The following bug has been logged on the website:
Bug reference: 7815
Logged by: George Machitidze
Email address: giomac(at)gmail(dot)com
PostgreSQL version: 9.2.2
Operating system: Fedora 18 Linux
Description:
https://bugzilla.redhat.com/show_bug.cgi?id=896161
Upgrading PostgreSQL from 9.1 to 9.2 with pg_upgrade/postgreql-setup fails
with invalid message "There seems to be a postmaster servicing the old
cluster". Looks like pg_upgrade is checking pid file too early without
waiting for master process to exit:
open("/var/lib/pgsql/data-old/postmaster.pid", O_RDONLY) = 5