After Migration to OH4 and Java 17 some of my Rules won´t work with error "null"

Setup, Configuration and Use Migration
1

After updating openHAB to 4.0 (running on Debian 12 with zulu17) some of my rules just won´t get executed by themself (by the triggers in the rule), but work if i run them manually in the Webinterface.
The errors are the following:

│2023-07-25 21:14:00.004 [ERROR] [e.automation.internal.RuleEngineImpl] - Failed to execute rule 'rollladen-12': null                                              │
│2023-07-25 21:14:00.004 [ERROR] [e.automation.internal.RuleEngineImpl] - Failed to execute rule 'rollladen-15': null                                              │
│2023-07-25 21:14:00.004 [ERROR] [e.automation.internal.RuleEngineImpl] - Failed to execute rule 'rollladen-2': null                                               │
│2023-07-25 21:14:00.004 [ERROR] [e.automation.internal.RuleEngineImpl] - Failed to execute rule 'rollladen-18': null

I don´t know why there is no description why the rules fail to execute. Can someone help me?

One example rule with this error is this:

rule "Luftreiniger Küche Filter unter 10 Prozent Benachrichtigung"
when
    Time cron "0 0 18 1/1 * ? *"
then
    if (EG_Luftreiniger_Kueche_filterlife.state < 1) {
        executeCommandLine("/home/openhab/signal-api.sh", "Verbleibende Filterlaufzeit in Luftreiniger Küche beträgt unter 1%", "+49123456789")
    }
end```

Thanks
2

Isn’t the unit ( % ) missing in your comparison ? What type is being used for G_Luftreiniger_Kueche_filterlife ?

3

The Unit should not be neccesary as its not defined in the item itself:

Number EG_Luftreiniger_Kueche_filterlife			"Filter [%s %%]"								<cistern>														{channel="miio:basic:123:filterlife"}
4

Can somebody help me here please? I cannot find any problem.
It also seems to not happen after every restart of openhab, but if it happens, it continues for many rules.

Can i enable some sort of debug message to find the root of the problem?

5

Log Info state and check if this really a number only. Does your script works via CLI?
Openhab has rights to execute the script?

6

The script works if i run it manually via WebUI and its not the only rule.
This simple rule also throws this error:

rule "Timer JIB Trockner Keller zurücksetzten"
when 
	Item KG_Trockner_JIB_status changed from ON to OFF
then
	KG_Trockner_JIB_countdown.postUpdate("0")
end

When running the same rule again, all works fine, but after every restart, this error happens when the trigger fires.

7

Only the first time or also next times?

8

The first run after every restart of openhab. If openhab runs for a week or two, then no more issues until i restart openhab.

9

Hi, I haven’t read logs at the moment but I have something similar. I’m using Docker and after moving from OH3 to OH4 I have issues with rules that I added years ago.
My rule has this syntax:

rule "Read Daikin State"
when 
	Item DaikinMode changed
then
	....
    etc.
    ....
end

I’ve noted that it is triggered only by a command and not by an update.
In my case, if I’m changing the clima mode from OH it works, if I change the clima mode from Alexa (using official Daikin Skill) it does not trigger because OH only receives an update and not a command

10

I created an issue on github for my error:

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