setTimeout throws 'Multi Threaded Access Requested' exception

[rossko57]

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Multi threaded access exception (rule using JavaScript/ECMAScript-2021, utilising a timer within an npm module)

Hi all, I have created a rule within the openHAB UI that is used by a IKEA Tradfri remote control. It increases/decreases a light’s brightness. The action part of the rule uses ECMAScript-2021 running on the GraalVM. As I would like to use the main part of the code by multiple remote controls, I put that into an npm module. The code does what it should do: It increases and decreases the brightness of a connected light item. But the log shows now and then an error message: 2022-01-09 14:49:02…