Closing MAAS task since MAAS just connects to PostgreSQL through tcp
connections.
One correction to my previous statement:
$ sudo lsof / | grep plpgsql.so
postgres 21822 postgres mem REG 252,1 202824 1295136
/usr/lib/postgresql/12/lib/plpgsql.so
postgres 21948 postgres mem REG 252,1 202824 1295136
/usr/lib/postgresql/12/lib/plpgsql.so
^^^ this was a red herring. The direction was the other way around; the
old binary of postgres in memory tried to invoke updated .so on disk in
case process is not restarted after a package update.
$ sudo lsof / | egrep -w 'DEL|deleted' | grep postgres
postgres 21160 postgres txt REG 252,1 8117568 1293956
/usr/lib/postgresql/12/bin/postgres (deleted)
postgres 21163 postgres txt REG 252,1 8117568 1293956
/usr/lib/postgresql/12/bin/postgres (deleted)
postgres 21164 postgres txt REG 252,1 8117568 1293956
/usr/lib/postgresql/12/bin/postgres (deleted)
postgres 21165 postgres txt REG 252,1 8117568 1293956
/usr/lib/postgresql/12/bin/postgres (deleted)
postgres 21166 postgres txt REG 252,1 8117568 1293956
/usr/lib/postgresql/12/bin/postgres (deleted)
postgres 21167 postgres txt REG 252,1 8117568 1293956
/usr/lib/postgresql/12/bin/postgres (deleted)
postgres 21168 postgres txt REG 252,1 8117568 1293956
/usr/lib/postgresql/12/bin/postgres (deleted)
** Changed in: maas
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/1939898
Title:
Unnatended postgresql-12 upgrade caused MAAS internal error
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