fixed #3218

app.js

@@ -109,6 +109,7 @@ function loadConfig() {
 
 function start() {
 	loadConfig();
+	var db = require('./src/database');
 
 	// nconf defaults, if not set in config
 	if (!nconf.get('upload_path')) {
@@ -176,9 +177,8 @@ function start() {
 	});
 
 	async.waterfall([
-		function(next) {
-			require('./src/database').init(next);
-		},
+		async.apply(db.init),
+		async.apply(db.checkCompatibility),
 		function(next) {
 			require('./src/meta').configs.init(next);
 		},
@@ -204,7 +204,12 @@ function start() {
 		}
 	], function(err) {
 		if (err) {
-			winston.error(err.stack);
+			if (err.stacktrace !== false) {
+				winston.error(err.stack);
+			} else {
+				winston.error(err.message);
+			}
+
 			process.exit();
 		}
 	});

src/database/mongo.js

@@ -8,6 +8,7 @@
 		nconf = require('nconf'),
 		session = require('express-session'),
 		_ = require('underscore'),
+		semver = require('semver'),
 		db, mongoClient;
 
 	_.mixin(require('underscore.deep'));
@@ -137,6 +138,7 @@
 			}
 
 			function createIndices() {
+				winston.info('[database] Checking database indices.')
 				async.parallel([
 					async.apply(createIndex, 'objects', {_key: 1, score: -1}, {background: true}),
 					async.apply(createIndex, 'objects', {_key: 1, value: -1}, {background: true, unique: true, sparse: true}),
@@ -164,6 +166,17 @@
 		});
 	};
 
+	module.checkCompatibility = function(callback) {
+		// For MongoDB, we need to ensure that the mongodb package is >= 2.0.0
+		var mongoPkg = require.main.require('./node_modules/mongodb/package.json'),
+			err = semver.lt(mongoPkg.version, '2.0.0') ? new Error('The `mongodb` package is out-of-date, please run `./nodebb setup` again.') : null;
+
+		if (err) {
+			err.stacktrace = false;
+		}
+		callback(err);
+	};
+
 	module.info = function(db, callback) {
 		db.stats({scale:1024}, function(err, stats) {
 			if(err) {

src/database/redis.js

@@ -5,6 +5,7 @@
 	var winston = require('winston'),
 		nconf = require('nconf'),
 		path = require('path'),
+		semver = require('semver'),
 		session = require('express-session'),
 		utils = require('./../../public/src/utils.js'),
 		redis,
@@ -111,6 +112,17 @@
 		return cxn;
 	};
 
+	module.checkCompatibility = function(callback) {
+		// Redis requires v2.8.9
+		module.info(module.client, function(err, info) {
+			var err = semver.lt(info.redis_version, '2.8.9') ? new Error('Your Redis version is not new enough to support NodeBB, please upgrade Redis to v2.8.9 or higher.') : null;
+			if (err) {
+				err.stacktrace = false;
+			}
+			callback(err);
+		});
+	};
+
 	module.close = function() {
 		redisClient.quit();
 	};