Christophe Pettus <xof@xxxxxxxxxxxx> writes: > On May 13, 2024, at 11:17, Tom Lane <tgl@xxxxxxxxxxxxx> wrote: >> What's causing that I can't say. It doesn't look like we log the >> errno anywhere when failing to read a zone file :-( > File descriptor exhaustion? (Of course, that would mean something somewhere is leaking them, which is another problem.) Since this is in a pretty-new process, it would have to be global FD exhaustion, that is ENFILE not EMFILE. (Assuming macOS even has that concept; its BSD roots sure do, but who knows what Apple's done to it over the years.) You'd likely have seen more side-effects of such a condition. I was wondering more about permissions checks gone wrong, comparable to the antivirus-induced misbehaviors we hear about on Windows. Not that that's a comforting answer. regards, tom lane