Thanks for letting me know and pointing me in the right direction.

I want to know which plugin is this?

The default popular tags style in my own forum is different.

@baris OK,thx

@baris said in crash Upgrading from 1.10 to 1.11:

console.log(smtpOptions)

I got the log: { service: 126 }

2018-12-29T01:14:40.915Z [4568/1960] - info: Initializing NodeBB v1.11.1 https://sns.widora.io
2018-12-29T01:14:42.909Z [4568/1960] - warn: [upgrade/appendPluginScripts] Unable to read plugin.json for plugin nodebb-plugin-ns-embed. Skipping.
2018-12-29T01:14:42.910Z [4568/1960] - warn: [upgrade/appendPluginScripts] Unable to read plugin.json for plugin nodebb-plugin-poll. Skipping.
2018-12-29T01:14:42.911Z [4568/1960] - warn: [upgrade/appendPluginScripts] Unable to read plugin.json for plugin nodebb-plugin-recent-cards. Skipping.
2018-12-29T01:14:42.911Z [4568/1960] - warn: [upgrade/appendPluginScripts] Unable to read plugin.json for plugin nodebb-plugin-sso-github2. Skipping.
2018-12-29T01:14:43.622Z [4568/1960] - info: [socket.io] Restricting access to origin: https://sns.widora.io
added 20181229
{ service: 126 }
2018-12-29T01:14:43.638Z [4568/1960] - error: uncaughtException: key.split is not a function
TypeError: key.split is not a function
at module.exports (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/well-known/index.js:45:28)
at new SMTPTransport (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/smtp-transport/index.js:43:24)
at Object.module.exports.createTransport (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/nodemailer.js:54:27)
at Object.Emailer.setupFallbackTransport (/home/ubuntu/NodeBB/src/emailer.js:117:40)
at Object.Emailer.registerApp (/home/ubuntu/NodeBB/src/emailer.js:159:10)
at Object.module.exports.listen (/home/ubuntu/NodeBB/src/webserver.js:79:10)
at /home/ubuntu/NodeBB/src/start.js:55:14
at nextTask (/home/ubuntu/NodeBB/node_modules/async/dist/async.js:5324:14)
at next (/home/ubuntu/NodeBB/node_modules/async/dist/async.js:5331:9)
at /home/ubuntu/NodeBB/node_modules/async/dist/async.js:969:16
at /home/ubuntu/NodeBB/src/database/index.js:38:3
at /home/ubuntu/NodeBB/src/database/mongo.js:161:3
at result (/home/ubuntu/NodeBB/node_modules/mongodb/lib/utils.js:414:17)
at executeCallback (/home/ubuntu/NodeBB/node_modules/mongodb/lib/utils.js:406:9)
at err (/home/ubuntu/NodeBB/node_modules/mongodb/lib/operations/mongo_client_ops.js:286:5)
at connectCallback (/home/ubuntu/NodeBB/node_modules/mongodb/lib/operations/mongo_client_ops.js:241:5) {"error":{},"stack":"TypeError: key.split is not a function\n at module.exports (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/well-known/index.js:45:28)\n at new SMTPTransport (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/smtp-transport/index.js:43:24)\n at Object.module.exports.createTransport (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/nodemailer.js:54:27)\n at Object.Emailer.setupFallbackTransport (/home/ubuntu/NodeBB/src/emailer.js:117:40)\n at Object.Emailer.registerApp (/home/ubuntu/NodeBB/src/emailer.js:159:10)\n at Object.module.exports.listen (/home/ubuntu/NodeBB/src/webserver.js:79:10)\n at /home/ubuntu/NodeBB/src/start.js:55:14\

I got the Error Upgrading from 1.10.x to 1.11.x

NodeBB v1.11.1 Copyright (C) 2013-2014 NodeBB Inc.
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it under certain conditions.
For the full license, please visit: http://www.gnu.org/copyleft/gpl.html

Clustering enabled: Spinning up 1 process(es).

2018-12-28T15:08:34.834Z [4568/28933] - info: Initializing NodeBB v1.11.1 http://forum.widora.io
2018-12-28T15:08:37.206Z [4568/28933] - warn: [upgrade/appendPluginScripts] Unable to read plugin.json for plugin `nodebb-plugin-ns-embed`. Skipping.
2018-12-28T15:08:37.207Z [4568/28933] - warn: [upgrade/appendPluginScripts] Unable to read plugin.json for plugin `nodebb-plugin-poll`. Skipping.
2018-12-28T15:08:37.207Z [4568/28933] - warn: [upgrade/appendPluginScripts] Unable to read plugin.json for plugin `nodebb-plugin-recent-cards`. Skipping.
2018-12-28T15:08:37.208Z [4568/28933] - warn: [upgrade/appendPluginScripts] Unable to read plugin.json for plugin `nodebb-plugin-sso-github2`. Skipping.
2018-12-28T15:08:37.901Z [4568/28933] - info: [socket.io] Restricting access to origin: http://forum.widora.io:*
2018-12-28T15:08:37.914Z [4568/28933] - error: uncaughtException: key.split is not a function
TypeError: key.split is not a function
    at module.exports (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/well-known/index.js:45:28)
    at new SMTPTransport (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/smtp-transport/index.js:43:24)
    at Object.module.exports.createTransport (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/nodemailer.js:54:27)
    at Object.Emailer.setupFallbackTransport (/home/ubuntu/NodeBB/src/emailer.js:116:40)
    at Object.Emailer.registerApp (/home/ubuntu/NodeBB/src/emailer.js:158:10)
    at Object.module.exports.listen (/home/ubuntu/NodeBB/src/webserver.js:79:10)
    at /home/ubuntu/NodeBB/src/start.js:55:14
    at nextTask (/home/ubuntu/NodeBB/node_modules/async/dist/async.js:5324:14)
    at next (/home/ubuntu/NodeBB/node_modules/async/dist/async.js:5331:9)
    at /home/ubuntu/NodeBB/node_modules/async/dist/async.js:969:16
    at /home/ubuntu/NodeBB/src/database/index.js:38:3
    at /home/ubuntu/NodeBB/src/database/mongo.js:161:3
    at result (/home/ubuntu/NodeBB/node_modules/mongodb/lib/utils.js:414:17)
    at executeCallback (/home/ubuntu/NodeBB/node_modules/mongodb/lib/utils.js:406:9)
    at err (/home/ubuntu/NodeBB/node_modules/mongodb/lib/operations/mongo_client_ops.js:286:5)
    at connectCallback (/home/ubuntu/NodeBB/node_modules/mongodb/lib/operations/mongo_client_ops.js:241:5) {"error":{},"stack":"TypeError: key.split is not a function\n    at module.exports (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/well-known/index.js:45:28)\n    at new SMTPTransport (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/smtp-transport/index.js:43:24)\n    at Object.module.exports.createTransport (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/nodemailer.js:54:27)\n    at Object.Emailer.setupFallbackTransport (/home/ubuntu/NodeBB/src/emailer.js:116:40)\n    at Object.Emailer.registerApp (/home/ubuntu/NodeBB/src/emailer.js:158:10)\n    at Object.module.exports.listen (/home/ubuntu/NodeBB/src/webserver.js:79:10)\n    at /home/ubuntu/NodeBB/src/start.js:55:14\n    at nextTask (/home/ubuntu/NodeBB/node_modules/async/dist/async.js:5324:14)\n    at next (/home/ubuntu/NodeBB/node_modules/async/dist/async.js:5331:9)\n    at /home/ubuntu/NodeBB/node_modules/async/dist/async.js:969:16\n    at /home/ubuntu/NodeBB/src/database/index.js:38:3\n    at /home/ubuntu/NodeBB/src/database/mongo.js:161:3\n    at result (/home/ubuntu/NodeBB/node_modules/mongodb/lib/utils.js:414:17)\n    at executeCallback (/home/ubuntu/NodeBB/node_modules/mongodb/lib/utils.js:406:9)\n    at err (/home/ubuntu/NodeBB/node_modules/mongodb/lib/operations/mongo_client_ops.js:286:5)\n    at connectCallback (/home/ubuntu/NodeBB/node_modules/mongodb/lib/operations/mongo_client_ops.js:241:5)","exception":true,"date":"Fri Dec 28 2018 23:08:37 GMT+0800 (China Standard Time)","process":{"pid":28933,"uid":500,"gid":500,"cwd":"/home/ubuntu/NodeBB","execPath":"/usr/bin/node","version":"v10.15.0","argv":["/usr/bin/node","/home/ubuntu/NodeBB/app.js"],"memoryUsage":{"rss":148430848,"heapTotal":111874048,"heapUsed":81634560,"external":37782091}},"os":{"loadavg":[0.4169921875,0.3642578125,0.27783203125],"uptime":3825007},"trace":[{"column":28,"file":"/home/ubuntu/NodeBB/node_modules/nodemailer/lib/well-known/index.js","function":"module.exports","line":45,"method":"exports","native":false},{"column":24,"file":"/home/ubuntu/NodeBB/node_modules/nodemailer/lib/smtp-transport/index.js","function":"new SMTPTransport","line":43,"method":null,"native":false},{"column":27,"file":"/home/ubuntu/NodeBB/node_modules/nodemailer/lib/nodemailer.js","function":"Object.module.exports.createTransport","line":54,"method":"createTransport","native":false},{"column":40,"file":"/home/ubuntu/NodeBB/src/emailer.js","function":"Object.Emailer.setupFallbackTransport","line":116,"method":"setupFallbackTransport","native":false},{"column":10,"file":"/home/ubuntu/NodeBB/src/emailer.js","function":"Object.Emailer.registerApp","line":158,"method":"registerApp","native":false},{"column":10,"file":"/home/ubuntu/NodeBB/src/webserver.js","function":"Object.module.exports.listen","line":79,"method":"listen","native":false},{"column":14,"file":"/home/ubuntu/NodeBB/src/start.js","function":null,"line":55,"method":null,"native":false},{"column":14,"file":"/home/ubuntu/NodeBB/node_modules/async/dist/async.js","function":"nextTask","line":5324,"method":null,"native":false},{"column":9,"file":"/home/ubuntu/NodeBB/node_modules/async/dist/async.js","function":"next","line":5331,"method":null,"native":false},{"column":16,"file":"/home/ubuntu/NodeBB/node_modules/async/dist/async.js","function":null,"line":969,"method":null,"native":false},{"column":3,"file":"/home/ubuntu/NodeBB/src/database/index.js","function":null,"line":38,"method":null,"native":false},{"column":3,"file":"/home/ubuntu/NodeBB/src/database/mongo.js","function":null,"line":161,"method":null,"native":false},{"column":17,"file":"/home/ubuntu/NodeBB/node_modules/mongodb/lib/utils.js","function":"result","line":414,"method":null,"native":false},{"column":9,"file":"/home/ubuntu/NodeBB/node_modules/mongodb/lib/utils.js","function":"executeCallback","line":406,"method":null,"native":false},{"column":5,"file":"/home/ubuntu/NodeBB/node_modules/mongodb/lib/operations/mongo_client_ops.js","function":"err","line":286,"method":null,"native":false},{"column":5,"file":"/home/ubuntu/NodeBB/node_modules/mongodb/lib/operations/mongo_client_ops.js","function":"connectCallback","line":241,"method":null,"native":false}]}
2018-12-28T15:08:37.916Z [4568/28933] - error: key.split is not a function
TypeError: key.split is not a function
    at module.exports (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/well-known/index.js:45:28)
    at new SMTPTransport (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/smtp-transport/index.js:43:24)
    at Object.module.exports.createTransport (/home/ubuntu/NodeBB/node_modules/nodemailer/lib/nodemailer.js:54:27)
    at Object.Emailer.setupFallbackTransport (/home/ubuntu/NodeBB/src/emailer.js:116:40)
    at Object.Emailer.registerApp (/home/ubuntu/NodeBB/src/emailer.js:158:10)
    at Object.module.exports.listen (/home/ubuntu/NodeBB/src/webserver.js:79:10)
    at /home/ubuntu/NodeBB/src/start.js:55:14
    at nextTask (/home/ubuntu/NodeBB/node_modules/async/dist/async.js:5324:14)
    at next (/home/ubuntu/NodeBB/node_modules/async/dist/async.js:5331:9)
    at /home/ubuntu/NodeBB/node_modules/async/dist/async.js:969:16
    at /home/ubuntu/NodeBB/src/database/index.js:38:3
    at /home/ubuntu/NodeBB/src/database/mongo.js:161:3
    at result (/home/ubuntu/NodeBB/node_modules/mongodb/lib/utils.js:414:17)
    at executeCallback (/home/ubuntu/NodeBB/node_modules/mongodb/lib/utils.js:406:9)
    at err (/home/ubuntu/NodeBB/node_modules/mongodb/lib/operations/mongo_client_ops.js:286:5)
    at connectCallback (/home/ubuntu/NodeBB/node_modules/mongodb/lib/operations/mongo_client_ops.js:241:5)
2018-12-28T15:08:37.918Z [4568/28933] - info: [app] Shutdown (SIGTERM/SIGINT) Initialised.
[cluster] Child Process (28933) has exited (code: 1, signal: null)
[cluster] Spinning up another process...

VPS info

node -v v10.15.0
npm -v 6.4.1
Ubuntu 16.04 LTS
mongod --version
db version v3.6.0

ubuntu@VM-0-3-ubuntu:~/NodeBB$ cat config.json 
{
    "url": "http://forum.widora.io",
    "secret": "*********",
    "database": "mongo",
    "port": 4567,
    "mongo": {
        "host": "127.0.0.1",
        "port": "27017",
        "username": "nodebb",
        "password": "************",
        "database": "nodebb"
    },
    "socket.io": {
	"transports": ["polling"]
    }
}

@PitaJ thank you very much ! ,I will try it later.

Anyone know it ? : )

At present , I use wordpress and mediawiki on VPS , I want users to use NodeBB account login wordpress or wiki, there is such a plugin in NodeBB?

the widora community : http://sns.widora.io

I git clone v1.x.x branch.
today I git reset --hard fdd8514, then work OK!