WAPT packages not visible on some VMs -- EWaptUnknownHost

Sami Khelil · June 19, 2026 - 5:28 PM

Hello,

For the past few weeks, I've been observing an intermittent problem on some VMs managed by our WAPT server: the packets assigned to these machines are no longer visible from the console.

The error observed in the WAPT server logs is:
Jun 19 08:44:04 XXXXX waptserver[1445]: 2026-06-19 08:44:04,804 [waptserver] CRITICAL update_host failed EWaptUnknownHost('Host certificate is not known for host 4ce6f7ed-0753-489a-8b4a-6ceaade49471, aborting').
The problem has occurred 3 to 4 times on 3 different VMs over the last 3 months.
It seems that the WAPT server no longer recognizes the client host's certificate.

Current workaround:
Running the following command from the affected machine resolves the issue: `wapt-get register

WAPTConsole Discovery version 2.6.1.17813`

June 25, 2026 - 6:05 PM

Hello Sami,

Could it be that the VMs in question were all generated using the same template on which WAPT had already been installed and registered?

If so, could you try the following command on the machines that are experiencing problems?

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 wapt-get reset-uuid

?

Sincerely,

Denis

Sami Khelil · June 25, 2026 - 9:00 PM

Thank you for your reply. Actually, I had an old WAPT 1.8 server that was working fine, and I installed a new WAPT 2.6 server. So I uninstalled the old agent (1.8) on the VMs, then installed the new agent (2.6). Everything is working correctly: the packages are updating, and I can add or remove them without any problems. I'll test it with the command `wapt-get reset-uuid` and let you know . Thanks.

Sami Khelil · June 30, 2026 - 3:04 PM

Good morning,

And there you have it, the problem has recurred, the VM's package list is indeed empty in the wapt console and I was able to see this error message under the wapt server.

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2026-06-30 09:00:08,415 [waptserver ] CRITICAL update_host failed EWaptUnknownHost('Host certificate in not known for host XXXXXXXXXXXXXXXXXX, aborting

The result of the command:

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C:\Program Files (x86)\wapt>wapt-get.exe reset-uuid
Using config file: C:\Program Files (x86)\wapt\wapt-get.ini
FATAL ERROR : [WinError 183] Impossible de créer un fichier déjà existant: 'C:\\Program Files (x86)\\wapt\\private\\db'

C:\Program Files (x86)\wapt>

June 30, 2026 - 3:55 PM

Hello Sami,

The result of the command:

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C:\Program Files (x86)\wapt>wapt-get.exe reset-uuid
Using config file: C:\Program Files (x86)\wapt\wapt-get.ini
FATAL ERROR : [WinError 183] Impossible de créer un fichier déjà existant: 'C:\\Program Files (x86)\\wapt\\private\\db'

C:\Program Files (x86)\wapt>

With what privileges? It needs to be launched with admin rights...

Denis

Sami Khelil · June 30, 2026 - 4:19 PM

Ah yes, sorry

Here is the result:

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C:\Program Files (x86)\wapt>wapt-get.exe reset-uuid
Using config file: C:\Program Files (x86)\wapt\wapt-get.ini
2026-06-30 10:15:33,840 CRITICAL Unable to update_server_status: Error on server:
EWaptMissingCertificate('You try to update status of an unknown host b8d0dd49-1302-430c-bd3c-d0fec31c4332 (domaine.XXX.XX). Please register first.')
2026-06-30 10:15:33,840 WARNING Update status failed, trying to register the computer...
New UUID: b8d0dd49-1302-430c-bd3c-d0fec31c4332

C:\Program Files (x86)\wapt>

That's why the solution I found was to add the command

Code: Select all

wapt-get register

in a planned task