Refreshing mqtt.items fires system_started rules

[sirLeone]

Any change in mqtt.items file causing adding or remove links triggers rules with “System started” Is it correct behaviour ? Tried restarting OH, removing/changing rules and items and it happens even with this simple config:

mqtt.items

String swiatloWarsztat_Reachable 		"Aktywny: [%s]"     <contactable>   (gT_lwt) 		{ channel="mqtt:topic:swiatloWarsztat:reachable" }
Number swiatloWarsztat_RSSI      		"WiFi [%d %%]"      <wifi>          (gT_rssi)		{ channel="mqtt:topic:swiatloWarsztat:rssi" }
Switch swiatloWarsztat                  "Warsztat"		    <light>         (g_swiatla) 	{ channel="mqtt:topic:swiatloWarsztat:power", channel="mqtt:topic:swiatloWarsztat:state_power" }

system_started.rule

rule "test rule"
	when 
		System started
	then

		logInfo("RULE","system_started rule triggered after mqtt.items reload")
end

Then i changed swiatloWarsztat to swiatloWarsztat1

logs:

==> /logs/openhab.log <==

2020-09-23 10:21:09.281 [INFO ] [el.core.internal.ModelRepositoryImpl] - Refreshing model 'mqtt.items'

==> /logs/events.log <==

2020-09-23 10:21:09.283 [.ItemChannelLinkAddedEvent] - Link 'swiatloWarsztat1-mqtt:topic:swiatloWarsztat:power' has been added.

2020-09-23 10:21:09.283 [.ItemChannelLinkAddedEvent] - Link 'swiatloWarsztat1-mqtt:topic:swiatloWarsztat:state_power' has been added.

2020-09-23 10:21:09.283 [temChannelLinkRemovedEvent] - Link 'swiatloWarsztat => mqtt:topic:swiatloWarsztat:power' has been removed.

2020-09-23 10:21:09.284 [temChannelLinkRemovedEvent] - Link 'swiatloWarsztat => mqtt:topic:swiatloWarsztat:state_power' has been removed.

==> /logs/openhab.log <==

2020-09-23 10:21:16.514 [INFO ] [.eclipse.smarthome.model.script.RULE] - system_started rule triggered after mqtt.items reload

[Charley]

That is what is always does.
It seems OK to me. If you lose the data you should use persistence.

[rossko57]

@sirLeone

Any change in mqtt.items file causing adding or remove links triggers rules with “System started” Is it correct behaviour ?

Yes. Well, “expected behaviour” anyway.
It is difficult to draw a line to please everyone about how far to go in re-initializing stuff where you have edited parts of a running system.

You will also see Items re-initialized, the visible effect of which is NULL state.

When you consider that “System started” rules are often used to initialize Items to known states, you can see the purpose here.

[sirLeone]

Thanks for explanation.