cf-natali commented on a change in pull request #355: Handle EBUSY when destroying a cgroup. URL: https://github.com/apache/mesos/pull/355#discussion_r405042359
########## File path: src/linux/cgroups.cpp ########## @@ -696,13 +696,24 @@ Try<Nothing> remove(const string& hierarchy, const string& cgroup) string path = path::join(hierarchy, cgroup); // Do NOT recursively remove cgroups. - Try<Nothing> rmdir = os::rmdir(path, false); - if (rmdir.isError()) { - return Error( + // TODO The retry was added as a fix for kernel bug + // https://lkml.org/lkml/2020/1/15/1349 + // where calling rmdir on a seemingly empty cgroup can fail + // with EBUSY while some tasks are exiting. + auto delay = Milliseconds(1); + for (auto retry = 10; ;) { + Try<Nothing> rmdir = os::rmdir(path, false); + if (!rmdir.isError()) { + return rmdir; + } else if (retry > 0) { + os::sleep(delay); Review comment: Ah, I hadn't realised that `loop` actually called the lambda multiple times, I thought it was copying it every time - makes sense, and pretty neat. I'll finish, thanks! ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services