@NewSpan/@SpanTag not working on interface methods

[janchristian-haddorp]

The combination @NewSpan/@SpanTag seems not fully working on interface methods - like JPA repo methods.

Instead of creating a new span for the actual repo call and parent span is getting duplicated. All declared span tags are also added to parent span.

In contrast the @Observed annotation works quite well on both - normal class methods as well as interface methods.

Tested with latest Spring Boot 3.3.1 release.

Is this topic Spring Boot related or has it been addressed to Micrometer directly?

[wilkinsona]

Have you set management.observations.annotations.enabled to true? Beyond this, the annotations are a Micrometer feature and any problem with their functionality is more likely to lie there.

[janchristian-haddorp]

Yes, management.observations.annotations.enabled is set to true. But as far as I can see the prop has no effect - working same way with or without.

With Spring Boot 3.3.1 is @NewSpan/@SpanTag working quite fine - if added to a class method.

It is a quite specific issue. When tracing JPA repos there is no class, just an interface.

I agree this case might be more Micrometer related. However, Spring Boot (or Spring Data) does the implementation of the interface.

[wilkinsona]

Closing in favor of micrometer-metrics/tracing#763. The annotations are handled by io.micrometer.tracing.annotation.SpanAspect and io.micrometer.tracing.annotation.SpanTagAnnotationHandler, both of which are part of Micrometer Tracing.