Querying the metrics API with nullable values and Inf resolution

mtfurlan-lq — Tue, 17 Feb 2026 21:36:59 GMT

I'm using flagger for canary deployments, which always makes queries with infinite resolution, in order to resolve the entire query to one number.

I'm trying to make a query that returns the failure rate of a service, based on the outcome dimension of a metric of request length.

My problem is that the metric I'm querying is sometimes null, so I have to use :default(0, always), otherwise:

The metric expression yielded no data points and/or matching dimension tuples for the query timeframe. Consider appending the default transformation (for example, `:default(0)`) to the operands.

But this is incompatible with a resolution of Inf:

Illegal transform operator: Usage of default operator is only supported for resolutions other than `Inf`

I'm not able to change flagger to not use the Inf resolution.

My full query:

( http.server.requests :filter( and( eq("k8s.namespace.name","namespace"), eq("k8s.workload.name","deployment name"), ne("outcome","SUCCESS") ) ) :count :splitby("k8s.pod.name") :default(0, always) / http.server.requests :filter( and( eq("k8s.namespace.name","namespace"), eq("k8s.workload.name","deployment name") ) ) :count :splitby("k8s.pod.name") )

So how else could I approach this query to get a rate for http.server.requests failures?

topic Querying the metrics API with nullable values and Inf resolution in Dynatrace API

Querying the metrics API with nullable values and Inf resolution