Strange port in pg_upgrade output

On 06/12/2017 02:07 PM, armand pirvu wrote:

Hi

I was doing a test upgrade from 9.5 to 9.6 and the following lines caught my eye

postgres 10967 10911 0 15:59 pts/0 00:00:00 /usr/pgsql-9.6/bin/pg_upgrade -d /var/lib/pgsql/9.5/data -D /var/lib/pgsql/9.6/data -b /usr/pgsql-9.5/bin -B /usr/pgsql-9.6/bin -k -v
postgres 11141 1 0 16:00 pts/0 00:00:00 /usr/pgsql-9.6/bin/postgres -D /var/lib/pgsql/9.6/data -p 50432 -b -c synchronous_commit=off -c fsync=off -c full_page_writes=off -c listen_addresses= -c unix_socket_permissions=0700 -c unix_so
postgres 11160 10967 0 16:00 pts/0 00:00:00 sh -c "/usr/pgsql-9.6/bin/pg_restore" --host '/var/lib/pgsql' --port 50432 --username 'postgres' --exit-on-error --verbose --dbname 'dbname=birstdb' "pg_upgrade_dump_25288.custom" >> "pg_upgrad
postgres 11161 11160 6 16:00 pts/0 00:00:00 /usr/pgsql-9.6/bin/pg_restore --host /var/lib/pgsql --port 50432 --username postgres --exit-on-error --verbose --dbname dbname=birstdb pg_upgrade_dump_25288.custom

sudo grep -i port /var/lib/pgsql/9.6/data/postgresql.conf
[sudo] password for armandp:
port = 5432 # (change requires restart)
# supported by the operating system:

Is it something that I missed or is it intentionally using a non default port to avoid unintended client connections ?

https://www.postgresql.org/docs/9.6/static/pgupgrade.html

"Obviously, no one should be accessing the clusters during the upgrade.
pg_upgrade defaults to running servers on port 50432 to avoid unintended
client connections. You can use the same port number for both clusters
when doing an upgrade because the old and new clusters will not be
running at the same time. However, when checking an old running server,
the old and new port numbers must be different."

Thanks
Armand

--
Adrian Klaver
adrian.klaver@aklaver.com

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Got it

Thank you