Parse-Server NPM Install - Internal Server Error - node.js

Question

I completed the Parse-Serve npm install as follows
$ npm install -g parse-server mongodb-runner
$ mongodb-runner start
$ parse-server --appId APPLICATION_ID --masterKey MASTER_KEY
when I tried to access it with the follow command.....
$ curl -X POST -H "X-Parse-Application-Id: AppID123" -H "Content-Type: application/json" -d '{"score":1337,"playerName":"Sean Plott","cheatMode":false}' http://localhost:1337/parse/classes/GameScore
i got the following error:
{"code":1,"message":"Internal server error."}
Here is the result from running parse-server....
$ parse-server --appId AppID123 --masterKey Master123
appId: AppID8Rasp
masterKey: ***REDACTED***
port: 1337
mountPath: /parse
maxUploadSize: 20mb
serverURL: http://localhost:1337/parse
parse-server running on http://localhost:1337/parse
warn: Unable to ensure uniqueness for usernames: MongoError: failed to connect to server [localhost:27017] on first connect
at null.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:311:35)
at emitOne (events.js:77:13)
at emit (events.js:169:7)
at null.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/connection/pool.js:254:12)
at g (events.js:260:16)
at emitTwo (events.js:87:13)
at emit (events.js:172:7)
at Socket.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/connection/connection.js:158:49)
at Socket.g (events.js:260:16)
at emitOne (events.js:77:13)
warn: Unable to ensure uniqueness for user email addresses: MongoError: failed to connect to server [localhost:27017] on first connect
at null.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:311:35)
at emitOne (events.js:77:13)
at emit (events.js:169:7)
at null.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/connection/pool.js:254:12)
at g (events.js:260:16)
at emitTwo (events.js:87:13)
at emit (events.js:172:7)
at Socket.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/connection/connection.js:158:49)
at Socket.g (events.js:260:16)
at emitOne (events.js:77:13)
error: Error generating response. { [MongoError: failed to connect to server [localhost:27017] on first connect]
name: 'MongoError',
message: 'failed to connect to server [localhost:27017] on first connect' } name=MongoError, message=failed to connect to server [localhost:27017] on first connect
error: Uncaught internal server error. { [MongoError: failed to connect to server [localhost:27017] on first connect]
name: 'MongoError',
message: 'failed to connect to server [localhost:27017] on first connect' } MongoError: failed to connect to server [localhost:27017] on first connect
at null.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:311:35)
at emitOne (events.js:77:13)
at emit (events.js:169:7)
at null.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/connection/pool.js:254:12)
at g (events.js:260:16)
at emitTwo (events.js:87:13)
at emit (events.js:172:7)
at Socket.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/connection/connection.js:158:49)
at Socket.g (events.js:260:16)
at emitOne (events.js:77:13)
MongoError: failed to connect to server [localhost:27017] on first connect
at null.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/topologies/server.js:311:35)
at emitOne (events.js:77:13)
at emit (events.js:169:7)
at null.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/connection/pool.js:254:12)
at g (events.js:260:16)
at emitTwo (events.js:87:13)
at emit (events.js:172:7)
at Socket.<anonymous> (/usr/local/lib/node_modules/parse-server/node_modules/mongodb/node_modules/mongodb-core/lib/connection/connection.js:158:49)
at Socket.g (events.js:260:16)
at emitOne (events.js:77:13)
Sure could use some pointers !! thanks.

Answer 1

1) stop your server.
2) install mongodb
sudo apt-get install -y mongodb-org
3) test to make sure it is running
sudo apt-get install -y mongodb-org
A suitable response would be :
'mongod start/running, process 18777'
4) restart your server:
npm start
5) try creating the post again
curl -X POST -H "X-Parse-Application-Id: AppID123" -H "Content-Type: application/json" -d '{"score":1337,"playerName":"Sean Plott","cheatMode":false}' http://localhost:1337/parse/classes/GameScore
p.s. "localhost" should really be the address of your server.
for a more detailed explanation :
https://www.digitalocean.com/community/tutorials/how-to-install-mongodb-on-ubuntu-14-04