I am trying to connect with mongodb database but it throws some kind of error I am unable to understand

[Aman Kr Sharma]

I am trying to connect with mongodb database but it throws some kind of error I am unable to understand

(node:94165) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.

(Use `node --trace-deprecation ...` to show where the warning was created)

MongoNetworkError: failed to connect to server [cluster0-shard-00-00.lpcoo.mongodb.net:27017] on first connect [MongoNetworkError: connection 5 to cluster0-shard-00-00.lpcoo.mongodb.net:27017 closed

    at TLSSocket.<anonymous> (/home/aman/Documents/Coding/nodejs/expressjs_ejs_mongodb/node_modules/mongodb/lib/core/connection/connection.js:372:9)

    at Object.onceWrapper (events.js:422:26)

    at TLSSocket.emit (events.js:315:20)

    at net.js:670:12

    at TCP.done (_tls_wrap.js:554:7)]

    at Pool.<anonymous> (/home/aman/Documents/Coding/nodejs/expressjs_ejs_mongodb/node_modules/mongodb/lib/core/topologies/server.js:438:11)

    at Pool.emit (events.js:315:20)

    at /home/aman/Documents/Coding/nodejs/expressjs_ejs_mongodb/node_modules/mongodb/lib/core/connection/pool.js:562:14

    at /home/aman/Documents/Coding/nodejs/expressjs_ejs_mongodb/node_modules/mongodb/lib/core/connection/pool.js:1009:9

    at callback (/home/aman/Documents/Coding/nodejs/expressjs_ejs_mongodb/node_modules/mongodb/lib/core/connection/connect.js:97:5)

    at /home/aman/Documents/Coding/nodejs/expressjs_ejs_mongodb/node_modules/mongodb/lib/core/connection/connect.js:124:7

    at _callback (/home/aman/Documents/Coding/nodejs/expressjs_ejs_mongodb/node_modules/mongodb/lib/core/connection/connect.js:349:5)

    at Connection.errorHandler (/home/aman/Documents/Coding/nodejs/expressjs_ejs_mongodb/node_modules/mongodb/lib/core/connection/connect.js:365:5)

    at Object.onceWrapper (events.js:422:26)

    at Connection.emit (events.js:315:20)

[Rahul Deewan]

Hi,

I think MongoDb installed on your system is not running. Please run that first and then try to execute the program.

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Rahul Deewan

[Zlatko]

Hi there,

On Sunday, July 26, 2020 at 2:09:29 AM UTC+2, Aman Kr Sharma wrote:

(node:94165) DeprecationWarning: current Server Discovery and Monitoring engine is deprecated, and will be removed in a future version. To use the new Server Discover and Monitoring engine, pass option { useUnifiedTopology: true } to the MongoClient constructor.

(Use `node --trace-deprecation ...` to show where the warning was created)

MongoNetworkError: failed to connect to server [cluster0-shard-00-00.lpcoo.mongodb.net:27017] on first connect [MongoNetworkError: connection 5 to cluster0-shard-00-00.lpcoo.mongodb.net:27017 closed

What is your exact connection string? If you just pass "cluster0-shard-00-00.lpcoo.mongodb.net:27017", try adding `mongodb://` before it. But MongoNetworkError seems to indicate that your _server_ is either down or unreachable. Can you reach it from another MongoDB client? Is the error only in your app?

[Choo Tze Sien]

mongoose.connect( *Connection URL to Database here*, { useNewUrlParser: true, useCreateIndex: true, useFindAndModify: false, useUnifiedTopology:true })

Hi! Aman, I met the problem while starting to explore mongoDB as well. Hope this solves the problem!

[Sanjay Sharma]