Topic
Propagating a trace ID hop by hop through request headers and reassembling spans into a tree at the backend.
A write-up on assembling execution trees from span events argues the hard part is not collecting logs but handling out-of-order, concurrent, incomplete and retried spans without lying.
Reality
A C4 container view of an EPCIS batch upload showed three services. One click actually fired seven independent executions, and nobody drew that until an incident forced the question.
Reality
eBPF uprobes can rebuild Go traces with no SDK in the call path. The cost moves rather than disappears: goroutine correlation, per-version register layouts, and inlined symbols.
Reality
A dev.to walkthrough argues the fix is not abandoning console.log but giving events identity and parentage: traceId, spanId, parentSpanId, one start, one completion.
Reality
A dev.to writeup splits observability into three emitters with almost nothing in common. The split explains why cost estimates, flush windows and missing traces keep surprising teams.
Reality