On Fri, Apr 9, 2021 at 3:40 PM Tom Lane <t...@sss.pgh.pa.us> wrote: > Buildfarm members spurfowl[1] and thorntail[2] have each shown $SUBJECT > once in the past two days. The circumstances are not quite the same; > spurfowl's failure is in autovacuum while thorntail's is in a manual > VACUUM command. Still, it seems clear that there's a recently-introduced > bug here somewhere. I don't see any obvious candidate for the culprit, > though. Any ideas?
They're both VACUUM ANALYZE. They must be, because the calls to visibilitymap_clear PANIC (they don't ERROR) -- the failing visibilitymap_clear() call must occur inside a critical section, and all such calls are made within heapam.c (only VACUUM ANALYZE uses a transaction and does writes). It cannot be the two calls to visibilitymap_clear() inside vacuumlazy.c. I suspect that you've figured this much already. Just pointing it out. -- Peter Geoghegan
