testNativeTransportWithoutEpollOnly test is failing

[dd-haff]

I'm trying to build AsyncHttpClient from source. I've checked it out from GitHub, and have run ./mvnw clean package on my Fedora Workstation. I've used both openjdk 21.0.7 and Oracle JDK 17.0.2 as my system JDK and the results are the same.

The build fails with the error DefaultAsyncHttpClientTest.testNativeTransportWithoutEpollOnly:62 » IllegalState failed to create a child event loop.

I have tried the tip of the main branch as well as several release tags, all result in the same error.

The latest output in async-http-client/client/target/surefire-reports is for the prior successful test (org.asynchttpclient.ws.WebSocketWriteFutureTest).

If I update the top-level pom.xml to exclude <exclude>**/DefaultAsyncHttpClientTest.java</exclude>, the rest of the tests pass successfully.

I've tried disabling my firewalld, and I've looked through my system and logs to see if ulimits or selinux is getting in the way. Nothing leaps out.

Google searches for "testNativeTransportWithoutEpollOnly" and "IllegalState failed to create a child event loop" have not yielded any useful results.

Without a better error message or a test/error log, I'm at a loss to think of next steps other than stepping into a debugger during the test phase. This doesn't seem like it should be necessary if I'm not making changes and am just trying to build the project from source.

Any suggestions?

[hyperxpro]

Sorry, I totally missed this. The error is coming from Netty.

I would suggest creating a Netty EpollEventLoopGroup in your environment and print the stacktrace. I suspect this is coming from the kernel itself.