Java Runtime Environment: openjdk version “17.0.7” 2023-04-18
openHAB version: openHAB 4.0.1 Release Build
Issue of the topic: RRD4jPersistenceService complains about empty rrd file
If logs where generated please post these here using code fences:
2023-08-03 01:33:01.380 [ERROR] [d4j.internal.RRD4jPersistenceService] - Could not create rrd4j database file '/var/lib/openhab/persistence/rrd4j/It_Abstellraum_Wechselrichter_Betriebszeit.rrd': Invalid file header. File [/var/lib/openhab/persistence/rrd4j/It_Abstellraum_Wechselrichter_Betriebszeit.rrd] is not a RRD4J RRD file
There is a similar thread with tips / instructions for OH3 at Error message rrd4j invalid file header . Try them and report back here what worked and what did not work.