Describe the feature

Sometimes a test fails as in https://github.com/eclipse-vertx/vert.x/actions/runs/21748041651/job/62738721196 with the message:

Error:  Failures: 
Error:    Http2ServerTest.testNetSocketSendFile *** Open file descriptor open file descriptors average 442 > 439

It would be helpful to include lsof information.

Contribution

I'll create a PR