Hi,

Running centos 6 with sssd-1.8.0-32.el6.x86_64 and sssd-client-1.8.0-32.el6.x86_64.

This particular problem seems to pop now and then. I looked thru the maillist/googled and there seems to be number of posts with similar symptoms, but didnt see exact bug number or recommended actions to resolve this issue. 
Could you advise please?  The problem resolved after restarting sssd. 

sssd.log
(Tue Jul 29 16:46:06 2014) [sssd] [mt_svc_sigkill] (0x0010): [LDAP][22259] is not responding to SIGTERM. Sending SIGKILL.
(Tue Jul 29 16:48:18 2014) [sssd] [mt_svc_sigkill] (0x0010): [nss][22262] is not responding to SIGTERM. Sending SIGKILL.
(Tue Jul 29 16:48:18 2014) [sssd] [mt_svc_exit_handler] (0x0010): Process [nss], definitely stopped!
(Tue Jul 29 19:01:17 2014) [sssd] [monitor_quit] (0x0010): Monitor received Terminated: terminating children

sssd_nss.log
(Tue Jul 29 16:48:18 2014) [sssd[nss]] [sss_dp_init] (0x0010): Failed to connect to monitor services.
(Tue Jul 29 16:48:18 2014) [sssd[nss]] [sss_process_init] (0x0010): fatal error setting up backend connector
(Tue Jul 29 16:48:18 2014) [sssd[nss]] [sss_dp_init] (0x0010): Failed to connect to monitor services.
(Tue Jul 29 16:48:18 2014) [sssd[nss]] [sss_process_init] (0x0010): fatal error setting up backend connector
(Tue Jul 29 16:48:18 2014) [sssd[nss]] [sss_dp_init] (0x0010): Failed to connect to monitor services.
(Tue Jul 29 16:48:18 2014) [sssd[nss]] [sss_process_init] (0x0010): fatal error setting up backend connector

sssd_LDAP.log
(Tue Jul 29 16:48:18:940606 2014) [sssd[be[LDAP]]] [confdb_get_domain_internal] (0x0020): No enumeration for [LDAP]!
(Tue Jul 29 16:48:19:181330 2014) [sssd[be[LDAP]]] [be_process_init] (0x0020): No Session module provided for [LDAP] !!
(Tue Jul 29 16:48:19:181468 2014) [sssd[be[LDAP]]] [be_process_init] (0x0020): No host info module provided for [LDAP] !!
(Tue Jul 29 16:48:19:181550 2014) [sssd[be[LDAP]]] [main] (0x0020): Backend provider (LDAP) started!
(Tue Jul 29 19:01:17:891413 2014) [sssd[be[LDAP]]] [confdb_get_domain_internal] (0x0020): No enumeration for [LDAP]!
(Tue Jul 29 19:01:17:934694 2014) [sssd[be[LDAP]]] [be_process_init] (0x0020): No Session module provided for [LDAP] !!
(Tue Jul 29 19:01:17:934781 2014) [sssd[be[LDAP]]] [be_process_init] (0x0020): No host info module provided for [LDAP] !!
(Tue Jul 29 19:01:17:934831 2014) [sssd[be[LDAP]]] [main] (0x0020): Backend provider (LDAP) started!