Re: Non-superuser subscription owners

On Sat, Apr 1, 2023 at 12:00 PM Alexander Lakhin <exclusion@gmail.com> wrote:
> I've managed to reproduce it using the following script:
> for ((i=1;i<=10;i++)); do
> echo "iteration $i"
> echo "
> CREATE ROLE sub_user;
> CREATE SUBSCRIPTION testsub CONNECTION 'dbname=db'
>   PUBLICATION testpub WITH (connect = false);
> ALTER SUBSCRIPTION testsub ENABLE;
> DROP SUBSCRIPTION testsub;
> SELECT pg_sleep(0.001);
> DROP ROLE sub_user;
> " | psql
> psql -c "ALTER SUBSCRIPTION testsub DISABLE;"
> psql -c "ALTER SUBSCRIPTION testsub SET (slot_name = NONE);"
> psql -c "DROP SUBSCRIPTION testsub;"
> grep 'TRAP' server.log && break
> done

After a bit of experimentation this repro worked for me -- I needed
-DRELCACHE_FORCE_RELEASE as well, and a bigger iteration count. I
verified that the patch fixed it, and committed the patch with the
addition of a comment.

Thanks very much for this repro, and likewise many thanks to Hou
Zhijie for the report and patch.

--
Robert Haas
EDB: http://www.enterprisedb.com