Bug 136674

Gnome session hangs trying to create a client ID if you are connected
to a network and can't contact a nameserver.  For example, connect to
vpnonly and don't bring up the VPN.

Start gedit, gedit never starts

Gedit backtrace during hang:
#0  0xf6fe9782 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1  0xf6f4e4b3 in __read_nocancel () from /lib/tls/libpthread.so.0
#2  0xf6fc6f29 in _IceTransFreeConnInfo () from /usr/X11R6/lib/libICE.so.6
#3  0xf6fc7375 in _IceTransRead () from /usr/X11R6/lib/libICE.so.6
#4  0xf6fbf2c9 in _IceRead () from /usr/X11R6/lib/libICE.so.6
#5  0xf6fbf857 in IceProcessMessages () from /usr/X11R6/lib/libICE.so.6
#6  0xf6fc471a in IceProtocolSetup () from /usr/X11R6/lib/libICE.so.6
#7  0xf6fd2250 in SmcOpenConnection () from /usr/X11R6/lib/libSM.so.6
#8  0x0368cdf7 in gnome_client_connect () from /usr/lib/libgnomeui-2.so.0
#9  0x0368cf34 in gnome_client_new () from /usr/lib/libgnomeui-2.so.0
#10 0x0361ae2e in gnome_program_postinit () from /usr/lib/libgnome-2.so.0
#11 0x0361b1d6 in gnome_program_postinit () from /usr/lib/libgnome-2.so.0
#12 0x0361b50f in gnome_program_init () from /usr/lib/libgnome-2.so.0
#13 0x0805fd2b in main ()


The client is stuck attempting to read from the session manager, which
is stuck trying to look up its address forever.

Gnome-session backtrace during hang:
#0  0xf6fe9782 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1  0xf6a3b52d in poll () from /lib/tls/libc.so.6
#2  0xf691391c in __libc_res_nsend () from /lib/libresolv.so.2
#3  0xf6912073 in __libc_res_nquery () from /lib/libresolv.so.2
#4  0xf6912338 in __libc_res_nquerydomain () from /lib/libresolv.so.2
#5  0xf691289e in __libc_res_nsearch () from /lib/libresolv.so.2
#6  0xf66b32de in _nss_dns_gethostbyname3_r () from /lib/libnss_dns.so.2
#7  0xf66b3533 in _nss_dns_gethostbyname2_r () from /lib/libnss_dns.so.2
#8  0xf6a2d2a2 in gaih_inet () from /lib/tls/libc.so.6
#9  0xf6a2e591 in getaddrinfo () from /lib/tls/libc.so.6
#10 0xf6f011e5 in SmsGenerateClientID () from /usr/X11R6/lib/libSM.so.6
#11 0x0805267d in start_clients ()
#12 0xf6f0383a in _SmsProcessMessage () from /usr/X11R6/lib/libSM.so.6
#13 0xf6eed99d in IceProcessMessages () from /usr/X11R6/lib/libICE.so.6
#14 0x03663a9f in gnome_href_set_label () from /usr/lib/libgnomeui-2.so.0
#15 0x009d5907 in g_vasprintf () from /usr/lib/libglib-2.0.so.0
#16 0x009b174b in g_main_context_dispatch () from
/usr/lib/libglib-2.0.so.0
#17 0x009b31d2 in g_main_context_acquire () from /usr/lib/libglib-2.0.so.0
#18 0x009b347f in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#19 0xf6d0278e in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#20 0x0805497b in main ()


The problem is in frame "#10 0xf6f011e5 in SmsGenerateClientID ()",
where gnome-session keeps trying to get a client id based on your
hostname or something.  Why the does the SM need something as fragile
as the hostname, and why does it need to do any lookups on it?