Node.js Mongoose无法连接到本地主机：MongoError:无法连接到服务器[127.0.0.1:27017]

我正在处理从Github下载的回购协议，我知道js代码很好

我有一个配置文件，将db URL指向“mongodb://127.0.0.1:27017/messenger". （我还没有创建数据库）

我在Heroku上有节点应用程序，但是每次在mongodb connect上Heroku日志都会失败

2016-12-02T06:23:31.636339+00:00 app[web.1]: mongodb://127.0.0.1:27017/messenger
2016-12-02T06:23:31.672354+00:00 app[web.1]: CALLBACK URL IS
2016-12-02T06:23:31.672434+00:00 app[web.1]: https://cool-scrubland-89690.herokuapp.com/messages/receive/
2016-12-02T06:23:31.683394+00:00 app[web.1]: students
2016-12-02T06:23:31.701863+00:00 app[web.1]: listening on port 3124
2016-12-02T06:23:31.702052+00:00 app[web.1]: Application running at port 48594
2016-12-02T06:23:31.717752+00:00 app[web.1]: 
2016-12-02T06:23:31.717764+00:00 app[web.1]: /app/node_modules/mongoose/node_modules/mongodb/lib/server.js:261
2016-12-02T06:23:31.717766+00:00 app[web.1]:         process.nextTick(function() { throw err; })
2016-12-02T06:23:31.717767+00:00 app[web.1]:                                       ^
2016-12-02T06:23:31.718744+00:00 app[web.1]: MongoError: failed to connect to server [127.0.0.1:27017] on first connect
2016-12-02T06:23:31.718746+00:00 app[web.1]:     at Pool.<anonymous> (/app/node_modules/mongoose/node_modules/mongodb-core/lib/topologies/server.js:313:35)
2016-12-02T06:23:31.718747+00:00 app[web.1]:     at emitOne (events.js:96:13)
2016-12-02T06:23:31.718747+00:00 app[web.1]:     at Pool.emit (events.js:188:7)
2016-12-02T06:23:31.718748+00:00 app[web.1]:     at Connection.<anonymous> (/app/node_modules/mongoose/node_modules/mongodb-core/lib/connection/pool.js:271:12)
2016-12-02T06:23:31.718749+00:00 app[web.1]:     at Connection.g (events.js:291:16)
2016-12-02T06:23:31.718750+00:00 app[web.1]:     at emitTwo (events.js:106:13)
2016-12-02T06:23:31.718750+00:00 app[web.1]:     at Connection.emit (events.js:191:7)
2016-12-02T06:23:31.718751+00:00 app[web.1]:     at Socket.<anonymous> (/app/node_modules/mongoose/node_modules/mongodb-core/lib/connection/connection.js:165:49)
2016-12-02T06:23:31.718752+00:00 app[web.1]:     at Socket.g (events.js:291:16)
2016-12-02T06:23:31.718752+00:00 app[web.1]:     at emitOne (events.js:96:13)
2016-12-02T06:23:31.718753+00:00 app[web.1]:     at Socket.emit (events.js:188:7)
2016-12-02T06:23:31.718754+00:00 app[web.1]:     at emitErrorNT (net.js:1276:8)
2016-12-02T06:23:31.718754+00:00 app[web.1]:     at _combinedTickCallback (internal/process/next_tick.js:74:11)
2016-12-02T06:23:31.718755+00:00 app[web.1]:     at process._tickCallback (internal/process/next_tick.js:98:9)
2016-12-02T06:24:24.832476+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch
2016-12-02T06:24:24.832543+00:00 heroku[web.1]: Stopping process with SIGKILL
2016-12-02T06:24:24.958931+00:00 heroku[web.1]: State changed from starting to crashed
2016-12-02T06:24:24.949820+00:00 heroku[web.1]: Process exited with status 137

这个问题可能与猫鼬有关

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有人能帮我吗

在您的mongoose connect呼叫中，您没有精确到mongodb://：

mongoose.connect("localhost:27017/mydbname");

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查看是否存在旧的锁文件（如果存在），然后通过 sudorm/var/lib/mongodb/mongod.lock看看这是否适合您

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sudo mongod——修复和（sudo start mongodb或sudo service mongodb start）

我在没有

mongodb://

的情况下尝试过，但没有结果。谢谢你！仍处于困境显示代码，并打印以下命令的输出：sudo netstat-atunlp | grep“27017”终端表示sudo netstat-atunlp | grep“27017”命令不存在（我也尝试过使用

tunlp

和

a tunlp

，但没有结果。我的代码在repo中，我有一个配置文件，它指向db URL`“dbURL”：“localhost:27017/messenger”}`如果没有找到命令，请尝试netstat安装netstat，（对于debian版本的sudo apt get install netstat）netstat提供“活动internet连接”和数百个地址。未参考端口27017

mongoose.connect("localhost:27017/mydbname");