On Fri, 29 Aug 2025 09:00:20 GMT, Stefan Karlsson <stef...@openjdk.org> wrote:
>> While investigating >> [JDK-8260555](https://bugs.openjdk.org/browse/JDK-8260555), which lowers the >> timeout factor from 4 to 1, we found that FDLeakTest sometimes times out on >> Linux. >> >> The reason is that the test performs a `fcntl` call for each and every >> potential file descriptor number. This can be a large number of calls and >> sometimes results in minutes-long test executions. >> >> I propose that we fix this by limiting the max number of open file >> descriptors. This lowers the test execution time to about 1 second. >> >> The test has two processes. One that executes the libFDLeaker.c code below >> as an agent in the test JVM, then it forks into a exeFDLeakTester.c, which >> reads the property `int max_fd = (int)sysconf(_SC_OPEN_MAX);`. The setting >> of `RLIMIT_NOFILE` to `100` lowers `max_fd` to `100`. I've verified this on >> both Linux and on macOS. >> >> I've run the test manually on Linux and macOS and verified that it runs >> faster. I've also run this through tier1. > > Stefan Karlsson has updated the pull request incrementally with one > additional commit since the last revision: > > Add error logging Good, thanks! ------------- Marked as reviewed by stuefe (Reviewer). PR Review: https://git.openjdk.org/jdk/pull/26979#pullrequestreview-3168592578
