我的网络应用程序一直在heroku崩溃，我不知道原因。下面是崩溃日志。我认为这是redis的一个问题，但不知道为什么，因为我为heroku设置了redis附加组件，但app仍在崩溃。
2016-05-04T04:02:50.932588+00:00 app[web.1]: > justinwalker@1.0.0 start /app
2016-05-04T04:02:50.932476+00:00 app[web.1]:
2016-05-04T04:02:50.932592+00:00 app[web.1]: > node server.js
2016-05-04T04:02:50.932593+00:00 app[web.1]:
2016-05-04T04:02:53.119406+00:00 app[web.1]: Wed, 04 May 2016 04:02:53 GMT express-session deprecated undefined resave option; provide resave option at server.js:69:2
2016-05-04T04:02:53.120506+00:00 app[web.1]: Wed, 04 May 2016 04:02:53 GMT express-session deprecated undefined saveUninitialized option; provide saveUninitialized option at server.js:69:2
2016-05-04T04:02:53.188481+00:00 app[web.1]: express is listening on port 80
2016-05-04T04:02:53.206209+00:00 app[web.1]: events.js:154
2016-05-04T04:02:53.206227+00:00 app[web.1]: throw er; // Unhandled 'error' event
2016-05-04T04:02:53.206229+00:00 app[web.1]: ^
2016-05-04T04:02:53.206229+00:00 app[web.1]:
2016-05-04T04:02:53.206231+00:00 app[web.1]: Error: Redis connection to 127.0.0.1:6379 failed - connect ECONNREFUSED 127.0.0.1:6379
2016-05-04T04:02:53.206232+00:00 app[web.1]: at Object.exports._errnoException (util.js:893:11)
2016-05-04T04:02:53.206232+00:00 app[web.1]: at exports._exceptionWithHostPort (util.js:916:20)
2016-05-04T04:02:53.206233+00:00 app[web.1]: at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1075:14)
2016-05-04T04:02:53.235064+00:00 app[web.1]:
2016-05-04T04:02:53.248722+00:00 app[web.1]: npm ERR! Linux 3.13.0-79-generic
2016-05-04T04:02:53.249205+00:00 app[web.1]: npm ERR! argv "/app/.heroku/node/bin/node" "/app/.heroku/node/bin/npm" "start"
2016-05-04T04:02:53.249498+00:00 app[web.1]: npm ERR! node v5.11.0
2016-05-04T04:02:53.264050+00:00 app[web.1]: npm ERR! npm v3.8.6
2016-05-04T04:02:53.264250+00:00 app[web.1]: npm ERR! code ELIFECYCLE
2016-05-04T04:02:53.264431+00:00 app[web.1]: npm ERR! justinwalker@1.0.0 start: `node server.js`
2016-05-04T04:02:53.264590+00:00 app[web.1]: npm ERR! Exit status 1
2016-05-04T04:02:53.264765+00:00 app[web.1]: npm ERR!
2016-05-04T04:02:53.264928+00:00 app[web.1]: npm ERR! Failed at the justinwalker@1.0.0 start script 'node server.js'.
2016-05-04T04:02:53.265088+00:00 app[web.1]: npm ERR! Make sure you have the latest version of node.js and npm installed.
2016-05-04T04:02:53.265235+00:00 app[web.1]: npm ERR! If you do, this is most likely a problem with the justinwalker package,
2016-05-04T04:02:53.265383+00:00 app[web.1]: npm ERR! not with npm itself.
2016-05-04T04:02:53.265526+00:00 app[web.1]: npm ERR! Tell the author that this fails on your system:
2016-05-04T04:02:53.265699+00:00 app[web.1]: npm ERR! node server.js
2016-05-04T04:02:53.265875+00:00 app[web.1]: npm ERR! You can get information on how to open an issue for this project with:
2016-05-04T04:02:53.265993+00:00 app[web.1]: npm ERR! npm bugs justinwalker
2016-05-04T04:02:53.266128+00:00 app[web.1]: npm ERR! Or if that isn't available, you can get their info via:
2016-05-04T04:02:53.266294+00:00 app[web.1]: npm ERR! npm owner ls justinwalker
2016-05-04T04:02:53.266473+00:00 app[web.1]: npm ERR! There is likely additional logging output above.
2016-05-04T04:02:53.271506+00:00 app[web.1]:
2016-05-04T04:02:53.271794+00:00 app[web.1]: npm ERR! Please include the following file with any support request:
2016-05-04T04:02:53.271995+00:00 app[web.1]: npm ERR! /app/npm-debug.log
2016-05-04T04:02:54.463336+00:00 heroku[web.1]: Process exited with status 1
2016-05-04T04:02:54.477765+00:00 heroku[web.1]: State changed from starting to crashed