Problem using and running brew services start [email protected]

Question

I have MacOs Catalina version 10.15.5 and I installed mongoDB following the steps indicated at their site https://docs.mongodb.com/manual/tutorial/install-mongodb-on-os-x/ using Homebrew. When I check my mongoDB if its correctly installed I use which mongo command and I get /usr/local/bin/mongo response. When I use mongo --version and mongod --version I get:

MongoDB shell version v4.2.7
git version: 51d9fe12b5d19720e72dcd7db0f2f17dd9a19212
allocator: system
modules: none
build environment:
    distarch: x86_64
    target_arch: x86_64

and

db version v4.2.7
git version: 51d9fe12b5d19720e72dcd7db0f2f17dd9a19212
allocator: system
modules: none
build environment:
    distarch: x86_64
    target_arch: x86_64

respectevely which I think it means its correctly installed and should work.

But when I open terminal and run the command brew services start [email protected] as indicated on the site I get:

Error: undefined method `resolve_alias' for Formula:Class
/usr/local/bin/brew-services.rb:154:in `service'
/usr/local/bin/brew-services.rb:203:in `check'
/usr/local/bin/brew-services.rb:193:in `run!'
/usr/local/bin/brew-services.rb:397:in `<top (required)>'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/usr/local/Homebrew/Library/Homebrew/utils.rb:81:in `require?'
/usr/local/Homebrew/Library/Homebrew/brew.rb:112:in `<main>'

NOTE: my brew is updated and upgraded successfully!

I searched on the internet any solution but I cant find anything that solves the problem... If anyone had faced similar problem please explain step by step and with details how you had solved it?!?!

If I directly run command mongod I get:

2020-06-04T01:19:41.351+0200 I  CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
2020-06-04T01:19:41.355+0200 W  ASIO     [main] No TransportLayer configured during NetworkInterface startup
2020-06-04T01:19:41.355+0200 I  CONTROL  [initandlisten] MongoDB starting : pid=24712 port=27017 dbpath=/data/db 64-bit host=Air-de-Ruslan.home
2020-06-04T01:19:41.355+0200 I  CONTROL  [initandlisten] db version v4.2.7
2020-06-04T01:19:41.355+0200 I  CONTROL  [initandlisten] git version: 51d9fe12b5d19720e72dcd7db0f2f17dd9a19212
2020-06-04T01:19:41.355+0200 I  CONTROL  [initandlisten] allocator: system
2020-06-04T01:19:41.355+0200 I  CONTROL  [initandlisten] modules: none
2020-06-04T01:19:41.355+0200 I  CONTROL  [initandlisten] build environment:
2020-06-04T01:19:41.355+0200 I  CONTROL  [initandlisten]     distarch: x86_64
2020-06-04T01:19:41.355+0200 I  CONTROL  [initandlisten]     target_arch: x86_64
2020-06-04T01:19:41.355+0200 I  CONTROL  [initandlisten] options: {}
2020-06-04T01:19:41.355+0200 E  NETWORK  [initandlisten] Failed to unlink socket file /tmp/mongodb-27017.sock Permission denied
2020-06-04T01:19:41.355+0200 F  -        [initandlisten] Fatal Assertion 40486 at src/mongo/transport/transport_layer_asio.cpp 684
2020-06-04T01:19:41.355+0200 F  -        [initandlisten] 

***aborting after fassert() failure

and if I run directly command mongo I get:

MongoDB shell version v4.2.7
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
2020-06-04T01:21:20.317+0200 E  QUERY    [js] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed: SocketException: Error connecting to 127.0.0.1:27017 :: caused by :: Connection refused :
connect@src/mongo/shell/mongo.js:341:17
@(connect):2:6
2020-06-04T01:21:20.320+0200 F  -        [main] exception: connect failed
2020-06-04T01:21:20.320+0200 E  -        [main] exiting with code 1

Answer 1

SOLVED

I had to remove /usr/local/bin/brew-services.rb with the command

rm /usr/local/bin/brew-services.rb it could ask for permissions so add sudo rm /usr/local/bin/brew-services.rb.

After that I tried running brew services start [email protected] and I got

Successfully started mongodb-community (label: homebrew.mxcl.mongodb-commu but when I put mongo from different terminal to start the shell I got Socket exception errorso I checked also the mongod.log file and I saw it was a socket issue so I tried

ls -ls /tmp/mongodb-27017.sock and I got

0 srwx------ 1 root root 0 June 04 14:51 /tmp/mongodb-27017.sock that means the owner is root and mongodb cant access it so I did

sudo rm -rf /tmp/mongodb-27017.sock

to delete the file and then start again mongodb with

brew services start [email protected] that created new .sock file whose owner is directly mongodb or the actual user whoami and when I checked again

ls -lsah /tmp/mongodb-27017.sock

I proved I am the owner and then I could open new terminal and run mongo and get in with enabled connection and use the shell!

Answer 2

Tested on macos Big Sur and [email protected]

If you're using homebrew and upgraded to [email protected], you may encounter with error when starting the mongodb-community service.

Use rm -rf /usr/local/var/mongodb to remove previous dbpath folder if exists then create it again using cd /usr/local/var && mkdir mongodb.

Then brew services start mongodb-community should work fine.