OH3 mapdb items not restore after restart

Setup, Configuration and Use Installation
1

I have configure my mapdb like below list

mapdb.persist

Strategies {
    default = everyUpdate
}

Items {
        WBeleuchtungSwitchLight ,
        WBeleuchtungSwitchActive ,

        gSchaltUhAuOn* : strategy = everyChange, restoreOnStartup
}

the storaging of the items is still working

logging:

2020-12-26 20:47:52.657 [DEBUG] [pdb.internal.MapDbPersistenceService] - Stored 'WBeleuchtungSwitchActive' with state 'ON' as '{"name":"WBeleuchtungSwitchActive","state":"org.openhab.core.library.types.OnOffType@@@ON","timestamp":"Dec 26, 2020, 8:47:52 PM"}' in MapDB database

but after restart the stored item values are not restored, so the item values is “null”

2

I’m using mapDB to restore every item at startup with a really simple persist file and it basically works just fine.

Strategies {
   default = everyChange
}
 
Items {
   *: strategy = everyChange, restoreOnStartup
}

Did you try to persist everything just for test purposes?

3

Hi, i have the same Problem for restore item states after reboot/restart OpenHab.
Also with only the default installed persistence rrd4j the System doesn’t not Restore any Items states. :frowning:

4

Same issue with mapdb here :neutral_face:
Where Do I have to configure persistence?
is it still in config file:
mapdb.persist
?

5

Hello,

i solved my issue.
My problem was the the ZRAM in openhabian. After a deactivaiting and a subsequently activating of ZRAM in openhabian-config I solved it.
Because with debugging i found out does after restart the mapdb always are empty

I saw the last days some Topics regarding the ZRAM, so it looks like at first Run after a new installation it works not correct.

6

Hi.

Thanks for the hint, this also help by my Problem with the restore item state. After “Uninstall ZRAM” and than “User ZRAM”, the item state is persistens across reboot!!