On 2026-Sep-13, Nikolay Samokhvalov wrote: > Hi hackers, > > On REL_19_STABLE at 6bc236c8, my automated (AI) harness reproduced a > worker startup failure 3/3 times in each of two clusters. Start a > disposable postmaster with a low RLIMIT_NPROC, open the leader connection, > exceed that limit with same-UID helper processes, then run > `repack (concurrently) t`. > > The postmaster logs `could not fork background worker process: Resource > temporarily unavailable`.
Hmm, this sounds related to the report here https://www.postgresql.org/message-id/flat/CALj2ACVAxA9HxvFe8HSspTJ-UO4Aoz%3DkuQdZBeLrod0gqUxH3g%40mail.gmail.com I tried your isolation test against Bharath's patch, and I see that the error condition is reported correctly. I haven't reviewed that patch. I'll review that for push, maybe together with your proposed test addition. Thanks! -- Álvaro Herrera PostgreSQL Developer — https://www.EnterpriseDB.com/
