Openhab 4.0.x rules need a lot of memory

[hmerk (Hans-Jörg Merk)]

@Wikibear

The transformation add-on ‘javascript’ does not exist

Don‘t know if this had been asked before, but did you update your rules to use GraalVM and not Nashorn?
Also check the config for 3.x leftovers…
This one might be helpfull

OH4 transformationService of type 'JS' is unavailable

I just migrated to OH4 today. On startup it shows 20 to 30 of the following warnings. It is perhaps related to this thread albeit the latter is from 2016. It is probably a timing issue related to ‘start level’ since it does not occur after the ‘Rule Engine started’ information has appeared in the log file. 2023-08-16 17:33:51.921 [WARN ] [s.internal.SingleValueTransformation] - couldn't transform response because transformationService of type 'JS' is unavailable