Heroku + Node.js (express) - Application Error - node.js

Question

I'm writing a basic Node.js HTTP request&response application following a step-by-step tutorial.
After deploying to Heroku if I visit the URL I get an "Application Error".
It has already happened the same. I waited some time, deleted the Heroku app, pushed the Heroku app back and it was working fine again.
Then it stopped again.
If I try GET and POST queries (via Postman) I get a "503 Service Unavailable" error.
I attach the Heroku Log that tells me to open a node issue but locally (localhost:3000) is working fine.
The error is H10 "App Crashed"
Maybe someone knows what the issue is.
I attach my Node.js code:
var express = require('express');
var bodyParser = require('body-Parser');
var _ = require('underscore');
var app = express();
var PORT = process.env.PORT || 3000;
var todos = [];
var todoNextId = 1;
app.use(bodyParser.json());
//GET /[root]
app.get('/', function (req, res) {
res.send('Todo API Root');
});
//GET /todos
app.get('/todos', function (req, res) {
res.json(todos);
});
//GET /todos/:id
app.get('/todos/:id', function (req, res) {
var todoId = parseInt(req.params.id);
var matchedToDo = _.findWhere(todos, {id: todoId});
if (matchedToDo) {
res.json(matchedToDo);
} else {
res.status(404).send();
}
});
//POST /todos
app.post('/todos', function (req, res) {
var body = _.pick(req.body, 'description', 'completed');
if (!_.isBoolean(body.completed) || !_.isString(body.description) || body.description.trim().length === 0) {
return res.status(400).send();
}
body.description = body.description.trim();
body.id = todoNextId++;
todos.push(body);
res.json(body);
});
app.listen(PORT, function (){
console.log('Express listening on port ' + PORT);
});
Thanks for helping.
2016-05-02T17:08:52.094535+00:00 heroku[api]: Enable Logplex by xxx#gmail.com 2016-05-02T17:08:52.094582+00:00 heroku[api]: Release v2 created by xxx#gmail.com
2016-05-02T17:10:19.718255+00:00 heroku[api]: Scale to web=1 by xxx#gmail.com
2016-05-02T17:10:19.719361+00:00 heroku[api]: Release v3 created by xxx#gmail.com
2016-05-02T17:10:19.719361+00:00 heroku[api]: Deploy 7c303de by xxx#gmail.com
2016-05-02T17:10:20.663812+00:00 heroku[slug-compiler]: Slug compilation started
2016-05-02T17:10:20.663829+00:00 heroku[slug-compiler]: Slug compilation finished
2016-05-02T17:10:22.387983+00:00 heroku[web.1]: Starting process with command `npm start`
2016-05-02T17:10:24.378611+00:00 app[web.1]: > todo-api#1.0.0 start /app
2016-05-02T17:10:24.378615+00:00 app[web.1]: > node server.js
2016-05-02T17:10:24.378616+00:00 app[web.1]:
2016-05-02T17:10:24.378601+00:00 app[web.1]:
2016-05-02T17:10:24.539535+00:00 app[web.1]: ^
2016-05-02T17:10:24.539505+00:00 app[web.1]: module.js:327
2016-05-02T17:10:24.539535+00:00 app[web.1]:
2016-05-02T17:10:24.539533+00:00 app[web.1]: throw err;
2016-05-02T17:10:24.539538+00:00 app[web.1]: at Module.require (module.js:353:17)
2016-05-02T17:10:24.539539+00:00 app[web.1]: at require (internal/module.js:12:17)
2016-05-02T17:10:24.539537+00:00 app[web.1]: at Function.Module._resolveFilename (module.js:325:15)
2016-05-02T17:10:24.539538+00:00 app[web.1]: at Function.Module._load (module.js:276:25)
2016-05-02T17:10:24.539539+00:00 app[web.1]: at Object.<anonymous> (/app/server.js:2:18)
2016-05-02T17:10:24.539541+00:00 app[web.1]: at Object.Module._extensions..js (module.js:416:10)
2016-05-02T17:10:24.539543+00:00 app[web.1]: at Function.Module.runMain (module.js:441:10)
2016-05-02T17:10:24.539541+00:00 app[web.1]: at Module.load (module.js:343:32)
2016-05-02T17:10:24.539540+00:00 app[web.1]: at Module._compile (module.js:409:26)
2016-05-02T17:10:24.539536+00:00 app[web.1]: Error: Cannot find module 'body-Parser'
2016-05-02T17:10:24.552923+00:00 app[web.1]: npm ERR! Linux 3.13.0-79-generic
2016-05-02T17:10:24.553580+00:00 app[web.1]: npm ERR! node v4.4.3
2016-05-02T17:10:24.546698+00:00 app[web.1]:
2016-05-02T17:10:24.554229+00:00 app[web.1]: npm ERR! npm v2.15.1
2016-05-02T17:10:24.555005+00:00 app[web.1]: npm ERR! Exit status 1
2016-05-02T17:10:24.539542+00:00 app[web.1]: at Function.Module._load (module.js:300:12)
2016-05-02T17:10:24.554626+00:00 app[web.1]: npm ERR! code ELIFECYCLE
2016-05-02T17:10:24.555172+00:00 app[web.1]: npm ERR!
2016-05-02T17:10:24.555617+00:00 app[web.1]: npm ERR! not with npm itself.
2016-05-02T17:10:24.555698+00:00 app[web.1]: npm ERR! Tell the author that this fails on your system:
2016-05-02T17:10:24.555885+00:00 app[web.1]: npm ERR! You can get information on how to open an issue for this project with:
2016-05-02T17:10:24.555495+00:00 app[web.1]: npm ERR! This is most likely a problem with the todo-api package,
2016-05-02T17:10:24.554849+00:00 app[web.1]: npm ERR! todo-api#1.0.0 start: `node server.js`
2016-05-02T17:10:24.553350+00:00 app[web.1]: npm ERR! argv "/app/.heroku/node/bin/node" "/app/.heroku/node/bin/npm" "start"
2016-05-02T17:10:24.556081+00:00 app[web.1]: npm ERR! Or if that isn't available, you can get their info via:
2016-05-02T17:10:24.555346+00:00 app[web.1]: npm ERR! Failed at the todo-api#1.0.0 start script 'node server.js'.
2016-05-02T17:10:24.556309+00:00 app[web.1]: npm ERR! npm owner ls todo-api
2016-05-02T17:10:24.555786+00:00 app[web.1]: npm ERR! node server.js
2016-05-02T17:10:24.555982+00:00 app[web.1]: npm ERR! npm bugs todo-api
2016-05-02T17:10:24.556157+00:00 app[web.1]: npm ERR!
2016-05-02T17:10:24.559818+00:00 app[web.1]: npm ERR! Please include the following file with any support request:
2016-05-02T17:10:24.559924+00:00 app[web.1]: npm ERR! /app/npm-debug.log
2016-05-02T17:10:24.556417+00:00 app[web.1]: npm ERR! There is likely additional logging output above.
2016-05-02T17:10:24.559659+00:00 app[web.1]:
2016-05-02T17:10:25.340763+00:00 heroku[web.1]: State changed from starting to crashed
2016-05-02T17:10:25.341871+00:00 heroku[web.1]: State changed from crashed to starting
2016-05-02T17:10:25.335969+00:00 heroku[web.1]: Process exited with status 1
2016-05-02T17:10:26.442330+00:00 heroku[web.1]: Starting process with command `npm start`
2016-05-02T17:10:29.267867+00:00 app[web.1]:
2016-05-02T17:10:29.267893+00:00 app[web.1]: > todo-api#1.0.0 start /app
2016-05-02T17:10:29.267895+00:00 app[web.1]:
2016-05-02T17:10:29.267894+00:00 app[web.1]: > node server.js
2016-05-02T17:10:29.703937+00:00 app[web.1]: module.js:327
2016-05-02T17:10:29.703975+00:00 app[web.1]: throw err;
2016-05-02T17:10:29.703978+00:00 app[web.1]: ^
2016-05-02T17:10:29.703978+00:00 app[web.1]:
2016-05-02T17:10:29.703985+00:00 app[web.1]: at Function.Module._resolveFilename (module.js:325:15)
2016-05-02T17:10:29.703988+00:00 app[web.1]: at Module._compile (module.js:409:26)
2016-05-02T17:10:29.703989+00:00 app[web.1]: at Module.load (module.js:343:32)
2016-05-02T17:10:29.703990+00:00 app[web.1]: at Function.Module._load (module.js:300:12)
2016-05-02T17:10:29.721879+00:00 app[web.1]:
2016-05-02T17:10:29.733721+00:00 app[web.1]: npm ERR! Linux 3.13.0-79-generic
2016-05-02T17:10:29.703990+00:00 app[web.1]: at Function.Module.runMain (module.js:441:10)
2016-05-02T17:10:29.734824+00:00 app[web.1]: npm ERR! argv "/app/.heroku/node/bin/node" "/app/.heroku/node/bin/npm" "start"
2016-05-02T17:10:29.703987+00:00 app[web.1]: at require (internal/module.js:12:17)
2016-05-02T17:10:29.703984+00:00 app[web.1]: Error: Cannot find module 'body-Parser'
2016-05-02T17:10:29.703988+00:00 app[web.1]: at Object.<anonymous> (/app/server.js:2:18)
2016-05-02T17:10:29.703986+00:00 app[web.1]: at Module.require (module.js:353:17)
2016-05-02T17:10:29.703989+00:00 app[web.1]: at Object.Module._extensions..js (module.js:416:10)
2016-05-02T17:10:29.703986+00:00 app[web.1]: at Function.Module._load (module.js:276:25)
2016-05-02T17:10:29.737258+00:00 app[web.1]: npm ERR! npm v2.15.1
2016-05-02T17:10:29.737687+00:00 app[web.1]: npm ERR! code ELIFECYCLE
2016-05-02T17:10:29.735275+00:00 app[web.1]: npm ERR! node v4.4.3
2016-05-02T17:10:29.738035+00:00 app[web.1]: npm ERR! todo-api#1.0.0 start: `node server.js`
2016-05-02T17:10:29.738349+00:00 app[web.1]: npm ERR! Exit status 1
2016-05-02T17:10:29.738718+00:00 app[web.1]: npm ERR!
2016-05-02T17:10:29.739200+00:00 app[web.1]: npm ERR! Failed at the todo-api#1.0.0 start script 'node server.js'.
2016-05-02T17:10:29.740147+00:00 app[web.1]: npm ERR! Tell the author that this fails on your system:
2016-05-02T17:10:29.739540+00:00 app[web.1]: npm ERR! This is most likely a problem with the todo-api package,
2016-05-02T17:10:29.739862+00:00 app[web.1]: npm ERR! not with npm itself.
2016-05-02T17:10:29.740460+00:00 app[web.1]: npm ERR! node server.js
2016-05-02T17:10:29.740772+00:00 app[web.1]: npm ERR! You can get information on how to open an issue for this project with:
2016-05-02T17:10:29.741082+00:00 app[web.1]: npm ERR! npm bugs todo-api
2016-05-02T17:10:29.741644+00:00 app[web.1]: npm ERR! Or if that isn't available, you can get their info via:
2016-05-02T17:10:29.741966+00:00 app[web.1]: npm ERR!
2016-05-02T17:10:29.742244+00:00 app[web.1]: npm ERR! npm owner ls todo-api
2016-05-02T17:10:29.742560+00:00 app[web.1]: npm ERR! There is likely additional logging output above.
2016-05-02T17:10:29.747872+00:00 app[web.1]:
2016-05-02T17:10:29.748529+00:00 app[web.1]: npm ERR! Please include the following file with any support request:
2016-05-02T17:10:29.748823+00:00 app[web.1]: npm ERR! /app/npm-debug.log
2016-05-02T17:10:30.824809+00:00 heroku[web.1]: Process exited with status 1
2016-05-02T17:10:30.842383+00:00 heroku[web.1]: State changed from starting to crashed
2016-05-02T17:10:34.224806+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=matteo-todo-api.herokuapp.com request_id=f4914bf6-ae6a-4390-a598-ba1e2aa6d598 fwd="2.233.72.96" dyno= connect= service= status=503 bytes=
2016-05-02T17:10:35.375423+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=matteo-todo-api.herokuapp.com request_id=69fe5fe5-9945-4a77-8ca9-564389b58aa9 fwd="2.233.72.96" dyno= connect= service= status=503 bytes=

Answer 1

you have wrong dependency. body-Parser should be body-parser. small "p" not capital "P".