Hi,
I'm using sssd-1.7.0-5.fc16.x86_64 and during my sssd startup I see this output:

[cut]
(Tue Feb  7 10:25:16 2012) [sssd] [mark_service_as_started] (0x0100): Now starting services!
(Tue Feb  7 10:25:16 2012) [sssd] [start_service] (0x0100): Queueing service nss for startup
(Tue Feb  7 10:25:16 2012) [sssd] [start_service] (0x0100): Queueing service pam for startup
(Tue Feb  7 10:25:16 2012) [sssd[be[my_ldap]]] [sbus_toggle_watch] (0x4000): 0x7f0043097590/0x7f004309c2a0 (17), -/W (disabled)
(Tue Feb  7 10:25:16 2012) [sssd[be[my_ldap]]] [sbus_remove_timeout] (0x2000): 0x7f004309a510
(Tue Feb  7 10:25:16 2012) [sssd[be[my_ldap]]] [sbus_dispatch] (0x4000): dbus conn: 7F0043099BF0
(Tue Feb  7 10:25:16 2012) [sssd[be[my_ldap]]] [sbus_dispatch] (0x4000): Dispatching.
(Tue Feb  7 10:25:16 2012) [sssd[be[my_ldap]]] [id_callback] (0x0100): Got id ack and version (1) from Monitor
(Tue Feb  7 10:25:16 2012) [sssd] [service_startup_handler] (0x0010): Could not exec sssd_nss, reason: No such file or directory
(Tue Feb  7 10:25:16 2012) [sssd] [service_startup_handler] (0x0010): (Tue Feb  7 10:25:16 2012) [sssd] [mt_svc_exit_handler] (0x0040): Child [nss] exited with code [1]
(Tue Feb  7 10:25:16 2012) [sssd] [start_service] (0x0100): Could not exec sssd_pam, reason: No such file or directory
Queueing service nss for startup
(Tue Feb  7 10:25:16 2012) [sssd] [service_startup_handler] (0x0010): (Tue Feb  7 10:25:16 2012) [sssd] [mt_svc_exit_handler] (0x0040): Child [pam] exited with code [1]
(Tue Feb  7 10:25:16 2012) [sssd] [start_service] (0x0100): Could not exec sssd_nss, reason: No such file or directory
Queueing service pam for startup
(Tue Feb  7 10:25:16 2012) [sssd] [service_startup_handler] (0x0010): (Tue Feb  7 10:25:16 2012) [sssd] [mt_svc_exit_handler] (0x0040): Child [nss] exited with code [1]
(Tue Feb  7 10:25:16 2012) [sssd] [start_service] (0x0100): Queueing service nss for startup
Could not exec sssd_pam, reason: No such file or directory
(Tue Feb  7 10:25:16 2012) [sssd] [service_startup_handler] (0x0010): (Tue Feb  7 10:25:16 2012) [sssd] [mt_svc_exit_handler] (0x0040): Could not exec sssd_nss, reason: No such file or directory
Child [pam] exited with code [1]
(Tue Feb  7 10:25:16 2012) [sssd] [start_service] (0x0100): Queueing service pam for startup
(Tue Feb  7 10:25:16 2012) [sssd] [mt_svc_exit_handler] (0x0040): Child [nss] exited with code [1]
(Tue Feb  7 10:25:16 2012) [sssd] [start_service] (0x0100): Queueing service nss for startup
(Tue Feb  7 10:25:16 2012) [sssd] [service_startup_handler] (0x0010): Could not exec sssd_pam, reason: No such file or directory
(Tue Feb  7 10:25:16 2012) [sssd] [mt_svc_exit_handler] (0x0040): Child [pam] exited with code [1]
(Tue Feb  7 10:25:16 2012) [sssd] [start_service] (0x0100): Queueing service pam for startup
(Tue Feb  7 10:25:16 2012) [sssd] [service_startup_handler] (0x0010): Could not exec sssd_nss, reason: No such file or directory
(Tue Feb  7 10:25:16 2012) [sssd] [mt_svc_exit_handler] (0x0040): Child [nss] exited with code [1]
(Tue Feb  7 10:25:16 2012) [sssd] [mt_svc_exit_handler] (0x0010): Process [nss], definitely stopped!
(Tue Feb  7 10:25:16 2012) [sssd] [service_startup_handler] (0x0010): Could not exec sssd_pam, reason: No such file or directory
(Tue Feb  7 10:25:16 2012) [sssd] [mt_svc_exit_handler] (0x0040): Child [pam] exited with code [1]
(Tue Feb  7 10:25:16 2012) [sssd] [mt_svc_exit_handler] (0x0010): Process [pam], definitely stopped!
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[root@fedora16 sssd]# locate sssd_pam
/usr/lib/debug/usr/libexec/sssd/sssd_pam.debug
/usr/libexec/sssd/sssd_pam

[root@fedora16 sssd]# locate sssd_nss
/usr/lib/debug/usr/libexec/sssd/sssd_nss.debug
/usr/libexec/sssd/sssd_nss

Could you help me in finding the problem?

Thanks a lot
    Marco

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Non è forte chi non cade, ma chi cadendo ha la forza di rialzarsi.
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