[Dialogflow] com.google.api.gax.rpc.UnavailableException: io.grpc.StatusRuntimeException: UNAVAILABLE: io exception

dialogflow를 이용하여 챗봇을 만들었는데, 테스트 하던 중에 간헐적으로 다음과 같은 에러가 발생하는 것을 발견했다. 

간헐적이라고 하지만 랜덤으로 하루에 많게는 10회 이상 발생하고 운이 좋으면 1, 2회 정도가 발생했다. 

그래서 로그 구문으로 구글에서 미친듯이 서칭을 했는데... 나와 유사한 에러 로그를 가진 (전세계) 사람들이 문의사항을 올린 것을 3~4건 발견했으나 모두 이렇다 할 답변은 없었다. 

 

이상한 것이 실서버에서는 이런 에러가 매일매일 발생하는데 테스트 서버에서 테스트 했을 때에는 이런 에러가 전혀 발생하지 않았다. was 2개 운영하던 것을 1개로 줄이고, google cloud SDK 버전을 최신으로 업데이트 하고 이런저런 조치를 취했는데도 여전히 실서버에서는 에러가 뿜뿜! 테스트 서버는 SDK 버전도 한참 낮은데도 잘 굴러가고... ㅠㅠ

 

마지막으로 체크했던 것이 바로 DNS!

실서버와 테스트 서버에서 설정된 DNS server ip가 서로 달랐다. 테스트 서버의 ip를 실서버에 적용했더니 그동안의 조치들이 무색하게 에러가 사라졌다 ㅠㅠ 특히 LG회선을 쓰면서 KT DNS ip를 사용하는 분들은 수정할 것을 적극 권한다.

 

jio.grpc.netty.shaded.io.netty.channel.AbstractChannel$AnnotatedNoRouteToHostException: null: dialogflow.googleapis.com/2404:6800:4004:80d:0:0:0:200a:443 

이 부분을 보면 Host를 찾지 못한다고 나온다. Host를 찾지 못할 때에는 네트워크와 DNS 상태를 꼭 확인할 것!

 

===============================================================

 

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.GrpcExceptionCallable$ExceptionTransformingFuture.onFailure(GrpcExceptionCallable

.java:97)

     at com.google.api.core.ApiFutures$1.onFailure(ApiFutures.java:68)

     at com.google.common.util.concurrent.Futures$CallbackListener.run(Futures.java:982)

     at com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:30)

     at com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:1138)

     at com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:957)

     at com.google.common.util.concurrent.AbstractFuture.setException(AbstractFuture.java:748)

     at io.grpc.stub.ClientCalls$GrpcFuture.setException(ClientCalls.java:515)

     at io.grpc.stub.ClientCalls$UnaryStreamToFuture.onClose(ClientCalls.java:490)

     at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39)

     at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23)

     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:700)

     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:399)

     at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:500)

     at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:65)

     at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.close(ClientCallImpl.java:592)

     at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.access$700(ClientCallImpl.java:508)

     at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:632)

     at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)

     at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)

     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

     at java.util.concurrent.FutureTask.run(FutureTask.java:266)

     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecu

tor.java:180)

     at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java

:293)

     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) Suppressed: com.google.api.gax.rpc.AsyncTaskException: Asynchronous task failed at com.google.api.gax.rpc.ApiExceptions.callAndTranslateApiException(ApiExceptions.java:57)

     at com.google.api.gax.rpc.UnaryCallable.call(UnaryCallable.java:112)

     at com.google.cloud.dialogflow.v2.SessionsClient.detectIntent(SessionsClient.java:245)

     at com.google.cloud.dialogflow.v2.SessionsClient.detectIntent(SessionsClient.java:184)

     .... (skip) ....

     at sun.reflect.GeneratedMethodAccessor60.invoke(Unknown Source)

     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

     at java.lang.reflect.Method.invoke(Method.java:498)

     at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:64)

     at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunn

able.java:53)

     at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)

     ... 7 more

Caused by: io.grpc.StatusRuntimeException: UNAVAILABLE: io exception

     at io.grpc.Status.asRuntimeException(Status.java:533)

     ... 23 more

Caused by: io.grpc.netty.shaded.io.netty.channel.AbstractChannel$AnnotatedNoRouteToHostException: null: dialogflow.googleapis.com/2404:6800:4004:80d:0:0:0:200a:443

     at io.grpc.netty.shaded.io.netty.channel.unix.Errors.throwConnectException(Errors.java:104)

     at io.grpc.netty.shaded.io.netty.channel.unix.Socket.connect(Socket.java:257)

     at io.grpc.netty.shaded.io.netty.channel.epoll.AbstractEpollChannel.doConnect0(AbstractEpollChannel.java:730)

     at io.grpc.netty.shaded.io.netty.channel.epoll.AbstractEpollChannel.doConnect(AbstractEpollChannel.java:715)

     at io.grpc.netty.shaded.io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.connect(AbstractEpollCha

nnel.java:557)

     at io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline$HeadContext.connect(DefaultChannelPipeline.java

:1340)

     at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeConnect(AbstractChannelHandlerCo

ntext.java:532)

     at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.connect(AbstractChannelHandlerContext.

java:517)

     at io.grpc.netty.shaded.io.netty.channel.ChannelDuplexHandler.connect(ChannelDuplexHandler.java:50)

     at io.grpc.netty.shaded.io.grpc.netty.WriteBufferingAndExceptionHandler.connect(WriteBufferingAndExceptionHan

dler.java:136)

     at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeConnect(AbstractChannelHandlerCo

ntext.java:532)

     at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.access$1000(AbstractChannelHandlerCont

ext.java:38)

     at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext$9.run(AbstractChannelHandlerContext.ja

va:522)

     at io.grpc.netty.shaded.io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)

     at io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor

.java:404)

     at io.grpc.netty.shaded.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:333)

     at io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java

:905)

     at io.grpc.netty.shaded.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)

     ... 1

more Caused by: java.net.NoRouteToHostException

     ... 19 more