This topic can be used to discuss problems/experiences/questions on the openHAB 5.0 release as announced in this topic .

[image] Nadahar: so maybe there is something that could be done in Core to address this? I don’t see how. Rules DSL is just using the raw Java classes in this case. Everything involved here is part of Java. Monkey patching really isn’t a thing in Java so OH can’t really easily just add a fun…

[image] rlkoshak: ava so OH can’t really easily just add a function to java.lang.Thread that takes a Number. If anything can be done to address it it will probably have to be upstream in the Xtend project and not really something OH could or should fix just here. Java is typed, so it actually…

[image] Nadahar: So, the “type interference” is done either by OH or by xtend/xtext. It’s a core part of Xtend. It’s not done by OH. It’s all Xtend and Java and the interaction between the two, nothing implemented in OH itself. [image] Nadahar: But, it’s probably not “an inherit problem”…

[image] rlkoshak: It’s a core part of Xtend. It’s not done by OH. It’s all Xtend and Java and the interaction between the two, nothing implemented in OH itself. It looks like you’re right here. Sadly, Xtend seems like yet another one of those “failed projects” that fizzled out over time. Thei…

Hello, After migrating to Openhab 5 (and Java 21 and Debian 13), the android app is very often unresponsive (“socket closed”) whereas the web UI is all right. Looking at my reverse proxy, I see that the web UI makes “/basicui/” requests that are served instantaneously, whereas the android app make…

[image] joga: NoClassDefFoundError: Could not initialize class sun.awt.X11FontManager There’s now a new 5.0.1 Debian Docker image that should fix this error. So try pulling it and then recreate your container.

I built a container with the new image and it seems to be fine. Thanks!

[image] usambara: You’re right. It is defined in org.openhab.core.items.Item.json. And yes, I’m surprised… You certainly created this group one day with Main UI and then forget it. That is the interest of this warning, that is to inform you you have duplicated items.

[image] Nadahar: I’m also seeing the vertical scrollbars mysterically disappear now, where a reload might or might not bring them back. In the past weeks I took the opportunity to rebuild my system from scratch in OpenHAB 5.0.0. I also experienced quite often the intermittent lack of vertical…

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openHAB 5.0 Release Discussion

Setup, Configuration and Use News & Important Changes

usambara (Ulrich) August 25, 2025, 7:49pm 296

You’re right. It is defined in org.openhab.core.items.Item.json. And yes, I’m surprised…