[Catalyst] Catalyst/Starman server Cache::FastMmap problems when running with --background option on CentOS 6

[Robert Rothenberg]

I've changed a Catalyst application to use FastMmap session stores instead
of Files, because I am using OpenID which already requires it.

All tests pass, and the server runs fine manually:

  sudo -u myappuser /opt/perl/bin/perl -I /opt/myapp/lib/perl5
/opt/myapp/bin/myapp_server.pl -d --host 127.0.0.1 --port 3001 --keepalive
--fork --pidfile /var/opt/myapp/run/starman.pid

But when run it with the --background option, it fails with the error:

  Caught exception in engine "Lock failed: Bad file descriptor at
/opt/myapp/lib/perl5/i686-linux/Cache/FastMmap.pm line 1189." <at
/opt/myapp/lib/perl5/Catalyst.pm line 1968>

I am using CentOS 6.2 (2.6.32-220.el6.i686).

I can't seem to find anything about this error by Googling. Any idea what
the problem could be?