On product side of the ASTS Core TS, we experienced issue with Too many open files errors showed in log JBEAP-25319. Switching from the surefire's default STDOUT communication channel to TCP/IP solved the issue for us. TBH we didn't investigate deeply so we think that the reason for such error was that something (test or some plugin) wrote to STDOUT which affected surefire leaving many open file descriptors. Switching to TCP/IP should avoid such situation also in the future.

Truth is that we didn't hit same issue with the WildFly Core upstream so far - thus this Jira is marked as an enhancement. Still, I believe it is beneficial to switch the communication to TCP/IP.