Problems using Cron in a rule

Setup, Configuration and Use Beginners
1

  • Platform information:

    • Hardware: pi3+
    • OS: raspbian stretch
    • Java Runtime Environment: java
    • openHAB version: 2

  • Issue of the topic:
    When I update my rule with a cron job statement in it somtimes it started the cronjob somtimes i need to restart openhab2 completely??? Why? how can I force to start the cron job??

2

“forcing” a cron job to start is nonsensical.

Please read the tutorial on how to ask for help.

3

My finding so far…

evrything is running fine but if i do this calculation in my rule it stopps

var String local_string_yesterday = now.minusDays(1).toString("yyyy-MM-dd") + "T23:59:00.0000" 
var Number local_number_wallplug2dailytotalenergy = (Z_way_number_WallPlug2_totalpower.state as DecimalType) - (Z_way_number_WallPlug2_totalpower.historicState(parse(local_string_yesterday)).state as DecimalType)

any Idea ???

4

Change to:

var DateTime local_time_yesterday = new DateTimeType(now.withTimeAtStartOfDay.minusMinutes(1).toString)
var Number local_number_wallplug2dailytotalenergy = (Z_way_number_WallPlug2_totalpower.state as Number) - (Z_way_number_WallPlug2_totalpower.historicState(local_time_yesterday)).state as Number)

Please post you item definitions, if you are using the UoM this will not work and you need another approach

5

Item

Number Z_way_number_WallPlug2_totalpower "Wallplug2 [%.3f]" (group_house_totalenergy) {channel="zway:zwayDevice:e5c7e372:2:sensorMultilevel-ZWayVDev_zway_2-0-50-0"}

your version had an error:

Error during the execution of rule 'dailytotalenergy': An error occurred during the script execution: Could not invoke method: org.eclipse.smarthome.model.persistence.extensions.PersistenceExtensions.historicState(org.eclipse.smarthome.core.items.Item,org.joda.time.base.AbstractInstant) on instance: null
6

Try this:

var local_time_yesterday = now.withTimeAtStartOfDay.minusMinutes(1)
var Number local_number_wallplug2dailytotalenergy = (Z_way_number_WallPlug2_totalpower.state as Number) - (Z_way_number_WallPlug2_totalpower.historicState(local_time_yesterday)).state as Number)
7

Still the same issue if iI run 1 calculation like this everything is fine but if I run 3 of them it stopped after a certain time

8

Can you post the whole rule, please.

9 
rule "dailytotalenergy"
    when
        Time cron "0 0/1 * * * ?"
    then
        var local_time_yesterday = now.withTimeAtStartOfDay.minusMinutes(1)
        var Number local_number_wallplug2dailytotalenergy = (Z_way_number_WallPlug2_totalpower.state as Number) - (Z_way_number_WallPlug2_totalpower.historicState(local_time_yesterday).state as Number)
        var Number local_number_wallplug3dailytotalenergy = (Z_way_number_WallPlug3_totalpower.state as Number) - (Z_way_number_WallPlug3_totalpower.historicState(local_time_yesterday).state as Number)
        //var Number local_number_wallplug4dailytotalenergy = (Z_way_number_WallPlug4_totalpower.state as Number) - (Z_way_number_WallPlug4_totalpower.historicState(local_time_yesterday).state as Number)
        //var Number local_number_wallplug5dailytotalenergy = (Z_way_number_WallPlug5_totalpower.state as Number) - (Z_way_number_WallPlug5_totalpower.historicState(local_time_yesterday).state as Number)
        //var Number local_number_wallplug6dailytotalenergy = (Z_way_number_WallPlug6_totalpower.state as Number) - (Z_way_number_WallPlug6_totalpower.historicState(local_time_yesterday).state as Number)
        //var Number local_number_wallplug7dailytotalenergy = (Z_way_number_WallPlug7_totalpower.state as Number) - (Z_way_number_WallPlug7_totalpower.historicState(local_time_yesterday).state as Number)
        //var Number local_number_wallplug8dailytotalenergy = (Z_way_number_WallPlug8_totalpower.state as Number) - (Z_way_number_WallPlug8_totalpower.historicState(local_time_yesterday).state as Number)
        //var Number local_number_wallplug9dailytotalenergy = (Z_way_number_WallPlug9_totalpower.state as Number) - (Z_way_number_WallPlug9_totalpower.historicState(local_time_yesterday).state as Number)
        //var Number local_number_wallplug10dailytotalenergy = (Z_way_number_WallPlug10_totalpower.state as Number) - (Z_way_number_WallPlug10_totalpower.historicState(local_time_yesterday).state as Number)
        //var Number local_number_wallplug11dailytotalenergy = (Z_way_number_WallPlug11_totalpower.state as Number) - (Z_way_number_WallPlug11_totalpower.historicState(local_time_yesterday).state as Number)
        //var Number local_number_wallplug12dailytotalenergy = (Z_way_number_WallPlug12_totalpower.state as Number) - (Z_way_number_WallPlug12_totalpower.historicState(local_time_yesterday).state as Number)
        //var Number local_number_wallplug13dailytotalenergy = (Z_way_number_WallPlug13_totalpower.state as Number) - (Z_way_number_WallPlug13_totalpower.historicState(local_time_yesterday).state as Number)

        

        var Number local_number_dailytotalenergy = local_number_wallplug2dailytotalenergy + local_number_wallplug3dailytotalenergy
        number_dailytotalenergy.postUpdate(local_number_dailytotalenergy)

        logInfo("yesterday is", local_time_yesterday.toString())
end
10

Maybe this item is wrong???

Number HTTP_number_pm10 "PM10: [%s µg/m³]" { http="<[http_luftdaten_2730:60000:JSONPATH($[0].sensordatavalues[0].value)]"}
Number HTTP_number_pm2_5 "PM2,5: [%s µg/m³]" { http="<[http_luftdaten_2730:60000:JSONPATH($[0].sensordatavalues[1].value)]"}
11

Why are you running this rule every minute?
Replace your cron with "0 0/1 * ? * * *"

12

Due to testing how it works…later I want to do it if sth. changed…

I came from an other system and there it works…

13

I found out that I had 32000 mysql connections after 6h running openhab without it was round 4.

MariaDB [(none)]> show status like 'Conn%';
+-----------------------------------+-------+
| Variable_name                     | Value |
+-----------------------------------+-------+
| Connection_errors_accept          | 0     |
| Connection_errors_internal        | 0     |
| Connection_errors_max_connections | 0     |
| Connection_errors_peer_address    | 0     |
| Connection_errors_select          | 0     |
| Connection_errors_tcpwrap         | 0     |
| Connections                       | 123   |
+-----------------------------------+-------+
7 rows in set (0.00 sec)

After round 30min I have 123 connections…but only running mysql.persist

// persistence strategies have a name and a definition and are referred to in t$
                                                                                
                                                                                
Strategies {                                                                    
   everyMinute  : "0 * * * * ?"                                                 
   everyHour    : "0 0 * * * ?"                                                 
   everyDay     : "0 0 0 * * ?"                                                 
   default = everyChange                                                        
}                                                                               
                                                                                
Items {                                                                         
 MQTT_number_weewx_outHumidity : strategy = everyMinute, restoreOnStartup       
 group_test* : strategy = everyMinute, restoreOnStartup                         
 group_house_totalenergy* : strategy = everyMinute, restoreOnStartup            
 group_house_actualpower* : strategy = everyMinute, restoreOnStartup            
}
14

That’s another topic milo, open a new thread