我发现当我在我的计算机上使用MongoLab后端在我的计算机上运行我的节点应用程序时，它工作得很好，但遗憾的是在使用Git将项目推送到Heroku服务器之后，后端似乎无法执行服务器。这是我在输入heroku logs
2014-08-15T02:50:59.646594+00:00 app[web.1]: ^
2014-08-15T02:50:59.648767+00:00 app[web.1]: at Object.Module._extensions..js (module.js:474:10)
2014-08-15T02:50:59.648760+00:00 app[web.1]: at Module.require (module.js:364:17)
2014-08-15T02:50:59.648770+00:00 app[web.1]: at Function.Module._load (module.js:312:12)
2014-08-15T02:50:59.648758+00:00 app[web.1]: at Function.Module._load (module.js:280:25)
2014-08-15T02:50:59.648766+00:00 app[web.1]: at Module._compile (module.js:456:26)
2014-08-15T02:50:59.648769+00:00 app[web.1]: at Module.load (module.js:356:32)
2014-08-15T02:50:59.648762+00:00 app[web.1]: at require (module.js:380:17)
2014-08-15T02:51:01.523808+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=teenword.
herokuapp.com request_id=baaae02b-22f3-48f3-94dc-9c272b78d1a5 fwd="184.73.33.68" dyno= connect= service= status=503 byte
s=
2014-08-15T02:50:56+00:00 heroku[slug-compiler]: Slug compilation finished
2014-08-15T02:53:14.064750+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/login" host=teen
word.herokuapp.com request_id=eff2ca9e-c4d4-4ac7-9475-b8034ed8d43b fwd="31.13.157.69" dyno= connect= service= status=503
bytes=
2014-08-15T02:56:37.094873+00:00 heroku[api]: Scale to web=1 by peter.soboyejo@aol.com
2014-08-15T02:59:00.813302+00:00 app[web.1]:
2014-08-15T02:59:00.814146+00:00 app[web.1]: throw err;
2014-08-15T02:59:00.814328+00:00 app[web.1]: ^
2014-08-15T02:59:00.817013+00:00 app[web.1]: Error: Cannot find module 'merge-descriptors'
2014-08-15T02:59:00.817016+00:00 app[web.1]: at Function.Module._resolveFilename (module.js:338:15)
2014-08-15T02:59:00.817018+00:00 app[web.1]: at Function.Module._load (module.js:280:25)
2014-08-15T02:59:00.817019+00:00 app[web.1]: at Module.require (module.js:364:17)
2014-08-15T02:59:00.817021+00:00 app[web.1]: at require (module.js:380:17)
2014-08-15T02:59:00.817022+00:00 app[web.1]: at Object.<anonymous> (/app/node_modules/express/lib/express.js:5:13)
2014-08-15T02:59:00.817023+00:00 app[web.1]: at Module._compile (module.js:456:26)
2014-08-15T02:59:00.817025+00:00 app[web.1]: at Object.Module._extensions..js (module.js:474:10)
2014-08-15T02:59:00.817026+00:00 app[web.1]: at Module.load (module.js:356:32)
2014-08-15T02:59:00.817027+00:00 app[web.1]: at Function.Module._load (module.js:312:12)
2014-08-15T02:59:00.817029+00:00 app[web.1]: at Module.require (module.js:364:17)
2014-08-15T02:59:00.813688+00:00 app[web.1]: module.js:340
2014-08-15T02:59:01.814561+00:00 heroku[web.1]: State changed from starting to crashed
2014-08-15T03:00:16.967002+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=teenword.
herokuapp.com request_id=b403ea1c-65fd-4198-a691-7ebd688db707 fwd="199.231.242.26" dyno= connect= service= status=503 by
tes=
2014-08-15T03:02:03+00:00 heroku[slug-compiler]: Slug compilation started
2014-08-15T03:02:31.673064+00:00 app[web.1]:
2014-08-15T03:02:31.680188+00:00 app[web.1]: throw err;
2014-08-15T03:02:31.680198+00:00 app[web.1]: ^
2014-08-15T03:02:31.693110+00:00 app[web.1]: Error: Cannot find module 'merge-descriptors'
2014-08-15T03:02:31.693116+00:00 app[web.1]: at Function.Module._resolveFilename (module.js:338:15)
2014-08-15T03:02:31.693118+00:00 app[web.1]: at Function.Module._load (module.js:280:25)
2014-08-15T03:02:31.693119+00:00 app[web.1]: at Module.require (module.js:364:17)
2014-08-15T03:02:31.693122+00:00 app[web.1]: at require (module.js:380:17)
2014-08-15T03:02:31.693123+00:00 app[web.1]: at Object.<anonymous> (/app/node_modules/express/lib/express.js:5:13)
2014-08-15T03:02:31.693125+00:00 app[web.1]: at Module._compile (module.js:456:26)
2014-08-15T03:02:31.693126+00:00 app[web.1]: at Object.Module._extensions..js (module.js:474:10)
2014-08-15T03:02:31.693128+00:00 app[web.1]: at Module.load (module.js:356:32)
2014-08-15T03:02:31.693129+00:00 app[web.1]: at Function.Module._load (module.js:312:12)
2014-08-15T03:02:31.693131+00:00 app[web.1]: at Module.require (module.js:364:17)
2014-08-15T03:02:28+00:00 heroku[slug-compiler]: Slug compilation finished
2014-08-15T03:02:31.679640+00:00 app[web.1]: module.js:340
2014-08-15T03:02:33.235216+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=teenword.
herokuapp.com request_id=92321ac0-1ee9-4dda-a782-580107c89ff7 fwd="184.73.33.68" dyno= connect= service= status=503 byte
s=
2014-08-15T03:05:39+00:00 heroku[slug-compiler]: Slug compilation started
2014-08-15T03:05:57+00:00 heroku[slug-compiler]: Slug compilation finished
2014-08-15T03:05:58.051436+00:00 heroku[web.1]: State changed from crashed to starting
2014-08-15T03:06:01.982628+00:00 heroku[web.1]: State changed from starting to crashed
2014-08-15T03:06:00.100160+00:00 heroku[web.1]: Starting process with command `node server.js`
2014-08-15T03:06:01.974783+00:00 heroku[web.1]: Process exited with status 8
2014-08-15T03:07:37.569248+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/login" host=teen
word.herokuapp.com request_id=4327c523-1ca7-49f5-8c64-b4a52b7f57b7 fwd="31.13.157.69" dyno= connect= service= status=503
bytes=
2014-08-15T03:08:51.801138+00:00 heroku[api]: Scale to web=1 by peter.soboyejo@aol.com
2014-08-15T03:11:36.779299+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/signup" host=tee
nword.herokuapp.com request_id=4dc53622-d8ea-40ad-9bbf-f1eb3954e9a6 fwd="24.14.146.249" dyno= connect= service= status=5
03 bytes=
2014-08-15T03:22:55+00:00 heroku[slug-compiler]: Slug compilation started
2014-08-15T03:23:11.884248+00:00 app[web.1]:
2014-08-15T03:23:16.902395+00:00 app[web.1]: module.js:340
2014-08-15T03:23:11.884725+00:00 app[web.1]: module.js:340
2014-08-15T03:23:11.884916+00:00 app[web.1]: throw err;
2014-08-15T03:23:11.884927+00:00 app[web.1]: ^
2014-08-15T03:23:11.887410+00:00 app[web.1]: Error: Cannot find module 'merge-descriptors'
2014-08-15T03:23:11.887417+00:00 app[web.1]: at Function.Module._resolveFilename (module.js:338:15)
2014-08-15T03:23:11.887419+00:00 app[web.1]: at Function.Module._load (module.js:280:25)
2014-08-15T03:23:11.887421+00:00 app[web.1]: at Module.require (module.js:364:17)
2014-08-15T03:23:11.887424+00:00 app[web.1]: at require (module.js:380:17)
2014-08-15T03:23:11.887427+00:00 app[web.1]: at Object.<anonymous> (/app/node_modules/express/lib/express.js:5:13)
2014-08-15T03:23:11.887429+00:00 app[web.1]: at Module._compile (module.js:456:26)
2014-08-15T03:23:11.887431+00:00 app[web.1]: at Object.Module._extensions..js (module.js:474:10)
2014-08-15T03:23:11.887433+00:00 app[web.1]: at Module.load (module.js:356:32)
2014-08-15T03:23:11.887435+00:00 app[web.1]: at Function.Module._load (module.js:312:12)
2014-08-15T03:23:11.887437+00:00 app[web.1]: at Module.require (module.js:364:17)
2014-08-15T03:23:16.901816+00:00 app[web.1]:
2014-08-15T03:23:16.902692+00:00 app[web.1]: throw err;
2014-08-15T03:23:16.902698+00:00 app[web.1]: ^
2014-08-15T03:23:16.904869+00:00 app[web.1]: Error: Cannot find module 'merge-descriptors'
2014-08-15T03:23:16.904872+00:00 app[web.1]: at Function.Module._resolveFilename (module.js:338:15)
2014-08-15T03:23:16.904873+00:00 app[web.1]: at Function.Module._load (module.js:280:25)
2014-08-15T03:23:16.904875+00:00 app[web.1]: at Module.require (module.js:364:17)
2014-08-15T03:23:16.904877+00:00 app[web.1]: at require (module.js:380:17)
2014-08-15T03:23:16.904879+00:00 app[web.1]: at Object.<anonymous> (/app/node_modules/express/lib/express.js:5:13)
2014-08-15T03:23:16.904881+00:00 app[web.1]: at Module._compile (module.js:456:26)
2014-08-15T03:23:16.904883+00:00 app[web.1]: at Object.Module._extensions..js (module.js:474:10)
2014-08-15T03:23:16.904884+00:00 app[web.1]: at Module.load (module.js:356:32)
2014-08-15T03:23:16.904886+00:00 app[web.1]: at Function.Module._load (module.js:312:12)
2014-08-15T03:23:16.904887+00:00 app[web.1]: at Module.require (module.js:364:17)
2014-08-15T03:23:08.660195+00:00 heroku[api]: Deploy b60ead0 by peter.soboyejo@aol.com
2014-08-15T03:23:18.679853+00:00 heroku[web.1]: Process exited with status 8
2014-08-15T03:23:08.660396+00:00 heroku[api]: Release v14 created by peter.soboyejo@aol.com
2014-08-15T03:23:29.486685+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/login" host=teen
word.herokuapp.com request_id=bc8ed6e0-58cc-4aa6-9c07-0a764f35c40b fwd="31.13.157.69" dyno= connect= service= status=503
bytes=
2014-08-15T03:23:28.867038+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/login" host=teen
word.herokuapp.com request_id=6533a904-6f1c-4cf9-a5ae-d1f1adb0d85e fwd="31.13.157.69" dyno= connect= service= status=503
bytes=
2014-08-15T03:23:15.635910+00:00 heroku[web.1]: Starting process with command `node server.js`
2014-08-15T03:23:08+00:00 heroku[slug-compiler]: Slug compilation finished
2014-08-15T03:26:52+00:00 heroku[slug-compiler]: Slug compilation started
2014-08-15T03:27:06+00:00 heroku[slug-compiler]: Slug compilation finished
2014-08-15T03:27:10.320448+00:00 app[web.1]: module.js:340
2014-08-15T03:27:02.446174+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" hos
t=teenword.herokuapp.com request_id=6331dbf1-aa2f-4fea-b7ed-3703705e309a fwd="50.89.215.155" dyno= connect= service= sta
tus=503 bytes=
2014-08-15T03:27:09.170120+00:00 heroku[web.1]: Starting process with command `node server.js`
2014-08-15T03:27:11.651208+00:00 heroku[web.1]: Process exited with status 8
2014-08-15T03:27:17.338857+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=teenword.
herokuapp.com request_id=86b8be74-cf19-4977-bc1b-114b383aaad9 fwd="31.13.157.69" dyno= connect= service= status=503 byte
s=