[rudder-users] unexpected "unexpected" result

[Nicolas Charles]

Hi Tim,

Thank you for the detailed error report, I've been able to reproduce, 
and this is a bug in the evaluation of reports send by the agent.

When we use iterator in generic method, the Rudder server has no way to 
know evaluation which element will be in the iterator (except for the 
easy use case), so we have an option to automatically accept multiple 
reports from generic method when we have a variable in a component 
(parameter "Unbounded reports by elements when a variable is used" in 
the Setting page)

However, when it's only the condition which uses an iterator, as it is 
in your use case, we don't store this information, and don't aggregate 
the result of multiple reports from a given generic method - hence the 
"unexpected" reporting.

Note that the "-" in the comment is expected, it is only the reporting 
that shows what was the condition used; when used as a class it is 
correctly canonified.


As a *workaround*, you can define a variable string 
"grafana.service_name" with value "grafana", and in the service_restart 
generic method use ${grafana.service_name}; this will allows the reports 
aggregation.

I've opened issue https://issues.rudder.io/issues/16105 to correct this 
within Rudder,


Thank you very much for your message, and sorry you had a bad experience

Nicolas CHARLES

On 04/11/2019 20:22, tim taler wrote:
> Hi all
> I'm new to rudder, and ran into an unexpected problem.
>
> As an example I like to install grafana and some plugins.
> For the plugins I created a list-variable over which a command promise
> can iterate with grafana-cli to install the plugins.
>
> After a plugin installation grafana needs to be restarted though, so
> I tried to use the "repaired" class from the command promise to
> trigger a service restart.
>
> the compliance report but stays on:
> "[Unexpected] Service restart grafana-server if
> any.(command_execution__usr_sbin_grafana_cli_plugins_grafana-piechart-panel_repaired)
> was not applicable"
>
> As you might notice the plugins from the list contain "-" which AFAIK
> are illegal for a class name - is there any easy way to canonicalize
> them?
>
> TIA
>
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