Hi,
18.03.2023 07:26, Tom Lane wrote:
Amit Kapila <amit.kapila16@gmail.com> writes:
Peter Smith has recently reported a BF failure [1]. AFAICS, the call
stack of failure [2] is as follows:
Note the assertion report a few lines further up:
TRAP: failed Assert("pg_atomic_read_u32(&entry_ref->shared_entry->refcount) == 0"), File: "pgstat_shmem.c", Line: 560, PID: 25004
This assertion failure can be reproduced easily with the attached patch:
============== running regression test queries ==============
test oldest_xmin ... ok 55 ms
test oldest_xmin ... FAILED (test process exited with exit code 1) 107 ms
test oldest_xmin ... FAILED (test process exited with exit code 1) 8 ms
============== shutting down postmaster ==============
contrib/test_decoding/output_iso/log/postmaster.log contains:
TRAP: failed Assert("pg_atomic_read_u32(&entry_ref->shared_entry->refcount) == 0"), File: "pgstat_shmem.c", Line: 561, PID: 456844
With the sleep placed above Assert(entry_ref->shared_entry->dropped) this Assert fails too.
Best regards,
Alexander