NodeJS应用程序的构build是成功的(Heroku),但在启动时,Heroku的应用程序错误

我正在使用Cloud 9 IDE。 当我做的时候,构build是成功的

git add . git commit -m "first_commit" git push heroku master 

其结果是这样的:

  Counting objects: 3, done. Delta compression using up to 8 threads. Compressing objects: 100% (2/2), done. Writing objects: 100% (3/3), 280 bytes | 0 bytes/s, done. Total 3 (delta 1), reused 0 (delta 0) remote: Compressing source files... done. remote: Building source: remote: remote: -----> Node.js app detected remote: remote: -----> Creating runtime environment remote: remote: NPM_CONFIG_LOGLEVEL=error remote: NPM_CONFIG_PRODUCTION=true remote: NODE_VERBOSE=false remote: NODE_ENV=production remote: NODE_MODULES_CACHE=true remote: remote: -----> Installing binaries remote: engines.node (package.json): 4.7.3 remote: engines.npm (package.json): 2.15.11 remote: remote: Resolving node version 4.7.3... remote: Downloading and installing node 4.7.3... remote: npm 2.15.11 already installed with node remote: remote: -----> Restoring cache remote: Loading 2 from cacheDirectories (default): remote: - node_modules remote: - bower_components (not cached - skipping) remote: remote: -----> Building dependencies remote: Installing node modules (package.json) remote: remote: -----> Caching build remote: Clearing previous node cache remote: Saving 2 cacheDirectories (default): remote: - node_modules remote: - bower_components (nothing to cache) remote: remote: -----> Build succeeded! remote: -----> Discovering process types remote: Procfile declares types -> (none) remote: Default types for buildpack -> web remote: remote: -----> Compressing... remote: Done: 13.8M remote: -----> Launching... remote: Released v5 remote: https://still-reef-69131.herokuapp.com/ deployed to Heroku remote: remote: Verifying deploy... done. To https://git.heroku.com/still-reef-69131.git c263d3a..ad74a53 master -> master 

这是我的app.js

 var express = require("express") ; var app = express(); app.use(express.static("public")) ; var sanitizer = require("express-sanitizer") ; var methodOverride = require("method-override") ; app.use(methodOverride("_method")) ; var bodyparser = require("body-parser") ; app.use(bodyparser.urlencoded({extended :true})) ; app.use(sanitizer()) ; var mongoose = require("mongoose") ; mongoose.connect("mongodb://localhost/restful_blog") ; var blogSchema = new mongoose.Schema({ title: String, image: String, body: String, date: {type: Date, default: Date.now} }); var blog = mongoose.model("blog", blogSchema); app.get("/", function(req,res){ res.redirect("/blogs") ; }) ; app.get("/blogs" , function(req,res){ blog.find({},function(err , maal){ if(err) console.log(err) ; else res.render("index.ejs",{blogs : maal}) ; }) ; }) ; app.get("/blogs/new" , function(req,res){ res.render("new.ejs") ; }) ; app.post("/blogs" , function(req,res){ req.body.body = req.sanitize(req.body.body) ; blog.create({title : req.body.title , body : req.body.body , image : req.body.image} , function(err,newblog){ if(err) console.log(err) ; else res.redirect("/blogs") ; }) ; }) ; app.get("/blogs/:id" , function(req,res){ blog.findById(req.params.id , function(err,maal){ if(err) console.log(err) ; else { res.render("show.ejs" , {readmore : maal}) ; } }) ; }) ; app.get("/blogs/:id/edit" , function(req,res){ blog.findById(req.params.id , function(err,maal){ if(err) console.log(err) ; else { res.render("edit.ejs",{ blog:maal }) ; } }) ; }) ; app.put("/blogs/:id/edit" , function(req,res){ req.body.body = req.sanitize(req.body.body) ; blog.findByIdAndUpdate(req.params.id , req.body , function(err,maal){ if(err) console.log(err) ; else { res.redirect("/blogs/" + maal._id) ; } }) ; }) ; app.delete("/blogs/:id" , function(req,res){ blog.findByIdAndRemove(req.params.id , function(err){ // No maal here as there is nothing if(err) console.log(err) ; else res.redirect("/blogs") ; }) ; }) ; app.listen(process.env.PORT , process.env.IP , function(){ console.log("Server is ON") ; }) ; // Server start 

这是package.json

 { "name": "restful_blog_app", "version": "1.0.0", "description": "", "main": "app.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1", "start": "node app.js" }, "engines": { "node": "4.7.3" , "npm": "2.15.11" }, "author": "MeMyself&I", "license": "ISC", "dependencies": { "body-parser": "^1.17.2", "ejs": "^2.5.6", "express": "^4.15.3", "express-sanitizer": "^1.0.2", "method-override": "^2.3.9", "mongoose": "^4.11.1" } } 

但在应用程序启动时仍然存在应用程序错误:

应用程序错误 :
应用程序发生错误,您的页面无法送达。 如果您是应用程序所有者,请查看日志以获取详细信息。

Heroku日志:

 2017-10-26T11:41:48.495327+00:00 app[web.1]: 2017-10-26T11:41:48.495329+00:00 app[web.1]: events.js:141 2017-10-26T11:41:48.495330+00:00 app[web.1]: throw er; // Unhandled 'error' event 2017-10-26T11:41:48.495330+00:00 app[web.1]: ^ 2017-10-26T11:41:48.496369+00:00 app[web.1]: MongoError: failed to connect to server [localhost:27017] on first connect [MongoError: connect ECONNREFUSED 127.0.0.1:27017] 2017-10-26T11:41:48.496373+00:00 app[web.1]: at null.<anonymous> (/app/node_modules/mongoose/node_modules/mongodb/node_modules/mongodb-core/lib/connection/pool.js:280:12) 2017-10-26T11:41:48.496371+00:00 app[web.1]: at null.<anonymous> (/app/node_modules/mongoose/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:336:35) 2017-10-26T11:41:48.496371+00:00 app[web.1]: at emitOne (events.js:77:13) 2017-10-26T11:41:48.496372+00:00 app[web.1]: at emit (events.js:169:7) 2017-10-26T11:41:48.496373+00:00 app[web.1]: at emitTwo (events.js:87:13) 2017-10-26T11:41:48.496373+00:00 app[web.1]: at g (events.js:260:16) 2017-10-26T11:41:48.496374+00:00 app[web.1]: at emit (events.js:172:7) 2017-10-26T11:41:48.496374+00:00 app[web.1]: at Socket.<anonymous> (/app/node_modules/mongoose/node_modules/mongodb/node_modules/mongodb-core/lib/connection/connection.js:187:49) 2017-10-26T11:41:48.496375+00:00 app[web.1]: at Socket.g (events.js:260:16) 2017-10-26T11:41:48.496375+00:00 app[web.1]: at emitOne (events.js:77:13) 2017-10-26T11:41:48.496376+00:00 app[web.1]: at Socket.emit (events.js:169:7) 2017-10-26T11:41:48.496376+00:00 app[web.1]: at emitErrorNT (net.js:1269:8) 2017-10-26T11:41:48.496377+00:00 app[web.1]: at nextTickCallbackWith2Args (node.js:458:9) 2017-10-26T11:41:48.496377+00:00 app[web.1]: at process._tickCallback (node.js:372:17) 2017-10-26T11:41:48.520747+00:00 app[web.1]: npm ERR! Linux 3.13.0-133-generic 2017-10-26T11:41:48.522269+00:00 app[web.1]: npm ERR! npm v2.15.11 2017-10-26T11:41:48.510469+00:00 app[web.1]: 2017-10-26T11:41:48.521254+00:00 app[web.1]: npm ERR! argv "/app/.heroku/node/bin/node" "/app/.heroku/node/bin/npm" "start" 2017-10-26T11:41:48.521574+00:00 app[web.1]: npm ERR! node v4.7.3 2017-10-26T11:41:48.522544+00:00 app[web.1]: npm ERR! code ELIFECYCLE 2017-10-26T11:41:48.522760+00:00 app[web.1]: npm ERR! restful_blog_app@1.0.0 start: `node app.js` 2017-10-26T11:41:48.523180+00:00 app[web.1]: npm ERR! 2017-10-26T11:41:48.522963+00:00 app[web.1]: npm ERR! Exit status 1 2017-10-26T11:41:48.523387+00:00 app[web.1]: npm ERR! Failed at the restful_blog_app@1.0.0 start script 'node app.js'. 2017-10-26T11:41:48.523612+00:00 app[web.1]: npm ERR! This is most likely a problem with the restful_blog_app package, 2017-10-26T11:41:48.523824+00:00 app[web.1]: npm ERR! not with npm itself. 2017-10-26T11:41:48.524012+00:00 app[web.1]: npm ERR! Tell the author that this fails on your system: 2017-10-26T11:41:48.524213+00:00 app[web.1]: npm ERR! node app.js 2017-10-26T11:41:48.524422+00:00 app[web.1]: npm ERR! You can get information on how to open an issue for this project with: 2017-10-26T11:41:48.524630+00:00 app[web.1]: npm ERR! npm bugs restful_blog_app 2017-10-26T11:41:48.525228+00:00 app[web.1]: npm ERR! npm owner ls restful_blog_app 2017-10-26T11:41:48.524834+00:00 app[web.1]: npm ERR! Or if that isn't available, you can get their info via: 2017-10-26T11:41:48.525418+00:00 app[web.1]: npm ERR! There is likely additional logging output above. 2017-10-26T11:41:48.525037+00:00 app[web.1]: npm ERR! 2017-10-26T11:41:48.530341+00:00 app[web.1]: 2017-10-26T11:41:48.530616+00:00 app[web.1]: npm ERR! Please include the following file with any support request: 2017-10-26T11:41:48.530813+00:00 app[web.1]: npm ERR! /app/npm-debug.log 2017-10-26T11:41:48.620147+00:00 heroku[web.1]: State changed from starting to crashed 2017-10-26T11:41:48.607867+00:00 heroku[web.1]: Process exited with status 1 2017-10-26T11:42:04.141504+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=still-reef-69131.herokuapp.com request_id=525c4f82-20fc-4d02-9b21-848c0011e451 fwd="115.97.201.36" dyno= connect= service= status=503 bytes= protocol=https 2017-10-26T11:42:05.503594+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=still-reef-69131.herokuapp.com request_id=648fd443-3661-49d1-87f7-7ba27c065dff fwd="115.97.201.36" dyno= connect= service= status=503 bytes= protocol=https 2017-10-26T11:43:56.405496+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=still-reef-69131.herokuapp.com request_id=6e94416f-ac28-4196-8ecd-7f701e96785e fwd="115.97.201.36" dyno= connect= service= status=503 bytes= protocol=https 2017-10-26T11:43:57.089498+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=still-reef-69131.herokuapp.com request_id=b2069968-30b5-4875-9b04-ad3fa5c38419 fwd="115.97.201.36" dyno= connect= service= status=503 bytes= protocol=https 

任何想法,我哪里错了?

问题是你的mongoose连接。

你有没有安装heroku mongodb插件?

 $heroku addons:create mongolab 

有关在heroku上使用mongodb的更多信息,请点击这里。 的NodeJS,mongoose

你尝试连接到本地mongo服务器 – MongoError: failed to connect to server [localhost:27017]在行mongoose.connect("mongodb://localhost/restful_blog"); – 但是没有内build到heroku中的mongodb。

您需要使用Heroku mongo插件服务之一将Mongo连接到您的应用程序… MongoHQ等或设置您自己的数据库服务器。

当你连接插件时,你会得到一个你的数据库的唯一主机url,你可以使用你的实时应用程序而不是localhost:27017。 你可以通过一个环境variables来设置URL,这个环境variables是本地的dotenv和你的服务器在heroku上的configuration。