Classcast Exception calling ServletFilter with HTTP/2

[bcluap]

Describe the bug
Get a classcast exception when calling a Servlet filter with HTTP/2

Expected behavior
Works same as HTTP/1.1

Actual behavior
Throws exception:

2020-04-16 14:27:27,293 ERROR [io.qua.ver.htt.run.QuarkusErrorHandler] (vert.x-eventloop-thread-7) HTTP Request to / failed, error id: f5edbcea-f7fa-45fe-91ba-0d50949eb2a3-1: java.lang.ClassCastException: class io.vertx.core.http.impl.Http2ServerConnection cannot be cast to class io.vertx.core.http.impl.Http1xServerConnection (io.vertx.core.http.impl.Http2ServerConnection and io.vertx.core.http.impl.Http1xServerConnection are in unnamed module of loader 'app')
	at io.undertow.vertx.VertxHttpExchange.<init>(VertxHttpExchange.java:199)
	at io.quarkus.undertow.runtime.UndertowDeploymentRecorder$6.handle(UndertowDeploymentRecorder.java:363)
	at io.quarkus.undertow.runtime.UndertowDeploymentRecorder$6.handle(UndertowDeploymentRecorder.java:358)
	at io.vertx.ext.web.impl.RouteState.handleContext(RouteState.java:1034)
	at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:131)
	at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:130)
	at io.vertx.ext.web.impl.RouterImpl.handle(RouterImpl.java:54)
	at io.vertx.ext.web.impl.RouterImpl.handle(RouterImpl.java:36)
	at io.quarkus.vertx.http.runtime.VertxHttpRecorder$7.handle(VertxHttpRecorder.java:334)
	at io.quarkus.vertx.http.runtime.VertxHttpRecorder$7.handle(VertxHttpRecorder.java:331)
	at io.quarkus.vertx.http.runtime.VertxHttpRecorder$1.handle(VertxHttpRecorder.java:112)
	at io.quarkus.vertx.http.runtime.VertxHttpRecorder$1.handle(VertxHttpRecorder.java:103)
	at io.vertx.core.impl.ContextImpl.executeTask(ContextImpl.java:369)
	at io.vertx.core.impl.EventLoopContext.execute(EventLoopContext.java:43)
	at io.vertx.core.impl.ContextImpl.executeFromIO(ContextImpl.java:232)
	at io.vertx.core.http.impl.Http2ServerConnection.onHeadersRead(Http2ServerConnection.java:136)
	at io.vertx.core.http.impl.Http2ServerConnection.onHeadersRead(Http2ServerConnection.java:149)
	at io.vertx.core.http.impl.VertxHttp2ConnectionHandler.channelRead(VertxHttp2ConnectionHandler.java:411)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
	at io.vertx.core.http.impl.Http1xUpgradeToH2CHandler.channelRead(Http1xUpgradeToH2CHandler.java:95)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
	at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:321)
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:295)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
	at io.vertx.core.http.impl.Http1xOrH2CHandler.end(Http1xOrH2CHandler.java:61)
	at io.vertx.core.http.impl.Http1xOrH2CHandler.channelRead(Http1xOrH2CHandler.java:38)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
	at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Thread.java:834)

To Reproduce
Steps to reproduce the behavior:

1. git clone https://github.com/bcluap/http2test
2. cd http2test
3. mvn clean install
4. java -jar ./target/http2filter-1.0-SNAPSHOT-runner.jar
5. curl http://0.0.0.0:8080/ -> Works
6. curl --http2 http://0.0.0.0:8080/ -> Throws exception

Configuration

Empty properties file

Screenshots

Environment (please complete the following information):

• Output of uname -a or ver: Linux PCBLaptop 4.15.0-74-generic Change to use an injection based API along with the build tool to man… #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
• Output of java -version: openjdk version "11.0.6" 2020-01-14
• GraalVM version (if different from Java):
• Quarkus version or git rev: 1.4.0.CR1
• Build tool (ie. output of mvnw --version or gradlew --version): maven

Additional context

[gsmet]

/cc @stuartwdouglas