId": 0
      }
    },
    "operationTime": "6893584559196078081"
  }
}
received serverDescriptionChanged
{
  "topologyId": 0,
  "address": "127.0.0.1:27017",
  "previousDescription": {
    "address": "127.0.0.1:27017",
    "roundTripTime": -1,
    "lastUpdateTime": 1322597506,
    "lastWriteDate": null,
    "opTime": null,
    "type": "Unknown",
    "minWireVersion": 0,
    "maxWireVersion": 0,
    "hosts": [],
    "passives": [],
    "arbiters": [],
    "tags": []
  },
  "newDescription": {
    "address": "127.0.0.1:27017",
    "roundTripTime": 26,
    "lastUpdateTime": 1322597542,
    "lastWriteDate": "2020-11-10T19:48:50.000Z",
    "opTime": {
      "ts": "6893584559196078081",
      "t": 2
    },
    "type": "RSPrimary",
    "minWireVersion": 0,
    "maxWireVersion": 9,
    "maxBsonObjectSize": 16777216,
    "maxMessageSizeBytes": 48000000,
    "maxWriteBatchSize": 100000,
    "me": "mongodb:27017",
    "hosts": [
      "mongodb:27017"
    ],
    "passives": [],
    "arbiters": [],
    "tags": [],
    "setName": "rs0",
    "setVersion": 1,
    "electionId": "7fffffff0000000000000002",
    "primary": "mongodb:27017",
    "logicalSessionTimeoutMinutes": 30,
    "$clusterTime": {
      "clusterTime": "6893584559196078081",
      "signature": {
        "hash": {
          "type": "Buffer",
          "data": [
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0
          ]
        },
        "keyId": 0
      }
    }
  }
}

      // 3.6 Topology Events
received serverOpening
{
  "topologyId": 0,
  "address": "127.0.0.1:27017"
}
received serverHeartbeatStarted
{
  "connectionId": "127.0.0.1:27017"
}
received serverHeartbeatSucceeded
{
  "connectionId": "127.0.0.1:27017",
  "duration": 30,
  "reply": {
    "topologyVersion": {
      "processId": "5faaebc4119ee19f2d5dccf5",
      "counter": 6
    },
    "hosts": [
      "mongodb:27017"
    ],
    "setName": "rs0",
    "setVersion": 1,
    "ismaster": true,
    "secondary": false,
    "primary": "mongodb:27017",
    "me": "mongodb:27017",
    "electionId": "7fffffff0000000000000002",
    "lastWrite": {
      "opTime": {
        "ts": "6893584730994769921",
        "t": 2
      },
      "lastWriteDate": "2020-11-10T19:49:30.000Z",
      "majorityOpTime": {
        "ts": "6893584730994769921",
        "t": 2
      },
      "majorityWriteDate": "2020-11-10T19:49:30.000Z"
    },
    "maxBsonObjectSize": 16777216,
    "maxMessageSizeBytes": 48000000,
    "maxWriteBatchSize": 100000,
    "localTime": "2020-11-10T19:49:39.876Z",
    "logicalSessionTimeoutMinutes": 30,
    "connectionId": 86,
    "minWireVersion": 0,
    "maxWireVersion": 9,
    "readOnly": false,
    "ok": 1,
    "$clusterTime": {
      "clusterTime": "6893584730994769921",
      "signature": {
        "hash": {
          "type": "Buffer",
          "data": [
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0
          ]
        },
        "keyId": 0
      }
    },
    "operationTime": "6893584730994769921"
  }
}
received serverDescriptionChanged
{
  "topologyId": 0,
  "address": "127.0.0.1:27017",
  "previousDescription": {
    "address": "127.0.0.1:27017",
    "roundTripTime": -1,
    "lastUpdateTime": 1322643760,
    "lastWriteDate": null,
    "opTime": null,
    "type": "Unknown",
    "minWireVersion": 0,
    "maxWireVersion": 0,
    "hosts": [],
    "passives": [],
    "arbiters": [],
    "tags": []
  }
}

            Assignee:
            Eric Adum (Inactive)
            Reporter:
            Alex Bevilacqua
            None
            Votes:
            6 Vote for this issue
            Watchers:
            12 Start watching this issue

              Created:
              Updated:
              Resolved: