[OH3, Ubuntu] Permission issue for persisting data with rrd4j

Add-ons Persistence Services
1

Dear Community,

Yesterday I ran into this issue, that my dummy switch which is linked to a channel creates some log files which are showing that there are some problems with the persistence, see:

00:57:27.087 [INFO ] [openhab.event.ItemStateChangedEvent  ] - Item 'JobaDevSwitch' changed from OFF to ON
00:57:27.091 [ERROR] [rd4j.internal.RRD4jPersistenceService] - Could not create rrd4j database file '/var/lib/openhab/persistence/rrd4j/JobaDevSwitch.rrd': /var/lib/openhab/persistence/rrd4j/JobaDevSwitch.rrd (Permission denied)

Thanks in advance for some advice, how to solve this? Moreover thanks for some additional advice to get to the root of this issue.

Best regards,
Jochen

2

My advice is to provide more information. We do not know how you installed OH or what troubleshooting steps you have already tried. It appears to either be a permissions or disk space issue which would be OS related, outside of OH.

3

Thanks Bruce,

I used the default Ubuntu-way by apt, see openHAB on Linux | openHAB
The system is running on Ubuntu 20.04. Ubuntu runs in a virtual machine on a windows host. Of course I can set the permissions properly on my system, but I guess this will be an issue which got its origin somewhere else.

4

Repository is only one way. Manual zip file & Docker are alternatives, for instance.

If the permissions are indeed incorrect, you should open an issue on GitHub, likely for the distro to get it fixed.

5

Dear Bruce,

Thanks - I got the same idea, so I am wondering if anyone else used the apt-installation and the same occured?

I will file an issue on github after I got some feedback here.

Cheers,
Jochen

6

Interesting - one of the persistence file was added to owner root and group root instead of openhab (like the others). I changed it and all runs smoothly.

1 Like
7

I observed the same behaviour, when using a .things file - the files which should be generated in /var/lib/openhab/jsondb have the user and group root instead of openhab. I guess it is the right time to create a ticket on github. I will go for it.

8

Lösung ist auf der Ubuntu-Maschine dann übrigens der Kommandozeilenbefehl:
sudo chown --recursive openhab:openhab /var/lib/openhab/jsondb

9

That raises the question if openHAB is running as a user, how did it get root access??