micrometer-metrics/tracing

OTel Tracer Not Propagating Events - Missing Steps in Docs.

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#1,144 opened on Jul 26, 2025

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Description

Hello again team,

Referencing my last issue: https://github.com/micrometer-metrics/tracing/issues/1123

I found the issue why OTel Tracer was not propagating events. The sample codes provided here is incomplete.

Essentially, the EventPublishingContextWrapper provided by Micrometer OTel bridge was not wired up. What's missing:

            OtelTracer.EventPublisher eventPublisher = event -> {
                slf4JEventListener.onEvent(event);
                slf4JBaggageEventListener.onEvent(event);
            };

            ContextStorage.addWrapper(new EventPublishingContextWrapper(eventPublisher));

I had attempted to update the documents at here but realized that the sample in documentation was an extraction of top level variables initialization within the class (I.e. it wasn't possible to invoke the addition of the wrapper)

Contributor guide

Research direction
Update the documentation sample code to include the EventPublishingContextWrapper setup as described in the issue.
Tech stack
java
Domain
backend
Issue type
Documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaMicrometer
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65