Hi~~,
I do changes a lot so that it can't easily merge. Just post it to tell your first.
It match my version of spring-boot-starter-grpc, for which I also post a pull request. They work well together.

Now I am using grpc 1.0.0. It's RoundRobin LB with it's TransportSet won't skip a dead connection. Can't figure it out without modifying grpc source code. So I have to modify it and deploy my new version. I don't know whether 1.2.0 have resolved this issue.
This is my code: RoundRobinServerList.getTransportForNextServer() .

When I am trying to upgrade to grpc 1.2.0, but there's something wrong with client. ( just change property "grpc.version" could upgrade.)
eureka and server is ok.

Here is the error stack.
2017-04-16 17:33:39 [pool-8-thread-1] ERROR [TaskUtils.java:95] - Unexpected error occurred in scheduled task.
io.grpc.StatusRuntimeException: UNAVAILABLE: Transport closed for unknown reason
at io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:227)
at io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:208)
at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:141)
at com.example.echo.EchoServiceGrpc$EchoServiceBlockingStub.echo(EchoServiceGrpc.java:135)
at com.example.grpc.springboot.Cmd.requestRegular(Cmd.java:55)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

thnx! i think i got most of the stuff merged (except for configuration) and upgraded the the grpc versions.