I had upgraded to 0.6.1 successfully, but all my plugins didn't make it, so I tried to go back to 0.5.7 (it seemed like a good idea at the time) and it said nope. I can't even get it to resolve, gives connection refused error.
It just loops stuff like this over and over again:
Clustering enabled: Spinning up 1 process(es).
2015-05-07T19:16:43.530Z - info: Time: Thu May 07 2015 15:16:43 GMT-0400 (EDT)
2015-05-07T19:16:43.536Z - info: Initializing NodeBB v0.5.7
2015-05-07T19:16:43.536Z - info: * using configuration stored in: /home/jarvis/nodebbdir/config.json
2015-05-07T19:16:43.537Z - info: * using redis store at 127.0.0.1:6379
2015-05-07T19:16:43.537Z - info: * using themes stored in: /home/jarvis/nodebbdir/node_modules
2015-05-07T19:16:44.632Z - info: [notifications.init] Registering jobs.
2015-05-07T19:16:44.636Z - info: [user.startJobs] Registering User Jobs
2015-05-07T19:16:44.638Z - info: Enabling 'trust proxy'
[cluster] Child Process (25352) listening for connections.
2015-05-07T19:16:44.771Z - info: [themes] Using theme nodebb-theme-dark-rectangles
2015-05-07T19:16:44.774Z - error: TypeError: Cannot read property 'id' of undefined
at Object.Meta.themes.setPath (/home/jarvis/nodebbdir/src/meta/themes.js:113:59)
at routeCurrentTheme (/home/jarvis/nodebbdir/src/middleware/index.js:45:14)
at module.exports (/home/jarvis/nodebbdir/src/middleware/index.js:110:2)
at require.exec.cwd (/home/jarvis/nodebbdir/src/webserver.js:62:16)
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:592:17
at done (/home/jarvis/nodebbdir/node_modules/async/lib/async.js:135:19)
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:32:16
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:589:21
at /home/jarvis/nodebbdir/src/meta/themes.js:61:6
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:254:17
TypeError: Cannot read property 'id' of undefined
at Object.Meta.themes.setPath (/home/jarvis/nodebbdir/src/meta/themes.js:113:59)
at routeCurrentTheme (/home/jarvis/nodebbdir/src/middleware/index.js:45:14)
at module.exports (/home/jarvis/nodebbdir/src/middleware/index.js:110:2)
at require.exec.cwd (/home/jarvis/nodebbdir/src/webserver.js:62:16)
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:592:17
at done (/home/jarvis/nodebbdir/node_modules/async/lib/async.js:135:19)
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:32:16
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:589:21
at /home/jarvis/nodebbdir/src/meta/themes.js:61:6
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:254:17
2015-05-07T19:16:44.777Z - info: [app] Shutdown (SIGTERM/SIGINT) Initialised.
2015-05-07T19:16:44.778Z - info: [app] Database connection closed.
net.js:1236
throw new Error('Not running');
^
Error: Not running
at Server.close (net.js:1236:11)
at shutdown (/home/jarvis/nodebbdir/app.js:344:36)
at process.<anonymous> (/home/jarvis/nodebbdir/app.js:181:7)
at process.emit (events.js:95:17)
at process._fatalException (node.js:272:26)
[cluster] Child Process (25352) has disconnected
[cluster] Child Process (25352) has exited (code: 7, signal: null)
[cluster] Spinning up another process...
2015-05-07T19:16:44.943Z - info: Time: Thu May 07 2015 15:16:44 GMT-0400 (EDT)
2015-05-07T19:16:44.946Z - info: Initializing NodeBB v0.5.7
2015-05-07T19:16:44.947Z - info: * using configuration stored in: /home/jarvis/nodebbdir/config.json
2015-05-07T19:16:44.947Z - info: * using redis store at 127.0.0.1:6379
2015-05-07T19:16:44.947Z - info: * using themes stored in: /home/jarvis/nodebbdir/node_modules
2015-05-07T19:16:46.010Z - info: [notifications.init] Registering jobs.
2015-05-07T19:16:46.013Z - info: [user.startJobs] Registering User Jobs
2015-05-07T19:16:46.016Z - info: Enabling 'trust proxy'
[cluster] Child Process (25360) listening for connections.
2015-05-07T19:16:46.150Z - info: [themes] Using theme nodebb-theme-dark-rectangles
2015-05-07T19:16:46.154Z - error: TypeError: Cannot read property 'id' of undefined
at Object.Meta.themes.setPath (/home/jarvis/nodebbdir/src/meta/themes.js:113:59)
at routeCurrentTheme (/home/jarvis/nodebbdir/src/middleware/index.js:45:14)
at module.exports (/home/jarvis/nodebbdir/src/middleware/index.js:110:2)
at require.exec.cwd (/home/jarvis/nodebbdir/src/webserver.js:62:16)
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:592:17
at done (/home/jarvis/nodebbdir/node_modules/async/lib/async.js:135:19)
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:32:16
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:589:21
at /home/jarvis/nodebbdir/src/meta/themes.js:61:6
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:254:17
TypeError: Cannot read property 'id' of undefined
at Object.Meta.themes.setPath (/home/jarvis/nodebbdir/src/meta/themes.js:113:59)
at routeCurrentTheme (/home/jarvis/nodebbdir/src/middleware/index.js:45:14)
at module.exports (/home/jarvis/nodebbdir/src/middleware/index.js:110:2)
at require.exec.cwd (/home/jarvis/nodebbdir/src/webserver.js:62:16)
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:592:17
at done (/home/jarvis/nodebbdir/node_modules/async/lib/async.js:135:19)
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:32:16
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:589:21
at /home/jarvis/nodebbdir/src/meta/themes.js:61:6
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:254:17
2015-05-07T19:16:46.157Z - info: [app] Shutdown (SIGTERM/SIGINT) Initialised.
2015-05-07T19:16:46.157Z - info: [app] Database connection closed.
Did I break it forever? 
I see some errors calling the theme nodebb-theme-dark-rectangles, but I had removed it. So is it just looping because herp derp no theme set at all anymore?
@Purupuru try this
./nodebb reset theme
You'll also need to go back to 0.6.1, once you've run ./nodebb upgrade on a major version change such as from 5.x to 6.x, you can't go back.
I couldn't even reset the theme until I went back to 0.6.1 (it would just say nothing reset). I've gone back to 0.6.1, and reset theme to vanilla, but when ./nodebb start, now this:
jarvis@AVENGURZ:~/nodebbdir$ ./nodebb start
Starting NodeBB
"./nodebb stop" to stop the NodeBB server
"./nodebb log" to view server output
jarvis@AVENGURZ:~/nodebbdir$
url.js:107
throw new TypeError("Parameter 'url' must be a string, not " + typeof url)
^
TypeError: Parameter 'url' must be a string, not undefined
at Url.parse (url.js:107:11)
at Object.urlParse [as parse] (url.js:101:5)
at getPorts (/home/jarvis/nodebbdir/loader.js:184:22)
at Loader.start (/home/jarvis/nodebbdir/loader.js:141:13)
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:610:21
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:249:17
at iterate (/home/jarvis/nodebbdir/node_modules/async/lib/async.js:149:13)
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:160:25
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:251:21
at /home/jarvis/nodebbdir/node_modules/async/lib/async.js:615:34
Then it just stops and makes me cry 
herp derp, just had to rerun setup and like magic it's back.
@Purupuru Glad to hear it!
./nodebb upgrade should've taken care of updating the config.json file for you -- not sure why that didn't work out.
