BUG #6347: Reopening bug #6085

The following bug has been logged on the website:

Bug reference:      6347
Logged by:          Alexander Fortin
Email address:      alexander.fortin@gmail.com
PostgreSQL version: 9.1.2
Operating system:   Ubuntu 10.04.3
Description:=20=20=20=20=20=20=20=20

Hi folks. I'm testing 9.1.2 (source compiled) pg_upgrade (upgrading from
8.4.9) and it seems that the problem exposed in bug #6085 is still there. In
my case, the only way to make pg_upgrade work is to actually force
unix_socket_directory =3D '/tmp/' for the 8.4.9 cluster.

Running in verbose mode
Performing Consistency Checks on Old Live Server
------------------------------------------------
Checking current, bin, and data directories                 ok
Checking cluster versions                                   ok
connection to database failed: could not connect to server: No such file or
directory
        Is the server running locally and accepting
        connections on Unix domain socket "/tmp/.s.PGSQL.5432"?