Returing a file from Quarkus REST endpoint with Uni leads to Vert.x error now that Vert.x Pump was replaced

[michalvavrik]

Describe the bug

I have a REST endpoint like this:

@GET
    @Path("/download")
    public Uni<File> download() {
        return Uni.createFrom().item(file);
    }

After #45538 my request to this endpoint hangs.

Expected behavior

Works.

Actual behavior

Request hangs and following error is logged:

20:01:42,622 INFO  [app] 20:01:42,281 Uncaught exception received by Vert.x: java.lang.IllegalStateException: File handle is closed
20:01:42,623 INFO  [app] 	at io.vertx.core.file.impl.AsyncFileImpl.checkClosed(AsyncFileImpl.java:550)
20:01:42,624 INFO  [app] 	at io.vertx.core.file.impl.AsyncFileImpl.doFlush(AsyncFileImpl.java:448)
20:01:42,625 INFO  [app] 	at io.vertx.core.file.impl.AsyncFileImpl.flush(AsyncFileImpl.java:335)
20:01:42,625 INFO  [app] 	at org.jboss.resteasy.reactive.client.handlers.ClientSendRequestHandler$3$2$1$1.handle(ClientSendRequestHandler.java:314)
20:01:42,626 INFO  [app] 	at org.jboss.resteasy.reactive.client.handlers.ClientSendRequestHandler$3$2$1$1.handle(ClientSendRequestHandler.java:311)
20:01:42,626 INFO  [app] 	at io.vertx.core.impl.future.FutureImpl$4.onSuccess(FutureImpl.java:176)
20:01:42,627 INFO  [app] 	at io.vertx.core.impl.future.FutureBase.lambda$emitSuccess$0(FutureBase.java:60)
20:01:42,627 INFO  [app] 	at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173)
20:01:42,628 INFO  [app] 	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166)
20:01:42,628 INFO  [app] 	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472)
20:01:42,629 INFO  [app] 	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:569)
20:01:42,629 INFO  [app] 	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
20:01:42,630 INFO  [app] 	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
20:01:42,630 INFO  [app] 	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
20:01:42,631 INFO  [app] 	at java.base/java.lang.Thread.run(Thread.java:1583)

How to Reproduce?

Steps to reproduce the behavior:

1. git clone git@github.com:quarkus-qe/quarkus-test-suite.git
2. cd quarkus-test-suite/http/rest-client-reactive
3. mvn clean verify -Dit.test=LargeFileHandlingIT

Output of uname -a or ver

Fedora 41

Output of java -version

Temurin 21 and 17

Quarkus version or git rev

999-SNAPSHOT

Build tool (ie. output of mvnw --version or gradlew --version)

No response

Additional information

No response

[michalvavrik]

cc @geoand

[geoand]

Thanks, I'll have a look

[geoand]

#45630 fixes the issue

[michalvavrik]

#45630 fixes the issue

thanks for quick fix

[geoand]

Thanks for spotting the issue!