Failed to bind exception when running tests

[zbhavyai]

Hello,

I generated a sample code as given in the Google cloud functions guide. Then I added a dependency for quarkus-rest-jackson. No code changes were made. When running tests using ./mvnw clean test, I get the below Failed to bind exception for all three sample test cases:

[ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 2.462 s <<< FAILURE! -- in org.acme.googlecloudfunctions.HelloWorldCloudEventsFunctionTest
[ERROR] org.acme.googlecloudfunctions.HelloWorldCloudEventsFunctionTest.testAccept -- Time elapsed: 0.001 s <<< ERROR!
org.junit.jupiter.api.extension.TestInstantiationException: Failed to create test instance
        at io.quarkus.test.junit.QuarkusTestExtension.initTestState(QuarkusTestExtension.java:788)
        at io.quarkus.test.junit.QuarkusTestExtension.interceptTestClassConstructor(QuarkusTestExtension.java:754)
        at java.base/java.util.Optional.orElseGet(Optional.java:364)
        at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
        at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
Caused by: java.lang.RuntimeException: java.io.IOException: Failed to bind to 0.0.0.0/0.0.0.0:8081
        at io.quarkus.google.cloud.functions.test.CloudFunctionTestResource.inject(CloudFunctionTestResource.java:40)
        at io.quarkus.test.common.TestResourceManager.inject(TestResourceManager.java:166)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at io.quarkus.test.junit.QuarkusTestExtension.createActualTestInstance(QuarkusTestExtension.java:799)
        at io.quarkus.test.junit.QuarkusTestExtension.initTestState(QuarkusTestExtension.java:782)
        ... 4 more
Caused by: java.io.IOException: Failed to bind to 0.0.0.0/0.0.0.0:8081
        at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:349)
        at org.eclipse.jetty.server.ServerConnector.open(ServerConnector.java:310)
        at org.eclipse.jetty.server.AbstractNetworkConnector.doStart(AbstractNetworkConnector.java:80)
        at org.eclipse.jetty.server.ServerConnector.doStart(ServerConnector.java:234)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at org.eclipse.jetty.server.Server.doStart(Server.java:401)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:73)
        at com.google.cloud.functions.invoker.runner.Invoker.startServer(Invoker.java:324)
        at com.google.cloud.functions.invoker.runner.Invoker.startTestServer(Invoker.java:276)
        at io.quarkus.google.cloud.functions.test.CloudFunctionsInvoker.start(CloudFunctionsInvoker.java:26)
        at io.quarkus.google.cloud.functions.test.CloudFunctionTestResource.inject(CloudFunctionTestResource.java:38)
        ... 8 more
Caused by: java.net.BindException: Address already in use
        at java.base/sun.nio.ch.Net.bind0(Native Method)
        at java.base/sun.nio.ch.Net.bind(Net.java:555)
        at java.base/sun.nio.ch.ServerSocketChannelImpl.netBind(ServerSocketChannelImpl.java:337)
        at java.base/sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:294)
        at java.base/sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:89)
        at org.eclipse.jetty.server.ServerConnector.openAcceptChannel(ServerConnector.java:344)
        ... 18 more

I have already verified that the port 8081 isn't used by any other application (using sudo netstat -tunlp). I still tried using a random test port by modifying the application.properties file, but it doesn't seem to help.

All I can tell after some digging is that transitive dependency quarkus-vertx-http seems to be causing this issue. One good thing is that this sample application runs just fine once built using -DskipTests.

Could somebody please help me here? I made a small reproducer which is available at https://github.com/zbhavyai/quarkus-failed-to-bind-reproducer. I am using Quarkus 3.11.1 with JDK 17.0.11 on Fedora Workstation 40.

Thank you.