javax.script.ScriptException: Could not cast DateTimeType #5323
Description
I'm on OH5.1.1 raspi system with rrd4j as default persistence.
Following rule is drawing my attention, Test_DateTime is a standalone DateTime item not connected to any channel.
rule "Date Time Test"
when
Time cron "0,15,30,45 * * ? * *"
then
logInfo("DateTime Test", "####")
if(Test_DateTime.state == NULL) {
Test_DateTime.postUpdate(new DateTimeType())
}
// any logging here and the error will not occur (at least on my machine)
val dateTime = (Test_DateTime.state as DateTimeType).getZonedDateTime(ZoneId.systemDefault())
// set to NULL for the next cycle
Test_DateTime.postUpdate(NULL)
end First:
I know the postUpdate is performed ansynchronous.
Sometimes it works, sometime not and I don't wonder to receive these errors Could not cast NULL
15:47:00.548 [ERROR] [l.handler.AbstractScriptModuleHandler] - Script execution of rule with UID 'datetime-1' failed: Could not cast NULL to org.openhab.core.library.types.DateTimeType; line 49, column 21, length 35 in datetime
javax.script.ScriptException: Could not cast NULL to org.openhab.core.library.types.DateTimeType; line 49, column 21, length 35 in datetime
But sometimes I receive this
Could not cast 2026-02-02T15:47:30.400405676+0100 to org.openhab.core.library.types.DateTimeType;
15:47:30.395 [INFO ] [enhab.core.model.script.DateTime Test] - ####
15:47:30.403 [ERROR] [l.handler.AbstractScriptModuleHandler] - Script execution of rule with UID 'datetime-1' failed: Could not cast 2026-02-02T15:47:30.400405676+0100 to org.openhab.core.library.types.DateTimeType; line 49, column 21, length 35 in datetime
javax.script.ScriptException: Could not cast 2026-02-02T15:47:30.400405676+0100 to org.openhab.core.library.types.DateTimeType; line 49, column 21, length 35 in datetime
at org.openhab.core.model.script.runtime.internal.engine.DSLScriptEngine.eval(DSLScriptEngine.java:146) ~[?:?]
at org.openhab.core.automation.module.script.internal.handler.AbstractScriptModuleHandler.eval(AbstractScriptModuleHandler.java:265) ~[?:?]
at org.openhab.core.automation.module.script.internal.handler.ScriptActionHandler.lambda$0(ScriptActionHandler.java:99) ~[?:?]
at java.util.Optional.ifPresent(Unknown Source) ~[?:?]
at org.openhab.core.automation.module.script.internal.handler.ScriptActionHandler.execute(ScriptActionHandler.java:86) ~[?:?]
at org.openhab.core.automation.internal.RuleEngineImpl.executeActions(RuleEngineImpl.java:1322) ~[?:?]
at org.openhab.core.automation.internal.RuleEngineImpl.runRule(RuleEngineImpl.java:1078) ~[?:?]
at org.openhab.core.automation.internal.TriggerHandlerCallbackImpl$TriggerData.run(TriggerHandlerCallbackImpl.java:86) ~[?:?]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:?]
at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:?]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) ~[?:?]
at java.lang.Thread.run(Unknown Source) [?:?]
This looks now like a valid DateTimeType but cast fails which I cannot explain.
Maybe concurrent acces to item state while updating?
But this would worry me because this can then happen all the time in rules accessing states or am I wrong?
PS: I know this rule is really stupid but the error shouldn't happen.