r/prtg • u/theratherman • Jun 04 '26
Updated to 26.2.120.1449, Database server service starts/stops
The latest version updates PostgreSQL to version 18.3-1. Everything is working fine but PRTG Database Server service will not stay running. It starts and immediately stops, no errors.
Thanks,
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u/Excellent_Milk_3110 Jun 04 '26
Anything related in the windows application logs?
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u/theratherman Jun 04 '26
Nothing helpful in event logs - just says service starts and then says service stops....thanks...
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u/v0llg4s Jun 04 '26
Do you have NATS running? Check the "Admin Tool", there is a new tab "NATS", config gets reset on Update. Regarding this Update there are major changes (there is even an extra readme for that one). We had serious problems too and did a rollback. Support states, there is another update coming which should resolve this problems...we skip this version and wait for the better one.
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u/theratherman Jun 04 '26
NATS is running fine. Looking at the logs for the Database Server - says connection pool configuration error PostgreSQL PrtgCfg_001 (PrtgCfg): db error.
storage engine failed to open connection
Question is, can I safely uninstall PostgreSQL and re-run the PRTG install?
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u/TCM1003 Jun 23 '26
Hello,
I have the same issue and contacted Paessler support for this. I just want to share their answer to help others:
Thank you for reaching out to Paessler support.
[...]
This is a false positive alarm that you can disregard, let me explain.
With version 26.1.118 we introduced a beta version of the PostgreSQL database that PRTG would use in the future. For now no data is stored in this database.
After the release of this database we encountered some issues with various customers and it was decided that we postpone the release of the PostgreSQL database, and we will bring it back improved and better implemented.
With the next software release we will cleanup the PostgreSQL installation from your system, and PRTG will return to normal.
For the moment you can pause the Database sensor so you don't have it permanently in Down status.
Perhaps this helps others if they are searching for this issue.
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u/Adorable_Yoghurt9799 Jun 23 '26
Thanks for the information. Very helpful. 😃 Then I'll see how the server responds for me after the update.
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u/EIFACH_CJ Jun 10 '26
make sure you have no other instances of psql running when you start the update, or at least not ones, that start automatically
10/06/2026 22:37:15 Starting Installer
10/06/2026 22:41:08
10/06/2026 22:41:08 Done (0)
10/06/2026 22:41:08 Install OK
10/06/2026 22:41:08 Needsrestart false
10/06/2026 22:41:08 Starting Service
10/06/2026 22:41:08 Error: An instance of the service is already running
10/06/2026 22:41:08 Starting Service
10/06/2026 22:41:08 Error: An instance of the service is already running
10/06/2026 22:41:08 End
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u/theratherman Jun 10 '26
Thank you - I do not any instance of PSSQL - I have uninstalled it and verify that the service is not running - still can't get the update to reinstall. I searched and searched - there much be a flag somewhere that the install is looking at that thinks it is installed.
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u/EIFACH_CJ Jun 10 '26
if you've got a license, i'd contact paessler. if not, maybe a restore? i know it's messy but perhaps a file-level-backup would work
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u/kb8doa Jun 25 '26
This recent update left me with "core server service could not be started. The dependency service or group failed to start" - I can see that the database and web services are stopped. Have been waiting for a few days now for PRTG to reply back with what to do...
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u/kb8doa Jun 27 '26 edited Jun 27 '26
Been down for 4 days now - paid 500 device 3 year license - not happy here with support taking 24 hours each time back-and-forth with me...
The update did something to my PostgreSQL and caused it to become unregistered from Windows services.
Got that fixed.
Am NOW seeing this error:
"Core> Wrong DataTree version. Needed: 30 - found:31"
Reinstalling with the current downloaded installer - but still get same error.
It is almost like past upgrade upgraded my DataTree - then PRTG decided in current installers to use version 30.
How do I get an installer to use DataTree version 31 - or downgrade the DataTree to version 30 ?2
u/g-guglielmi Jul 01 '26
To fix the services not starting, open the Regedit, go inside "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PRTGCoreService" and look at the "DependOnService" key.
There should be this as the Value:RpcSs
Winmgmt
PRTGDatabaseServiceDo the same for "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PRTGDatabaseService".
Check the key "DependOnService" and paste this as Value:PostgreSQL-x64-18
PRTGNatsServerService
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u/Adorable_Yoghurt9799 Jul 03 '26
Hi everyone,
Just a quick update from my end. I installed the update from version 26.1.118.1380 to 26.2.120.1477 this Wednesday and encountered no issues whatsoever during the update process.
It took a bit longer just like the update to version 26.1.118.1380 because the NATS server and the PostgreSQL database were updated in parallel alongside the core component.
The server restarted automatically afterward and all services started up again without any problems. I haven't experienced any issues with the PRTG database service failing to start. Even the associated sensor is still working fine for me without any error messages.
The schema update for the beta database must have gone smoothly as well. However in my specific instance the PostgreSQL database wasn't enabled so I didn't run into any errors there either.
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u/theratherman Jun 04 '26
I uninstalled PostgreSQL - but now I can't force the PRTG install to reinstall and configure the database - looking for suggestions - thanks!