[2748109647]

Closes #9027

Problem

Android applications using the OTLP exporter can receive R8/ProGuard missing-class warnings for optional OpenTelemetry incubator and autoconfigure APIs. The OTLP module compiles against api:incubator and sdk-extensions:autoconfigure-spi as compileOnly, so consumers that do not include those optional artifacts currently need to copy suppression rules into their app.

Change

Bundle the narrow -dontwarn rules requested in the issue in META-INF/proguard/consumer-rules.pro for the opentelemetry-exporter-otlp JAR. R8 can discover consumer rules from this JAR metadata, so Android consumers no longer need to duplicate them in application configuration. The rules do not keep classes or change runtime behavior.

Verification

• git diff --check passed.
• A JDK 25 JAR smoke check confirmed the resource path is META-INF/proguard/consumer-rules.pro.
• Local :exporters:otlp:all:check did not complete. Gradle stalled while resolving the Kotlin 2.4.10 compiler dependency for buildSrc; an offline retry confirmed that artifact is not cached.
• GitHub Actions macOS/Java 21 completed :exporters:otlp:all:check and :exporters:otlp:all:build. The overall workflow remains failed: Java 21/25 runs had timeouts in unrelated sdk:metrics:testIncubating stress tests, macOS Testcontainers could not find Docker, and the Java 25 run could not resolve codeload.github.com while downloading the declarative-config schema. The changed OTLP module tasks completed without a reported failure.
• EasyCLA still requires the account owner to sign the CNCF CLA.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: 2748109647 / name: Alpha (cf0d3f3)

[opentelemetry-pr-dashboard]

Pull request dashboard status

Waiting on the author · refreshed 2026-11-11 06:13 UTC

Investigate required status check failures.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.36%. Comparing base (53d860b) to head (cf0d3f3).

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #9028      +/-   ##
============================================
+ Coverage     90.33%   90.36%   +0.02%     
- Complexity    11017    11019       +2     
============================================
  Files          1021     1021              
  Lines         30124    30124              
  Branches       3933     3933              
============================================
+ Hits          27214    27222       +8     
+ Misses         1953     1942      -11     
- Partials        957      960       +3     

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[2748109647]

I investigated the failed matrix jobs:

• macOS / Java 21 fails in the unrelated :sdk:metrics:testIncubating task: SynchronousInstrumentStressTest.partialWriteStressTest timed out after 10 seconds.
• macOS / Java 25 has the same metrics stress-test timeouts. It also fails :sdk-extensions:declarative-config:downloadConfigurationSchema with UnknownHostException: codeload.github.com.
• In the Java 21 run, the changed module's :exporters:otlp:all:check and :exporters:otlp:all:build both completed.

The PR only adds the requested ProGuard consumer-rules resource, so these failures do not point to a failure in the changed module. I could not complete the local Gradle check because resolving the Kotlin 2.4.10 compiler dependency for buildSrc stalled and the artifact is not cached for offline use. Could a maintainer rerun the two failed matrix jobs when convenient?