[Bug]: is follows from UI working?

[rackerWard]

What happened?

As a Jaeger user, I would like to see trace's include follows_from spans, so that I can follow workflows and have graphs that also include follows_from.

In frontend Trace Timeline, it has a link to the follows_from span.

In the loadgenerator TraceTimeline, there isn't any indication the span is referenced by a followed_from span.

In the loadgenerator Trace Graph, there isn't any FollowsFrom paths

In the frontend Trace Graph, there isn't any FollowsFrom paths

Steps to reproduce

1. Run opentelemetry demo v1.4.0
2. open Jaeger
3. access traces having follows_from references

Expected behavior

I was expecting to see Tracing Timelines include follows_from spans as child spans.
I was expecting to see Tracing Timelines indicate a span is referenced by other spans as a follows_from.
I was expecting to see System Architecture link services based on follows_from.
I was expecting to see Tracing Graph include follows_from spans.

Relevant log output

No response

Screenshot

No response

Additional context

No response

Jaeger backend version

No response

SDK

No response

Pipeline

No response

Stogage backend

No response

Operating system

No response

Deployment model

No response

Deployment configs

No response

[yurishkuro]

If the trace you're looking at is non-sensitive/anonymized, please upload it to GH Pastebin so that we can reproduce.

[rackerWard]

The OpenTelemetry demo will reproduce the data necessary. https://opentelemetry.io/docs/demo/docker-deployment/
The demo will spawn the necessary docker containers (including Jaeger). It has a loadgenerator that issues synthetic requests that will replicate the events described.
The two services to observe loadgenerator and frontend

[rackerWard]

I have found Jaeger will display the icon for the span that contains the span link (follows_from).
The architecture graph does not include service's that are connected via span links. I have seen work arounds that attach an additional span to the trace span, even though it creates a span link.