Android O java.lang.RuntimeException: protocol negotiation failed

I am getting handshake failure on all gRPC requests when using Android 8.0, I am not sure if it is a gRPC library issue or Android O preview.

What version of gRPC are you using?

1.2.0

What JVM are you using (java -version)?

Android RunTime (ART)

What did you do?

It can be reproduced by trying to make gRPC request in Android O

What did you expect to see?

Request goes through and server responds back

What did you see instead?

Caused by: java.lang.RuntimeException: protocol negotiation failed 
at io.grpc.okhttp.OkHttpProtocolNegotiator.negotiate(OkHttpProtocolNegotiator.java:107)
at io.grpc.okhttp.OkHttpProtocolNegotiator$AndroidNegotiator.negotiate(OkHttpProtocolNegotiator.java:169)
at io.grpc.okhttp.OkHttpTlsUpgrader.upgrade(OkHttpTlsUpgrader.java:
at io.grpc.okhttp.OkHttpClientTransport$1.run(OkHttpClientTransport.java:433)
at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:117) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) 
at java.lang.Thread.run(Thread.java:764) 

[fbarzin]

@ericgribkoff We updated our Jetty servers to support ALPN and it resolved the issue. Thanks!

[fbarzin]

@ericgribkoff this sounds to be right! I am gonna update my server to support ALPN and will close the issue as soon as I confirm the fix. Thanks for the help!