There's an error in pm2.log

[RaniSharim]

2017-09-04 01:59:01: [PM2] Resurrecting PM2
/xxx/.nvm/versions/node/v8.4.0/lib/node_modules/pm2/node_modules/async/dist/async.js:903
if (fn === null) throw new Error("Callback was already called.");
^

Error: Callback was already called.
at /xxx/.nvm/versions/node/v8.4.0/lib/node_modules/pm2/node_modules/async/dist/async.js:903:32
at WriteStream. (/xxx/.nvm/versions/node/v8.4.0/lib/node_modules/pm2/lib/Utility.js:162:13)
at emitOne (events.js:115:13)
at WriteStream.emit (events.js:210:7)
at onwriteError (_stream_writable.js:406:12)
at onwrite (_stream_writable.js:428:5)
at fs.js:2130:14
at FSReqWrap.wrapper [as oncomplete] (fs.js:691:5)

[Unitech]

f5ee34c

[Unitech]

Fixed on recently published pm2 (2.7.0):

$ npm install pm2@latest -g
$ pm2 update

Let me know if there is any issue,