El día lunes, octubre 05, 2020 a las 04:49:27p. m. +0200, Mario Emmenlauer escribió: > On 05.10.20 13:22, Mario Emmenlauer wrote: > > I've used PostgreSQL since version 9.x successfully on Linux, macOS > > and Windows. Today I've upgraded from 12.3 to 13.0 and suddenly I can > > not start the server any more on Ubuntu 20.04 (inside Docker on Ubuntu > > 18.04) and on macOS 10.15. > > > > I get reproducibly the error: > > 2020-10-05 11:48:19.720 CEST [84731] WARNING: dup(0) failed after 0 successes: Bad file descriptor > > 2020-10-05 11:48:19.720 CEST [84731] FATAL: insufficient file descriptors available to start server process > > 2020-10-05 11:48:19.720 CEST [84731] DETAIL: System allows 0, we need at least 58. > > 2020-10-05 11:48:19.720 CEST [84731] LOG: database system is shut down > > > > ... Can you try to catch the situation starting the server under strace, perhaps with '-f' to follow childs. And look into the output ('-o outfile') for the failing syscall. matthias -- Matthias Apitz, ✉ guru@xxxxxxxxxxx, http://www.unixarea.de/ +49-176-38902045 Public GnuPG key: http://www.unixarea.de/key.pub Без книги нет знания, без знания нет коммунизма (Влaдимир Ильич Ленин) Without books no knowledge - without knowledge no communism (Vladimir Ilyich Lenin) Sin libros no hay saber - sin saber no hay comunismo. (Vladimir Ilich Lenin)