Misleading error

RT Couldn’t write to session directory ‘/var/rt3/session_data’:
DBD::Pg::st execute failed: execute on disconnected handle at
/usr/lib/perl5/site_perl/5.8.0/Apache/Session/Store/Postgres.pm line 76.

I’m getting that error currently. The ‘/var/rt3/session_data’ is a bit
misleading because I thought session data was stored in the database by
default unless you uncommented
#Set($WebSessionClass , ‘Apache::Session::File’);

I start getting that error when the first ticket is created. I’m still
trying to guess why it’s happening, so if anyone has any guesses on that,
send them my way.