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DHCP Discovery in Mac Fing Desktop app hangs indefinitely



I am experiencing an issue with the premium desktop Fing app (2.0.0) running on my MacOS (10.15.5) when attempting to perform a DHCP discovery test. The test begins, makes it through its test progress bar, but then it hangs on the "collecting final DHCP info" screen indefinitely. I have tried it 3-4 times and I have let it run as long as an hour before killing it. I have rebooted my mac to confirm it is not a long uptime glitch.
I do not have any problems with performing the same steps in Windows 10 with the Fing desktop app. I get results in a couple of minutes on Windows.
I can confirm that my mac is completely patched and that every permission the Fing app asked for has a checkmark beside it in my security settings, so it is allowed. I do not have problems running any of the other features of the Fing desktop app. Other Fing desktop tools like "find open ports" and "DNS Lookup" also work without incident.


I do not have any problems with performing the same steps in Windows 10 with the Fing desktop app. I get results in a couple of minutes on Windows.
I can confirm that my mac is completely patched and that every permission the Fing app asked for has a checkmark beside it in my security settings, so it is allowed. I do not have problems running any of the other features of the Fing desktop app. Other Fing desktop tools like "find open ports" and "DNS Lookup" also work without incident.


1
Answers
Thanks for your post. To address your query, Can you please follow these commands on the terminal and let me know of the result?
Command 1: /usr/bin/pgrep fingagent
Command 2: sudo lsof -nP -iTCP:48080 -sTCP:LISTEN
On running the 2nd command, it will ask for a password and you need to enter the login password of your MacBook
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Hi Robin, thanks for the response. Here is the output of those commands.
$
Can you please run this command and then reboot your device and then check if the issue persists?
Command: sudo kill -9 1022
I will be looking forward to your reply.
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I have the same problem. Never completes (and uses a credit each time!)
Fing is also alerting me that DHCP is "not healthy" and then that everything is working properly a few minutes later. The two messages alternate continually (and continuously).
As far as I can tell DHCP is working fine - new devices connect without issue. The only evidence that something is wrong is the warning. It's possible that there are an unusually large number of devices on the single DHCP server, but it's within the maximum.
We have released a new Fing desktop version 2.1.0 with major bug fixes. Can you please uninstall the Fing desktop and reboot the device and then install the new version and check OR you can leave the Fing desktop open for few minutes and then it will ask to upgrade the Fing desktop.
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The new release has the same problem as the previous one.
Late 2013 iMac running 10.15.5 here.
Will update to 10.15.6 tonight.
Can you try these commands and then reboot the device and then check? Also, Are you running any antimalware or firewall on mac device?
Command 1: /usr/bin/pgrep fingagent
The first command will return a Number(1234 suppose)
Command 2: sudo kill -9 number_returned_by_first_command
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Just completed!
So fixed for me.
Robin, you didn't mention the prompt for a password in your instructions. I entered the password that I use to logon to the MacBook and it seemed to accept it. Did I do everything correctly?
Oops - forgot to mention that I am not using any anti malware but I am using the macOS firewall with permissions granted for Fing Desktop to run.
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@Robin, can you confirm that I ran the commands correctly? Was the prompt for a password expected or did it indicate that the commands may have not completed correctly?
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1. I opened Fing Desktop to confirm it is v2.1.0 and then ran the DHCP Discovery tool, which hung as usual.
2. I opened a Terminal window, copied and pasted the first command into it and pressed Enter.
3. I typed the second command into the Terminal window, using the number (142 this time) provided by running the first command, then pressed Enter.
4. I was prompted for a password again so I entered my MacBook login password followed by the Enter key.
5. I exited the Terminal window, shut down any open windows and restarted the Mac.
6. When it had restarted, I logged in and immediately opened Fing Desktop and ran the DHCP Discovery tool, which hung again!
Any other suggestions?
In this case, I would require the O.S of your MacBook and the log files to investigate.
Share the output of commands: 'ifconfig' and 'route print' from command line
Share the agent log: To access the agent log files:
Click on the Fing Desktop version in the bottom-left hand side of the screen
This will display two folders to open. We will need specific files from each of these folders.
Firstly, click on 'Open App Log Folder'
When the folder opens, we will now need to compress and share the log.log file (titled 'log' - all lowercase). To compress and share: right click on the file; choose 'Send to' & then choose 'Compressed zip folder'.
Back in Fing Desktop, now click on the 2nd folder 'Open Service Log Folder'
Compress all files inside the Service Log folder and follow the same process as previous. Please attach both compressed files and DM it to me.
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I have passed on log files to our developers and they are investigating the root cause of this. In meantime, if you can delete the Fing desktop and then reboot device and then re-install and then check to see if the issue persists that will be helpful. Thanks
Getting Started? Please refer to Community guidelines & Community User Guides("Helping Hand"). HAPPY POSTING!!!
Getting Started? Please refer to Community guidelines & Community User Guides("Helping Hand"). HAPPY POSTING!!!
The pgrep command now returns two numbers.
Getting Started? Please refer to Community guidelines & Community User Guides("Helping Hand"). HAPPY POSTING!!!