In the course of upgrading a bunch of database clusters from 10 to 14 using pg_upgrade tool, some databases result in the following error recorded in pg_upgrade_dump_1.log, such that cluster upgrade fails. FATAL: password authentication failed for user "postgres"
This error happens on the restoration-side (Pg14)
pg_restore: error: connection to server at "localhost" (::1), port 50432 failed: FATAL: password authentication failed for user "postgres"
means that you try to use ipv6 (is it possible, according to your target postgresql.conf file?)
Does your Pg14 target pg_hba.conf file allow this kind of connection?
Last year, I had to migrate 200+ PostgreSQL instance from Pg9.5 to Pg12, I discovered some configuration differences while performing this kind of pre-upgrade tests.
This was done on Microsoft Windows 11. PostgreSQL 10 and 14 used are built using Visual Studio 2015. Only a small number of database clusters has this problem, around 2 of 200. It appears these database are used from earlier cluster upgrade from 9.4 to 10 as well.
It would be very helpful if there is any possible workaround to overcome this problem.
I attached a sample pg_upgrade_dump_1.log reported this error.
