Hi, UNAVAILABLE is one of the gRPC status codes, like 503 in HTTP status code. You can read more about the gRPC status code at https://github.com/grpc/grpc/blob/master/doc/statuscodes.md.
What you are experiencing could have many different causes. I would recommend tuning up the Java client's log verbosity to see what exactly is failing the connection. Lidi Zheng On Mon, Jun 14, 2021 at 11:56 PM 李灵韬 <[email protected]> wrote: > > I changed my code > ManagedChannelBuilder.forAddress("localhost", > port).usePlaintext().build(); > to > ManagedChannelBuilder.forAddress("localhost", > port).forAddress("127.0.0.1", port).usePlaintext().build(); > , this seems to succeed, no errors occurred, very strange > 在2021年6月15日星期二 UTC+8 上午11:34:46<李灵韬> 写道： > >> Caused by: >> io.grpc.netty.shaded.io.netty.channel.AbstractChannel$AnnotatedConnectException: >> Connection refused: no further information: /127.0.0.1:50051 >> Caused by: java.net.ConnectException: Connection refused: no further >> information >> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) >> at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source) >> at >> io.grpc.netty.shaded.io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:330) >> at >> io.grpc.netty.shaded.io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:334) >> at >> io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:702) >> at >> io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650) >> at >> io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576) >> at >> io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) >> at >> io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) >> at >> io.grpc.netty.shaded.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) >> at >> io.grpc.netty.shaded.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) >> at java.lang.Thread.run(Unknown Source) >> >> 在2021年6月15日星期二 UTC+8 上午10:49:23<李灵韬> 写道： >> >>> Do I need to provide more information? >>> >>> 在2021年6月15日星期二 UTC+8 上午10:45:28<李灵韬> 写道： >>> >>>> I recently added grpc to my app, but it occasionally reports errors, >>>> which cannot be reproduced stably. >>>> Console output: >>>> java.util.concurrent.ExecutionException: >>>> io.grpc.StatusRuntimeException: UNAVAILABLE: io exception >>>> at >>>> com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:566) >>>> at >>>> com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:547) >>>> >>>> My client uses Java, the server uses Python, and the grpc version is >>>> 1.36.0 >>>> >>> -- > You received this message because you are subscribed to the Google Groups " > grpc.io" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/grpc-io/bb149700-1af6-46fd-a5cc-37294b478e5bn%40googlegroups.com > <https://groups.google.com/d/msgid/grpc-io/bb149700-1af6-46fd-a5cc-37294b478e5bn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/CAMC1%3DjeEdTBcy94BSeMOWJRYYzi5%3D_yG4SHd4tobZ-jGEwFP1Q%40mail.gmail.com.
