Fail to execute rule ## - error

Setup, Configuration and Use Scripts & Rules
1

Hi all,

I have a rule that does a get-request if a specific item state is changed to on. This used to work OK but since I needed to restart OH it comes up with this error in the log:

2021-09-03 07:47:44.952 [ERROR] [e.automation.internal.RuleEngineImpl] - Failed to execute rule 'e6c6d10d7b': Fail to execute action: 4

Sometimes the rules does work and executes (I can see this by the result of the get-request that is indeed not fed back to OH). But sometimes the rule does not execute and indeed fails. Same error in both cases. Does anybody has a clue please? Logs, as you can see, are pretty minimal.
Rule itself:

triggers:
  - id: "1"
    configuration:
      itemName: network_TF_keuken
      state: ON
    type: core.ItemStateChangeTrigger
  - id: "2"
    configuration:
      itemName: network_TF_sk4
      state: ON
    type: core.ItemStateChangeTrigger
  - id: "3"
    configuration:
      itemName: network_TF_woonkamer
      state: ON
    type: core.ItemStateChangeTrigger
conditions: []
actions:
  - inputs: {}
    id: "4"
    configuration:
      type: application/javascript
      script: >-
        var logger =
        Java.type("org.slf4j.LoggerFactory").getLogger("org.openhab.model.script.Rules.Network");

        scriptExtension.importPreset("default");

        var HttpUtil = Java.type("org.openhab.core.io.net.http.HttpUtil");

        var tf = event.itemName.split('_')[event.itemName.split('_').length - 1];

        logger.info("var tf = " + tf);

        HttpUtil.executeUrl("GET", "http://192.168.10.28/led.php?kamer=" + tf, 1);
    type: script.ScriptAction
2

So add some more so you can determine which line in that rule it is failing on. Is there a reason you are not using sendHttpGetRequest?

3

I found my way via google. The sendHttpGetRequest wasn’t working for me but that is most likely due to my coding skills.

I’ll add more info-log-lines but up until I set var tf this rule looks the same as others so it can’t be going wrong in many ways :wink:

4

Rule:

var logger =
        Java.type("org.slf4j.LoggerFactory").getLogger("org.openhab.model.script.Rules.Network");

        scriptExtension.importPreset("default");

         logger.info("Part 1");

        var HttpUtil = Java.type("org.openhab.core.io.net.http.HttpUtil");

        logger.info("Part 2");

        var tf = event.itemName.split('_')[event.itemName.split('_').length - 1];

        logger.info("Part 3");

        logger.info("var tf = " + tf);

        logger.info("Part 4");

        HttpUtil.executeUrl("GET", "http://192.168.10.28/led.php?kamer=" + tf, 1);

        logger.info("Part 5");

Log:

2021-09-03 22:34:09.624 [INFO ] [g.openhab.model.script.Rules.Network] - Part 1

2021-09-03 22:34:09.631 [INFO ] [g.openhab.model.script.Rules.Network] - Part 2

2021-09-03 22:34:09.644 [INFO ] [g.openhab.model.script.Rules.Network] - Part 3

2021-09-03 22:34:09.646 [INFO ] [g.openhab.model.script.Rules.Network] - var tf = sk4

2021-09-03 22:34:09.647 [INFO ] [g.openhab.model.script.Rules.Network] - Part 4

2021-09-03 22:34:09.655 [ERROR] [e.automation.internal.RuleEngineImpl] - Failed to execute rule 'e6c6d10d7b': Fail to execute action: 4

So it fails at HttpUtil.executeUrl("GET", "http://192.168.10.28/led.php?kamer=" + tf, 1); but the request does get sent…

It was this topic where I got my script from.

5

It might tell you why if you listen to it

var results = HttpUtil.executeUrl("GET", "http ...
logger.info("results " + results);

Your timeout doesn’t seem very generous, 1mS?

6

Thanks for the hint. Hope with the increase in timeout it will get past your suggested approach because now it does not execute anything after that specific line.

I do/did not need the result, just the command send to the other device so I thought ‘why wait for something I don’t want the reply from?’

We’ll see :slight_smile:

7

Unfortunately it doesn’t. It stops executing at the same line, although that line is now preceded by var results = .

8

Worth a try. Maybe if you use the sendHttpGetRequest() Action provided for use in rules, as hinted before, it might be more forthcoming.

javascript usage example

9

It is and works. So all of you thanks for the tips. I do wonder though why that other script did fail. Or sort of failed. The http-get-request was sent but then it still produced an error.