How to fix connection timeout problem with MongoDB

Some of us have encountered a problem problem right after installing MongoDB, turns out we can’t connect. I personally get this: root@ghost:~# mongo MongoDB shell version v4.2.8 connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb 2020-10-30T12:10:51.955+0100 E QUERY [js] Error: couldn’t connect to server 127.0.0.1:27017, connection attempt fa iled: SocketException: Error connecting to 127.0.0.1:27017 :: caused by :: Connection timed out : connect@src/mongo/shell/mongo.js:341:17 @(connect):2:6 2020-10-30T12:10:51.958+0100 …

How to locally configure a replica set in MongoDB

This post will guide you through the steps to set up a local replica set with two members and one arbiter. In a production environment the steps must be almost the same except that instead of starting three local MongoDB instances in different ports you would start an instance of MongoDB on each server with its own configuration file. This …

How to remove documents from a capped collection in MongoDB

You can’t remove one or all documents from a capped collection in MongoDB. BUT! you can drop the collection! Execute the following command: db.getCollection(‘myCollection’).drop() The result for me is: true There you go, quick and easy. Sources https://docs.mongodb.com/manual/core/capped-collections/ https://stackoverflow.com/questions/33048282/how-to-remove-a-document-from-the-capped-collection

How to count documents of a collection in MongoDB

Today, I had to do this at work. turns out it is very easy. I am using Robomongo 1.0-RC1. I just double click on the collection that I want, in this case knives and I just execute the following query: db.getCollection(‘knives’).count() The result in my case is: 1911 Hope it helps! Sources https://docs.mongodb.com/manual/reference/method/db.collection.count/