2018-03-20T17:42:51.281724+00:00 app[web.1]: 2018-03-20T17:42:51.279Z [20] - error:  Error: Callback was already called.
2018-03-20T17:42:51.281740+00:00 app[web.1]:     at /app/node_modules/async/dist/async.js:955:32
2018-03-20T17:42:51.281742+00:00 app[web.1]:     at /app/src/database/redis.js:54:3
2018-03-20T17:42:51.281744+00:00 app[web.1]:     at RedisClient.<anonymous> (/app/src/database/redis.js:99:3)
2018-03-20T17:42:51.281746+00:00 app[web.1]:     at RedisClient.emit (events.js:180:13)
2018-03-20T17:42:51.281748+00:00 app[web.1]:     at RedisClient.on_ready (/app/node_modules/redis/index.js:486:10)
2018-03-20T17:42:51.281750+00:00 app[web.1]:     at RedisClient.on_info_cmd (/app/node_modules/redis/index.js:514:18)
2018-03-20T17:42:51.281751+00:00 app[web.1]:     at /app/node_modules/redis/index.js:535:14
2018-03-20T17:42:51.281753+00:00 app[web.1]:     at Object.callbackOrEmit [as callback_or_emit] (/app/node_modules/redis/lib/utils.js:89:9)
2018-03-20T17:42:51.281755+00:00 app[web.1]:     at Command.callback (/app/node_modules/redis/lib/individualCommands.js:157:15)
2018-03-20T17:42:51.281756+00:00 app[web.1]:     at normal_reply (/app/node_modules/redis/index.js:726:21)
2018-03-20T17:42:51.281758+00:00 app[web.1]:     at RedisClient.return_reply (/app/node_modules/redis/index.js:824:9)
2018-03-20T17:42:51.281760+00:00 app[web.1]:     at JavascriptRedisParser.returnReply (/app/node_modules/redis/index.js:192:18)
2018-03-20T17:42:51.281762+00:00 app[web.1]:     at JavascriptRedisParser.execute (/app/node_modules/redis-parser/lib/parser.js:574:12)
2018-03-20T17:42:51.281763+00:00 app[web.1]:     at Socket.<anonymous> (/app/node_modules/redis/index.js:274:27)
2018-03-20T17:42:51.281765+00:00 app[web.1]:     at Socket.emit (events.js:180:13)
2018-03-20T17:42:51.281767+00:00 app[web.1]:     at addChunk (_stream_readable.js:269:12)
2018-03-20T17:42:51.282044+00:00 app[web.1]: 2018-03-20T17:42:51.281Z [20] - info: [app] Shutdown (SIGTERM/SIGINT) Initialised.
2018-03-20T17:42:51.282451+00:00 app[web.1]: 2018-03-20T17:42:51.282Z [20] - info: [app] Database connection closed.
2018-03-20T17:42:51.282741+00:00 app
[web.1]: 2018-03-20T17:42:51.282Z [20] - info: [app] Web server closed to connections.
2018-03-20T17:42:51.282837+00:00 app[web.1]: 2018-03-20T17:42:51.282Z [20] - info: [app] Shutdown complete.