Failed ALPN negotiation: Unable to find compatible protocol

[utsukprani]

I have created a very simple spring boot application. I am trying to call my bot from my spring boot application (RestController). I am behind my company's firewall.

OS - Windows 10 964 bit) Java - 9.0.4 Spring Boot - 2.3.1.RELEASE

However I am getting the below exception when I run my application. is there a way I can fix this issue as this has really halted my progress. I am also attaching the -

• pom.xml

• java code

`2020-07-11 03:49:37.329 INFO 20704 --- [nio-8080-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet' 2020-07-11 03:49:37.329 INFO 20704 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet' 2020-07-11 03:49:37.343 INFO 20704 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet : Completed initialization in 13 ms Input - [will it rain in Japan tomorrow] Session Path: projects/myweatherbot-mplvfh/agent/sessions/cdfc8b0f-b3c5-4594-9eef-3640b43c3660 2020-07-11 03:49:43.355 ERROR 20704 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is com.google.api.gax.rpc.UnavailableException: io.grpc.StatusRuntimeException: UNAVAILABLE: Failed ALPN negotiation: Unable to find compatible protocol Channel Pipeline: [HttpProxyHandler$HttpClientCodecWrapper#0, HttpProxyHandler#0, SslHandler#0, ProtocolNegotiators$ClientTlsHandler#0, WriteBufferingAndExceptionHandler#0, DefaultChannelPipeline$TailContext#0]] with root cause

io.grpc.StatusRuntimeException: UNAVAILABLE: Failed ALPN negotiation: Unable to find compatible protocol Channel Pipeline: [HttpProxyHandler$HttpClientCodecWrapper#0, HttpProxyHandler#0, SslHandler#0, ProtocolNegotiators$ClientTlsHandler#0, WriteBufferingAndExceptionHandler#0, DefaultChannelPipeline$TailContext#0] at io.grpc.Status.asRuntimeException(Status.java:533) ~[grpc-api-1.30.2.jar:1.30.2] at io.grpc.stub.ClientCalls$UnaryStreamToFuture.onClose(ClientCalls.java:515) ~[grpc-stub-1.30.2.jar:1.30.2] at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:426) ~[grpc-core-1.30.2.jar:1.30.2] at io.grpc.internal.ClientCallImpl.access$500(ClientCallImpl.java:66) ~[grpc-core-1.30.2.jar:1.30.2] at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.close(ClientCallImpl.java:689) ~[grpc-core-1.30.2.jar:1.30.2] at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.access$900(ClientCallImpl.java:577) ~[grpc-core-1.30.2.jar:1.30.2] at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:751) ~[grpc-core-1.30.2.jar:1.30.2] at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:740) ~[grpc-core-1.30.2.jar:1.30.2] at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37) ~[grpc-core-1.30.2.jar:1.30.2] at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123) ~[grpc-core-1.30.2.jar:1.30.2] at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514) ~[na:na] at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na] at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:299) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) ~[na:na] at java.base/java.lang.Thread.run(Thread.java:844) [na:na] ` demo.zip

[utsukprani]

Hi, Any help or suggestions ?

[utsukprani]

Hi, I even enabled the 8443 connector in the server.xml to support h2. But still I am getting the error. Can someone please suggest why I am getting ALPN error when calling the Google dialogflow api ?