why may be restarted?

[pikshub]

Why was such a problem? I wonder why.

21/5 16:38 [3769] - error: TypeError: Cannot read property '0' of undefined
at makeObject (/home/user/nodebb/src/database/redis/hash.js:55:27)
at Array.map (native)
at Multi.callback (/home/user/nodebb/src/database/redis/hash.js:65:22)
at Multi.execute_callback (/home/user/nodebb/node_modules/redis/index.js:1224:14)
at Command.callback (/home/user/nodebb/node_modules/redis/index.js:1169:14)
at RedisClient.return_reply (/home/user/nodebb/node_modules/redis/index.js:664:25)
at JavascriptReplyParser.reply_parser.send_reply (/home/user/nodebb/node_modules/redis/index.js:332:14)
at JavascriptReplyParser.run (/home/user/nodebb/node_modules/redis/lib/parsers/javascript.js:132:18)
at JavascriptReplyParser.execute (/home/user/nodebb/node_modules/redis/lib/parsers/javascript.js:107:10)
at Socket.<anonymous> (/home/user/nodebb/node_modules/redis/index.js:131:27)
TypeError: Cannot read property '0' of undefined
at makeObject (/home/user/nodebb/src/database/redis/hash.js:55:27)
at Array.map (native)
at Multi.callback (/home/user/nodebb/src/database/redis/hash.js:65:22)
at Multi.execute_callback (/home/user/nodebb/node_modules/redis/index.js:1224:14)
at Command.callback (/home/user/nodebb/node_modules/redis/index.js:1169:14)
at RedisClient.return_reply (/home/user/nodebb/node_modules/redis/index.js:664:25)
at JavascriptReplyParser.reply_parser.send_reply (/home/user/nodebb/node_modules/redis/index.js:332:14)
at JavascriptReplyParser.run (/home/user/nodebb/node_modules/redis/lib/parsers/javascript.js:132:18)
at JavascriptReplyParser.execute (/home/user/nodebb/node_modules/redis/lib/parsers/javascript.js:107:10)
at Socket.<anonymous> (/home/user/nodebb/node_modules/redis/index.js:131:27)
21/5 16:38 [3769] - info: [app] Shutdown (SIGTERM/SIGINT) Initialised.
21/5 16:38 [3769] - info: [app] Database connection closed.
21/5 16:38 [3769] - info: [app] Web server closed to connections.
21/5 16:38 [3769] - info: [app] Shutdown complete.
[cluster] Child Process (3769) has exited (code: 1, signal: null)
[cluster] Spinning up another process...
21/5 16:38 [30524] - info: Time: Sat May 21 2016 16:38:43 GMT-0400 (EDT)
21/5 16:38 [30524] - info: Initializing NodeBB v1.0.3
21/5 16:38 [30524] - warn: [plugins/nodebb-plugin-2factor] Hook action:user.loggedOut is deprecated, please use static:user.loggedOut instead.

21/5 16:38 [30524] - warn: [plugins/load] The following plugins may not be compatible with your version of NodeBB. This may cause unintended behaviour or crashing. In the event of an unresponsive NodeBB caused by this plugin, run ./nodebb reset -p PLUGINNAME to disable it.

• nodebb-plugin-youtube
• nodebb-plugin-leaderboard
• nodebb-plugin-blog-comments

21/5 16:39 [30524] - info: NodeBB Ready
21/5 16:39 [30524] - info: Enabling 'trust proxy'
21/5 16:39 [30524] - info: NodeBB is now listening on: 0.0.0.0:4567
21/5 16:39 [30524] - info: [plugins/spam-be-gone] Settings loaded