On my Mac,`brew services start mongodb-community@4.2` starts mongod process in unknown port

Working with Data Developer Tools
1 
~ brew services start mongodb-community@4.2             
==> Successfully started `mongodb-community@4.2` (label: homebrew.mxcl.mongodb-community@4.2)

It ran successful. But:

~ mongo                                                   
MongoDB shell version v4.2.21
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
2022-08-16T16:25:03.024-0500 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:353:17
@(connect):2:6
2022-08-16T16:25:03.029-0500 F  -        [main] exception: connect failed
2022-08-16T16:25:03.029-0500 E  -        [main] exiting with code 1

And

~ sudo lsof -i :27017

returned nothing.

So this concludes that mongod is running on some unknown PORT.

2

Share the configuration file and we might help.

Also share the output of

sudo ss -tlp

or

sudo netstat -tlp

The output of the following is also needed:

sudo ps -aef | grep [m]ongo
3

where do I find the configuration file?

4 
systemLog:
  destination: file
  path: /opt/homebrew/var/log/mongodb/mongo.log
  logAppend: true
storage:
  dbPath: /opt/homebrew/var/mongodb
net:
  bindIp: 127.0.0.1, ::1
  ipv6: true

This is what is in my /opt/homebrew/etc/mongod.conf file

5

ss is not a recognized command.

~ sudo netstat -tlp                 
netstat: option requires an argument -- p
Usage:	netstat [-AaLlnW] [-f address_family | -p protocol]
	netstat [-gilns] [-f address_family]
	netstat -i | -I interface [-w wait] [-abdgRtS]
	netstat -s [-s] [-f address_family | -p protocol] [-w wait]
	netstat -i | -I interface -s [-f address_family | -p protocol]
	netstat -m [-m]
	netstat -r [-Aaln] [-f address_family]
	netstat -rs [-s]

~ sudo ps -aef | grep mongo  
  501  4445   854   0  8:51AM ttys002    0:00.00 grep mongo
6

The ps output shows that mongod has not been started.

Share the log file.

7

where is the log file located?

8

It is specified in the configuration file you shared.

9

The file is too enormous:

2022-08-15T13:21:43.753-0500 I CONTROL [main] ***** SERVER RESTARTED *****
2022-08-15T13:21:43.759-0500 I CONTROL [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols ‘none’
2022-08-15T13:21:43.762-0500 W ASIO [main] No TransportLayer configured during NetworkInterface startup
2022-08-15T13:21:43.763-0500 I CONTROL [initandlisten] MongoDB starting : pid=85422 port=27017 dbpath=/opt/homebrew/var/mongodb 64-bit host=Junlues-MacBook-Pro.local
2022-08-15T13:21:43.763-0500 I CONTROL [initandlisten] db version v4.2.21
2022-08-15T13:21:43.763-0500 I CONTROL [initandlisten] git version: b0aeed9445ff41af07449fa757e1f231bce990b3
2022-08-15T13:21:43.763-0500 I CONTROL [initandlisten] allocator: system
2022-08-15T13:21:43.763-0500 I CONTROL [initandlisten] modules: none
2022-08-15T13:21:43.763-0500 I CONTROL [initandlisten] build environment:
2022-08-15T13:21:43.763-0500 I CONTROL [initandlisten] distarch: x86_64
2022-08-15T13:21:43.763-0500 I CONTROL [initandlisten] target_arch: x86_64
2022-08-15T13:21:43.763-0500 I CONTROL [initandlisten] machdep.cpu.extfeatures unavailable
2022-08-15T13:21:43.763-0500 I CONTROL [initandlisten] options: { config: “/opt/homebrew/etc/mongod.conf”, net: { bindIp: “127.0.0.1, ::1”, ipv6: true }, storage: { dbPath: “/opt/homebrew/var/mongodb” }, systemLog: { destination: “file”, logAppend: true, path: “/opt/homebrew/var/log/mongodb/mongo.log” } }
2022-08-15T13:21:43.764-0500 E STORAGE [initandlisten] Failed to set up listener: SocketException: Address already in use
2022-08-15T13:21:43.764-0500 I REPL [initandlisten] Stepping down the ReplicationCoordinator for shutdown, waitTime: 10000ms
2022-08-15T13:21:43.765-0500 I SHARDING [initandlisten] Shutting down the WaitForMajorityService
2022-08-15T13:21:43.765-0500 I NETWORK [initandlisten] Shutting down the global connection pool
2022-08-15T13:21:43.765-0500 I INDEX [initandlisten] Shutting down the IndexBuildsCoordinator
2022-08-15T13:21:43.765-0500 I NETWORK [initandlisten] Shutting down the ReplicaSetMonitor
2022-08-15T13:21:43.765-0500 I CONTROL [initandlisten] Shutting down free monitoring
2022-08-15T13:21:43.765-0500 I FTDC [initandlisten] Shutting down full-time data capture
2022-08-15T13:21:43.765-0500 I STORAGE [initandlisten] Shutting down the HealthLog
2022-08-15T13:21:43.765-0500 I - [initandlisten] Dropping the scope cache for shutdown
2022-08-15T13:21:43.765-0500 I CONTROL [initandlisten] now exiting
2022-08-15T13:21:43.765-0500 I CONTROL [initandlisten] shutting down with code:48

10

Means a process is already using the same address/port combination.

Share the output of

sudo netstat -l
brew services list
11 

~ brew services start mongodb-community@4.2          
==> Successfully started `mongodb-community@4.2` (label: homebrew.mxcl.mongodb-community@4.2)
~ brew services list                       
Name                  Status      User File
mongodb-community@4.2 error  3584 gani ~/Library/LaunchAgents/homebrew.mxcl.mongodb-community@4.2.plist
rabbitmq              started     gani ~/Library/LaunchAgents/homebrew.mxcl.rabbitmq.plist
redis                 started     gani ~/Library/LaunchAgents/homebrew.mxcl.redis.plist
12 
sudo netstat -l
Proto Recv-Q Send-Q  Local Address                                 Foreign Address                               (state)    
tcp4       0      0  10.0.0.183.49770                              ec2-54-92-199-18.https                        ESTABLISHED
tcp4      31      0  10.0.0.183.49769                              ec2-35-163-77-22.https                        CLOSE_WAIT 
tcp4       0      0  10.0.0.183.49765                              20.189.173.7.https                            ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49764   2001:558:feed:443::12.https                   ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49763   2606:4700:90:0:f22e:fbec:5bed:a9b9.https      ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49759   ord08s13-in-x03.1e100.net.https               ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49755   ord30s22-in-x05.1e100.net.https               ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49753   2001:558:feed:443::12.https                   ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49752   2600:9000:2350:fa00:8:4923:b2c0:21.https      ESTABLISHED
tcp4       0      0  10.0.0.183.49751                              server-65-8-55-1.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49749                              52.46.154.73.https                            ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49744   2a04:4e42:84::272.https                       ESTABLISHED
tcp4       0      0  10.0.0.183.49732                              160.35.184.35.bc.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49696                              ec2-54-217-83-24.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49695                              162.219.225.118.https                         ESTABLISHED
tcp4       0      0  10.0.0.183.49618                              ec2-54-145-94-22.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49617                              ec2-54-145-94-22.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49614                              ec2-54-147-76-65.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49600                              ec2-54-145-94-22.https                        ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49581   2a04:4e42:83::272.https                       ESTABLISHED
tcp4       0      0  10.0.0.183.49475                              stackoverflow.co.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49390                              stackoverflow.co.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49389                              ec2-54-175-191-2.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49385                              ec2-3-214-160-18.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49381                              ec2-34-227-4-145.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49377                              ec2-54-175-191-2.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49376                              stackoverflow.co.https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49364                              stackoverflow.co.https                        ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49359   2600:9000:2350:4400:7:7859:3840:93a1.https    ESTABLISHED
tcp4       0      0  10.0.0.183.49305                              104.192.142.18.https                          ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49301   2606:4700:90:0:f22e:fbec:5bed:a9b9.https      ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49274   ga-in-f188.1e100.net.5228                     ESTABLISHED
tcp4       0      0  localhost.epmd                                localhost.49271                               ESTABLISHED
tcp4       0      0  localhost.49271                               localhost.epmd                                ESTABLISHED
tcp4      24      0  10.0.0.183.49229                              static.59.20.181.https                        CLOSE_WAIT 
tcp4       0      0  10.0.0.183.49216                              ec2-3-225-113-73.https                        ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49201   2001:558:feed:443::12.https                   ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49197   2001:558:feed:443::12.https                   ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49196   2001:558:feed:443::12.https                   ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.49195   2001:558:feed:443::12.https                   ESTABLISHED
tcp4       0      0  10.0.0.183.49178                              ec2-3-215-27-40..https                        ESTABLISHED
tcp4       0      0  10.0.0.183.49152                              ec2-52-44-179-25.https                        ESTABLISHED
tcp4       0      0  localhost.epmd                                localhost.49771                               TIME_WAIT  
tcp4       0      0  localhost.49773                               localhost.epmd                                TIME_WAIT  
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.64362   2620:149:a42:903::e.443                       ESTABLISHED
tcp4       0      0  10.0.0.183.49279                              17.248.190.204.443                            ESTABLISHED
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.64361   2620:149:a42:903::e.443                       TIME_WAIT  
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.64360   2620:149:a42:903::e.443                       TIME_WAIT  
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.64359   2620:149:a42:903::e.443                       TIME_WAIT  
tcp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.63787   2603:1036:304:2853::2.443                     ESTABLISHED
tcp4       0      0  10.0.0.183.65454                              17.57.144.134.5223                            ESTABLISHED
udp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.61814   ord38s33-in-x0e.1e100.net.https                          
udp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.61608   ord37s08-in-x03.1e100.net.https                          
udp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.58947   ord38s29-in-x03.1e100.net.https                          
udp6       0      0  2601:241:8202:54b0:461:1336:75bf:e2af.62043   ord38s28-in-x0a.1e100.net.https                          
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*                                                      
udp4       0      0  *.*                                           *.*
13

To solve

Replace

with

logAppend: false

and then redo

Share the log file, we should get the real reason why it fails. The other error from the log you shared is from 2 days ago. Most likely you had another mongod running at that time.

14 
2022-08-17T10:55:27.046-0500 I  CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
2022-08-17T10:55:27.048-0500 W  ASIO     [main] No TransportLayer configured during NetworkInterface startup
2022-08-17T10:55:27.049-0500 I  CONTROL  [initandlisten] MongoDB starting : pid=30240 port=27017 dbpath=/opt/homebrew/var/mongodb 64-bit host=Junlues-MacBook-Pro.local
2022-08-17T10:55:27.049-0500 I  CONTROL  [initandlisten] db version v4.2.21
2022-08-17T10:55:27.049-0500 I  CONTROL  [initandlisten] git version: b0aeed9445ff41af07449fa757e1f231bce990b3
2022-08-17T10:55:27.049-0500 I  CONTROL  [initandlisten] allocator: system
2022-08-17T10:55:27.049-0500 I  CONTROL  [initandlisten] modules: none
2022-08-17T10:55:27.049-0500 I  CONTROL  [initandlisten] build environment:
2022-08-17T10:55:27.049-0500 I  CONTROL  [initandlisten]     distarch: x86_64
2022-08-17T10:55:27.049-0500 I  CONTROL  [initandlisten]     target_arch: x86_64
2022-08-17T10:55:27.049-0500 I  CONTROL  [initandlisten] machdep.cpu.extfeatures unavailable
2022-08-17T10:55:27.049-0500 I  CONTROL  [initandlisten] options: { config: "/opt/homebrew/etc/mongod.conf", net: { bindIp: "127.0.0.1, ::1", ipv6: true }, storage: { dbPath: "/opt/homebrew/var/mongodb" }, systemLog: { destination: "file", logAppend: false, path: "/opt/homebrew/var/log/mongodb/mongo.log" } }
2022-08-17T10:55:27.050-0500 I  STORAGE  [initandlisten] Detected data files in /opt/homebrew/var/mongodb created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.
2022-08-17T10:55:27.050-0500 I  STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=15872M,cache_overflow=(file_max=0M),session_max=33000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000,close_scan_interval=10,close_handle_minimum=250),statistics_log=(wait=0),verbose=[recovery_progress,checkpoint_progress],
2022-08-17T10:55:27.166-0500 E  STORAGE  [initandlisten] WiredTiger error (-31802) [1660751727:166653][30240:0x20969b600], connection: __log_open_verify, 925: unsupported WiredTiger file version: this build only supports versions up to 4, and the file is version 5: WT_ERROR: non-specific WiredTiger error Raw: [1660751727:166653][30240:0x20969b600], connection: __log_open_verify, 925: unsupported WiredTiger file version: this build only supports versions up to 4, and the file is version 5: WT_ERROR: non-specific WiredTiger error
2022-08-17T10:55:27.219-0500 E  STORAGE  [initandlisten] WiredTiger error (-31802) [1660751727:219207][30240:0x20969b600], connection: __log_open_verify, 925: unsupported WiredTiger file version: this build only supports versions up to 4, and the file is version 5: WT_ERROR: non-specific WiredTiger error Raw: [1660751727:219207][30240:0x20969b600], connection: __log_open_verify, 925: unsupported WiredTiger file version: this build only supports versions up to 4, and the file is version 5: WT_ERROR: non-specific WiredTiger error
2022-08-17T10:55:27.243-0500 E  STORAGE  [initandlisten] WiredTiger error (-31802) [1660751727:243834][30240:0x20969b600], connection: __log_open_verify, 925: unsupported WiredTiger file version: this build only supports versions up to 4, and the file is version 5: WT_ERROR: non-specific WiredTiger error Raw: [1660751727:243834][30240:0x20969b600], connection: __log_open_verify, 925: unsupported WiredTiger file version: this build only supports versions up to 4, and the file is version 5: WT_ERROR: non-specific WiredTiger error
2022-08-17T10:55:27.278-0500 E  STORAGE  [initandlisten] WiredTiger error (-31802) [1660751727:278461][30240:0x20969b600], connection: __log_open_verify, 925: unsupported WiredTiger file version: this build only supports versions up to 4, and the file is version 5: WT_ERROR: non-specific WiredTiger error Raw: [1660751727:278461][30240:0x20969b600], connection: __log_open_verify, 925: unsupported WiredTiger file version: this build only supports versions up to 4, and the file is version 5: WT_ERROR: non-specific WiredTiger error
2022-08-17T10:55:27.315-0500 E  STORAGE  [initandlisten] WiredTiger error (-31802) [1660751727:315348][30240:0x20969b600], connection: __log_open_verify, 925: unsupported WiredTiger file version: this build only supports versions up to 4, and the file is version 5: WT_ERROR: non-specific WiredTiger error Raw: [1660751727:315348][30240:0x20969b600], connection: __log_open_verify, 925: unsupported WiredTiger file version: this build only supports versions up to 4, and the file is version 5: WT_ERROR: non-specific WiredTiger error
2022-08-17T10:55:27.337-0500 W  STORAGE  [initandlisten] Failed to start up WiredTiger under any compatibility version.
2022-08-17T10:55:27.337-0500 F  STORAGE  [initandlisten] Reason: -31802: WT_ERROR: non-specific WiredTiger error
2022-08-17T10:55:27.337-0500 F  -        [initandlisten] Fatal Assertion 28595 at src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp 928
2022-08-17T10:55:27.337-0500 F  -        [initandlisten] \n\n***aborting after fassert() failure\n\n
15

It looks like you had a more recent version of mongod using the same data directory.

I see 3 ways out:

1 - If the data that is there IS IMPORTANT, install and run a 5.x version rather than 4.2

or

2 - If the data that is there IS IMPORTANT and you MUST run 4.2,

  • make a backup of the data directory for later retrieval
  • create a new directory /opt/homebrew/var/mongodb-4.2
  • change the configuration file to reflect the new dbPath

or

3 - If the data that is there IS NOT IMPORTANT and you must run 4.2

  • make a backup of the data directory for later retrieval just in case the data is more important than you thought
  • rename /opt/homebrew/var/mongodb to /opt/homebrew/var/mongodb-5.x
  • creaet a new directory /opt/homebrew/var/mongodb/
2 Likes
16

I chose solution 3 and it worked.

But I am not sure what you mean by data directory

1 Like
17

It means the directory where mongod store the data. In your case:

18

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