[Hawkular-dev] OpenShift: Metric table out of sync issue and heapster

[Michael Burman]

Hi,

That check is there because it greatly reduces the load on the 
Hawkular-Metrics in an existing environment. Otherwise, after the 
restart, the first time the metrics are sent it is going to make a huge 
amount of writes to HWKMETRICS and this will take time (the operations 
are slower than datapoint writes after all).

I'll make the change next week to allows deciding the behavior with a 
command line parameter (in case we fix it in the metrics some other way 
also - or this wasn't the real root cause for some reason).

   - Micke


On 05/25/2017 01:24 AM, Matt Wringe wrote:
> We are still running into issues on machines where the metric tables getting out of sync bug has not been fixed for it yet (https://issues.jboss.org/browse/HWKMETRICS-660).
>
> @miburman: would it be possible to update our Heapster sink to always update metrics when its started? Eg to remove this check https://github.com/kubernetes/heapster/blob/master/metrics/sinks/hawkular/client.go#L45
>
> I am not sure why we have that check in there in the first place, and I think we should always just update the tag definition on each start. That way if someone has run into the problem where the tags and metrics definitions get out of sync, they can just restart heapster to get things back working again.
>
> Any thoughts?
>
> - Matt