Preprocessing step change of order

[BigSmooth]

Hello,

I am running Zabbix 6.4.7.

I am playing with Apache Solr by HTTP template. In the template, item Solr: JVM memory heap usage (key: solr.jvm.memory.heap.usage), there are two preprocessing steps:
1. JSONPath
2. Custom multiplier

This is the order visible in template item.

When I go in host, item and then preprocessing steps, steps are inverted. This causes a failure:

Failed: cannot apply multiplier "100" to value of type "string": cannot convert value to numeric type

Did anyone saw that before?

Olivier

[cyber]

Are you sure they are inverted? Maybe your jsonpath returns a string and then second step fails? For example its not just a number, but number in ""-s or in []-s ?

You should be able to test this item by directly retrieving value from host and you should see all preprocessing steps and their results...

[BigSmooth]

Apparently, it is my additional template layer (which includes several templates) which causes this. Workaround is simple: Do not include template. Neverthelss, it can still be considered a bug. What do you think ?


On Apache SOLR template:




On my template which include Apache Solr template:




On host:

[cyber]

If you can replicate it easily, you can write a bug report here https://support.zabbix.com/projects/ZBX/issues

[arusso]

BigSmooth did you ever figure this out / submit an issue? I'm seeing this issue myself on 6.4.6.

[arusso]

I managed to work around it by deleting the last step of the preprocess (discard w/heartbeat), save, then re-add it. Once discovery ran again it sorted itself out.

[duchenpaul]

I can confirm this issue, it happens to me as well:

I am using https://github.com/zabbix/zabbix/tre.../db/postgresql, getting errors one of items, and it turns out to be the preprocessing step in revert order.
I tried to recreate the host using template for multiple times, no luck.