Rocketchat error during migration after upgrade

I recently upgraded from 0.62 to 0.65 in CentOS server. While running node main.js, I get the following output:

Setting default file store to FileSystem
connect deprecated multipart: use parser (multiparty, busboy, formidable) npm module instead npm/node_modules/connect/lib/middleware/bodyParser.js:56:20
connect deprecated limit: Restrict request size at location of read npm/node_modules/connect/lib/middleware/multipart.js:86:15
{"line":"160","file":"rocketchat_migrations.js","message":"Migrations: Not migrating, already at version 121","time":{"$date":1528731630704},"level":"info"}
Updating process.env.MAIL_URL
Using GridFS for custom sounds storage
Using GridFS for custom emoji storage
Push: configuring...
Push.Configure { sendTimeout: 60000,
  apn: undefined,
   { apiKey: 'XXXX',
     projectNumber: 'YYYY' },
  production: true,
  sendInterval: 1000,
  sendBatchSize: 10 }
GCM configured
Push: Send worker started, using interval: 1000
Exception in callback of async function: Error: listen EADDRINUSE
    at Object._errnoException (util.js:1024:11)
    at _exceptionWithHostPort (util.js:1046:20)
    at Server.setupListenHandle [as _listen2] (net.js:1351:14)
    at listenInCluster (net.js:1392:12)
    at doListen (net.js:1501:7)
    at _combinedTickCallback (internal/process/next_tick.js:141:11)
    at process._tickDomainCallback (internal/process/next_tick.js:218:9)

➔ System ➔ startup
➔ +-------------------------------------------------------------+
➔ |                        SERVER RUNNING                       |
➔ +-------------------------------------------------------------+
➔ |                                                             |
➔ |  Rocket.Chat Version: 0.65.1                                |
➔ |       NodeJS Version: 8.9.3 - x64                           |
➔ |             Platform: linux                                 |
➔ |         Process Port: 3000                                  |
➔ |             Site URL: http://ZZZZ:3000  |
➔ |     ReplicaSet OpLog: Disabled                              |
➔ |          Commit Hash: 8349c36de0                            |
➔ |        Commit Branch: HEAD                                  |
➔ |                                                             |
➔ +-------------------------------------------------------------+

Although the server is running, I am not able to access it from the browser. What is the possible error?

I’d recommend stopping and then doing ps aux | grep node and see if it’s running anywhere else. That error typically means either an old instance of Rocket.Chat didn’t get shutdown fully… Or something else on the system is listening on port 3000.

In rare cases I’ve seen where the port just hasn’t been released when doing rapid stop and start of new version