OTEL error "Can not execute the operation on ended Span"

[velias]

Issue Description

If subgraph call fails with http error (eg. 400), then there is error Can not execute the operation on ended Span {traceId: 496674e5d6add505f18b5cdcb6259322, spanId: e9285ed17413b036} in the app log from otel module. SpanId in the message is from gateway.postprocessing span. Looks like some error/result reporting doesn't work correctly for this Span.

Link to Reproduction

https://github.com/velias/apollographql-federation-issue-2652-reproducer

Reproduction Steps

• setup logging from otel
• execute query on gateway which produces http error in subgraph
• look into gateway log file

[trevor-scheer]

Hey @velias, this isn't a trivial reproduction. Please share a repository I can clone which demonstrates the issue without any creativity on my part with any necessary steps I need to take to trigger the error.

[velias]

OK, but I'm leaving for holiday later this week, not sure if I'll be able to provide it before. So be patient please.

[velias]

OK, was able to do it today, reproducer is here https://github.com/velias/apollographql-federation-issue-2652-reproducer
Instructions in README.md

[trevor-scheer]

Thanks @velias! Hoping to get a look at this tomorrow.

[velias]

Thanks for the patch