NodeJS App Build ist erfolgreich (Heroku) aber Anwendungsfehler in Heroku beim Start

Question

Ich verwende Cloud 9 IDE. Build ist erfolgreich, wenn ich

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

sein Ergebnis ist folgendes:

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 

Das ist mein 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 

Und das ist 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" 
    } 
} 

Aber immer noch gibt es einen Anwendungsfehler bei der Einführung der App:

Anwendungsfehler:
ist ein Fehler aufgetreten bei der Anwendung und Ihre Seite nicht bedient werden kann. Wenn Sie der Besitzer der Anwendung sind, überprüfen Sie Ihre Protokolle für Details.

Heroku Logs: falsche

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 

---

Irgendwelche Ideen, wo werde ich ??

Answer 1

Das Problem ist mit Ihrer mongoose Verbindung.

Haben Sie das heroku mongodb Addon installiert?

$heroku addons:create mongolab 

Weitere Informationen zur Verwendung von mongodb auf heroku finden Sie hier. nodejs-mongoose

Answer 2

Sie versuchen, zu einem lokalen Mongo-Server verbinden - MongoError: failed to connect to server [localhost:27017] in der Linie mongoose.connect("mongodb://localhost/restful_blog"); - aber es gibt keine mongodb in Heroku gebaut.

Sie müssen mongo mit einem der Heroku mongo-Plugin-Dienste ... MongoHQ usw. mit Ihrer App verbinden oder einen eigenen Datenbankserver einrichten.

Wenn Sie das Plugin verbinden, erhalten Sie eine eindeutige Host-URL für Ihre Datenbank, die Sie für Ihre Live-App anstelle von localhost: 27017 verwenden können. Und Sie können die URL über eine Umgebungsvariable mit dotenv für lokale und die Serverkonfiguration auf heroku setzen.