I am running into issues with android java-grpc where it can connect to the GRPC server (does not timeout) however claims that the services are unavailable. I have tested the server from python to python on two different machines and they are able to connect, however Android throws an exception. below is the method i use to connect and the full stack trace. Looks to be an issue with the conscrypt engine, but I can quite wrap my head around a solution.
public LoginDataSource() {
}
public Result<LoggedInUser> login(String username, String password) {
ManagedChannel commChannel = ManagedChannelBuilder.forAddress(server_string,55051).build();
LoginServiceGrpc.LoginServiceBlockingStub blockingStub = LoginServiceGrpc.newBlockingStub(commChannel);
GrpcServerComm.LoginData loginData = GrpcServerComm.LoginData.newBuilder().setUsername(username).setPassword(password).build();
try
{
GrpcServerComm.LoginRequest serverResponse = blockingStub.getLogin(loginData);
long serverResponseVal = serverResponse.getResponseVal();
LoggedInUser activeUser = new LoggedInUser(username,username);
return new Result.Success<>(activeUser);
}
catch (StatusRuntimeException e)
{
Log.d("Error", e.getMessage());
return new Result.Error(new IOException("Error logging in", e));
}
}
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.equinox.openeyes, PID: 4883
io.grpc.StatusRuntimeException: UNAVAILABLE
at io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:244)
at io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:225)
at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:142)
at com.equinox.openeyes.LoginServiceGrpc$LoginServiceBlockingStub.getLogin(LoginServiceGrpc.java:168)
at com.equinox.openeyes.data.LoginDataSource.login(LoginDataSource.java:33)
at com.equinox.openeyes.data.LoginRepository.login(LoginRepository.java:48)
at com.equinox.openeyes.ui.login.LoginViewModel.login(LoginViewModel.java:34)
at com.equinox.openeyes.ui.login.LoginActivity$5.onClick(LoginActivity.java:116)
at android.view.View.performClick(View.java:7350)
at android.view.View.performClickInternal(View.java:7327)
at android.view.View.access$3600(View.java:807)
at android.view.View$PerformClick.run(View.java:28166)
at android.os.Handler.handleCallback(Handler.java:907)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:216)
at android.app.ActivityThread.main(ActivityThread.java:7464)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:549)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:955)
Caused by: javax.net.ssl.SSLException: Unable to parse TLS packet header
at com.android.org.conscrypt.ConscryptEngine.unwrap(ConscryptEngine.java:797)
at com.android.org.conscrypt.ConscryptEngine.unwrap(ConscryptEngine.java:737)
at com.android.org.conscrypt.ConscryptEngine.unwrap(ConscryptEngine.java:702)
at com.android.org.conscrypt.ConscryptEngineSocket$SSLInputStream.processDataFromSocket(ConscryptEngineSocket.java:810)
at com.android.org.conscrypt.ConscryptEngineSocket$SSLInputStream.access$100(ConscryptEngineSocket.java:683)
at com.android.org.conscrypt.ConscryptEngineSocket.doHandshake(ConscryptEngineSocket.java:235)
at com.android.org.conscrypt.ConscryptEngineSocket.startHandshake(ConscryptEngineSocket.java:214)
at io.grpc.okhttp.OkHttpProtocolNegotiator.negotiate(OkHttpProtocolNegotiator.java:92)
at io.grpc.okhttp.OkHttpProtocolNegotiator$AndroidNegotiator.negotiate(OkHttpProtocolNegotiator.java:147)
at io.grpc.okhttp.OkHttpTlsUpgrader.upgrade(OkHttpTlsUpgrader.java:63)
at io.grpc.okhttp.OkHttpClientTransport$4.run(OkHttpClientTransport.java:571)
at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:923)
