AssertionError at AsyncTimeout.java:101 for some android 4.4.2 and 4.4.4 devices

Hey okhttp. I’ve been confused with this AssertionError error for a while now. It only occurs on some android 4.4.2 and 4.4.4 devices. Have I missed something or could there be a real issue?

I am using okhttp 3.8.1 with retrofit 2.3.0 and dagger 2.11

    @Provides
    @Singleton
    OkHttpClient providesOkHttpClient() {
        OkHttpClient.Builder builder = new OkHttpClient().newBuilder()
                .readTimeout(30L, TimeUnit.SECONDS)
                .connectTimeout(30L, TimeUnit.SECONDS)
                .writeTimeout(30L, TimeUnit.SECONDS)
                .addInterceptor(new NetworkInterceptor());
        return builder.build();
    }

    @Provides
    @Singleton
    Retrofit provideCall(OkHttpClient client) {
        return new Retrofit.Builder()
                .baseUrl(BuildConfig.SERVER_PATH)
                .client(client)
                .addConverterFactory(MoshiConverterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.createAsync())
                .build();
    }

StackTrace

Android: 4.4.2
Thread: OkHttp Dispatcher-729

java.lang.AssertionError
	at okio.AsyncTimeout.scheduleTimeout(AsyncTimeout.java:101)
	at okio.AsyncTimeout.enter(AsyncTimeout.java:80)
	at okio.AsyncTimeout$1.flush(AsyncTimeout.java:193)
	at okio.RealBufferedSink.flush(RealBufferedSink.java:218)
	at okhttp3.internal.http1.Http1Codec.finishRequest(Http1Codec.java:164)
	at okhttp3.internal.http.CallServerInterceptor.intercept(CallServerInterceptor.java:84)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
	at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:45)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
	at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
	at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
	at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:125)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:147)
	at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
	at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200)
	at okhttp3.RealCall$AsyncCall.execute(RealCall.java:147)
	at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
	at java.lang.Thread.run(Thread.java:848)

[lucastsantos]

We at @StudioSol had the exactly same problem. We did a series of tests trying to solve it and we ended up finding out that the problem was in the build process.

We had switched to Gradle 3.1.0-alpha1, which uses D8 compiler instead of DX compiler by default. After switching to DX compiler, the problem is no longer appearing.

A temporarily solution may be using Gradle 3.0.0 or disabling D8 compiler in gradle.properties with:

android.enableD8=false

[madsager]

We finally managed to reproduce this issue and identified the MediaTek JIT bug in the VM that is causing this. Certain long arithmetic and comparison instructions are incorrectly handled by the JIT. Luckily, we can workaround the issue by forcing the register allocator to avoid certain registers combinations for long operations. We are working on that fix now and will push it out ASAP. When Android Studio 3.1 goes final we expect this fix to be included. Thanks for all of the reports and help tracking this down.

Bug to follow for progress on the fix: https://issuetracker.google.com/issues/70909581