OkHttp 4.9.0 causes java.lang.LinkageError when NewRelic SDK is used.

[alapshin]

After upgrading to OkHttp 4.9.0 New Relic instrumentation agent fails with

java.lang.LinkageError: Method okhttp3.Request$Builder com.newrelic.agent.android.instrumentation.okhttp3.RequestBuilderExtension.delete() overrides final method in class Lokhttp3/Request$Builder;
    at com.newrelic.agent.android.instrumentation.okhttp3.OkHttp3Instrumentation.build(OkHttp3Instrumentation.java:34)
    at retrofit2.RequestFactory.create(RequestFactory.java:132)
    at retrofit2.OkHttpCall.createRawCall(OkHttpCall.java:208)
    at retrofit2.OkHttpCall.enqueue(OkHttpCall.java:130)
    at retrofit2.adapter.rxjava3.CallEnqueueObservable.subscribeActual(CallEnqueueObservable.java:42)
    at io.reactivex.rxjava3.core.Observable.subscribe(Observable.java:13099)
    at retrofit2.adapter.rxjava3.BodyObservable.subscribeActual(BodyObservable.java:35)
    at io.reactivex.rxjava3.core.Observable.subscribe(Observable.java:13099)
    at io.reactivex.rxjava3.internal.operators.observable.ObservableSingleSingle.subscribeActual(ObservableSingleSingle.java:36)
    at io.reactivex.rxjava3.core.Single.subscribe(Single.java:4813)
    at io.reactivex.rxjava3.internal.operators.single.SingleOnErrorReturn.subscribeActual(SingleOnErrorReturn.java:38)
    at io.reactivex.rxjava3.core.Single.subscribe(Single.java:4813)
    at io.reactivex.rxjava3.internal.operators.single.SingleSubscribeOn$SubscribeOnObserver.run(SingleSubscribeOn.java:89)
    at io.reactivex.rxjava3.core.Scheduler$DisposeTask.run(Scheduler.java:614)
    at io.reactivex.rxjava3.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:65)
    at io.reactivex.rxjava3.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:56)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
    at java.lang.Thread.run(Thread.java:764)

Downgrading OkHttp back to 4.8.1 solves this problem.
Version of NewRelic android agent doesn't seem to affect outcome. I tried both 5.26.0 and most recent 5.27.1 and result was the same.

[swankjesse]

Please report this to NewRelic. OkHttp model classes are not designed to be subtyped. If they're doing it anyway, they are playing with fire!

[swankjesse]

Related:
https://docs.newrelic.com/docs/mobile-monitoring/new-relic-mobile-android/install-configure/configure-proguard-or-dexguard-android-apps

[alapshin]

Ok, thanks for response.
Created matching discussion in relevant forum https://discuss.newrelic.com/t/newrelic-doesnt-work-with-okhttp-4-9-0/115403
If you think that there is nothing to do from OkHttp side feel free to close this issue.