Firebase需要gRPC。gRPC 似乎需要某种类型的ev3dev发行版缺少的加密协议？我真的希望 JDK > 8 可以解决这个问题，但最后Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)让我觉得一些基本的东西不受支持。
java -version
openjdk version "11.0.3" 2019-04-16
OpenJDK Runtime Environment (build 11.0.3+7-ev3)
OpenJDK Client VM (build 11.0.3+7-ev3, mixed mode, sharing)
robot@ev3dev:~$ java -Xshare:on -jar ev3-1.0-SNAPSHOT-jar-with-dependencies.jar
Exception in thread "main" java.util.concurrent.ExecutionException: com.google.api.gax.rpc.UnavailableException: io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:552)
at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:533)
at com.google.common.util.concurrent.FluentFuture$TrustedFuture.get(FluentFuture.java:82)
at com.google.common.util.concurrent.ForwardingFuture.get(ForwardingFuture.java:62)
at info.MYSTUFF.CloudBotDoc.<init>(CloudBotDoc.kt:54)
at info.MYSTUFF.BasicBot.<init>(BasicBot.kt:42)
at info.MYSTUFF.MainKt.main(Main.kt:11)
at info.MYSTUFF.MainKt.main(Main.kt)
Caused by: com.google.api.gax.rpc.UnavailableException: io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
at com.google.api.gax.rpc.ApiExceptionFactory.createException(ApiExceptionFactory.java:69)
at com.google.api.gax.grpc.GrpcApiExceptionFactory.create(GrpcApiExceptionFactory.java:72)
at com.google.api.gax.grpc.GrpcApiExceptionFactory.create(GrpcApiExceptionFactory.java:60)
at com.google.api.gax.grpc.ExceptionResponseObserver.onErrorImpl(ExceptionResponseObserver.java:82)
at com.google.api.gax.rpc.StateCheckingResponseObserver.onError(StateCheckingResponseObserver.java:86)
at com.google.api.gax.grpc.GrpcDirectStreamController$ResponseObserverAdapter.onClose(GrpcDirectStreamController.java:149)
at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39)
at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23)
at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40)
at io.grpc.internal.CensusStatsModule$StatsClientInterceptor$1$1.onClose(CensusStatsModule.java:699)
at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39)
at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23)
at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40)
at io.grpc.internal.CensusTracingModule$TracingClientInterceptor$1$1.onClose(CensusTracingModule.java:397)
at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:459)
at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:63)
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.close(ClientCallImpl.java:546)
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.access$600(ClientCallImpl.java:467)
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:584)
at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)
Caused by: io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
at io.grpc.Status.asRuntimeException(Status.java:532)
... 22 more
Caused by: javax.net.ssl.SSLHandshakeException: No appropriate protocol (protocol is disabled or cipher suites are inappropriate)
at java.base/sun.security.ssl.HandshakeContext.<init>(Unknown Source)
at java.base/sun.security.ssl.ClientHandshakeContext.<init>(Unknown Source)
at java.base/sun.security.ssl.TransportContext.kickstart(Unknown Source)
at java.base/sun.security.ssl.SSLEngineImpl.beginHandshake(Unknown Source)
at io.grpc.netty.shaded.io.netty.handler.ssl.JdkSslEngine.beginHandshake(JdkSslEngine.java:155)
at io.grpc.netty.shaded.io.netty.handler.ssl.SslHandler.handshake(SslHandler.java:1756)
at io.grpc.netty.shaded.io.netty.handler.ssl.SslHandler.startHandshakeProcessing(SslHandler.java:1675)
at io.grpc.netty.shaded.io.netty.handler.ssl.SslHandler.channelActive(SslHandler.java:1810)
at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelActive(AbstractChannelHandlerContext.java:213)
at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelActive(AbstractChannelHandlerContext.java:199)
at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelActive(AbstractChannelHandlerContext.java:192)
at io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline$HeadContext.channelActive(DefaultChannelPipeline.java:1422)
at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelActive(AbstractChannelHandlerContext.java:213)
at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelActive(AbstractChannelHandlerContext.java:199)
at io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline.fireChannelActive(DefaultChannelPipeline.java:941)
at io.grpc.netty.shaded.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:311)
at io.grpc.netty.shaded.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:341)
at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:644)
at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:591)
at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:508)
at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:470)
at io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:909)
at io.grpc.netty.shaded.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
... 1 more