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

Aman Kr Sharma

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Jul 25, 2020, 8:09:29 PM7/25/20

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(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

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Jul 27, 2020, 10:24:19 AM7/27/20

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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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Choo Tze Sien

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Jul 27, 2020, 10:24:19 AM7/27/20

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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!

Zlatko

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Jul 27, 2020, 10:24:19 AM7/27/20

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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?

Sanjay Sharma

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Jul 27, 2020, 10:24:19 AM7/27/20

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