Robert Haas wrote: > On Thu, Mar 29, 2018 at 5:51 PM, Andres Freund <and...@anarazel.de> wrote: > >> > 2018-03-06 13:20:24.391 GMT [14869] ERROR: epoll_ctl() failed: Bad file > >> > descriptor > >> > >> I can confirm this bug exists in single-user mode. > > > > I'm not sure we need to do anything about this, personally. This seems > > like a fairly rare thing to do in a mode that's definitely not intended > > to be general purpose. > > Mmmph. I don't really think it's possible to view a user-visible > EBADF as anything other than a coding error.
IMO the problem is not the user-visible EBADF -- the problem is that the user might be attempting to clean up from some previous mistake by removing a replication slot. Using single-user mode might be a strange tool, but it's not completely unreasonable. Is it really all that difficult to fix slot acquisition for it? I agree with Tom that for any other operation we can just reject it early if not under postmaster, but dropping a slot seems a special case. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
