Hi > Do you think that plausibly explains and resolves symptoms of bug#15585, too?
I think yes. Bug#15585 raised only after "dsa_area could not attach to segment" in different parallel worker. Leader stuck because waiting all parallel workers, but one worker has unexpected recursion in dsm_backend_shutdown [1] and will never shutdown. Backtrace show previous error in this backend: "cannot unpin a segment that is not pinned" - root cause is earlier and in a different process. * https://www.postgresql.org/message-id/70942611548327380%40myt6-7734411c649e.qloud-c.yandex.net regards, Sergei
