Hi List, Facing another issue on RHEL-6. After server reboot, the sssd is unable to go online. Messages like: (Fri Jul 3 06:13:36 2015) [sssd[be[default]]] [be_run_online_cb] (0x0080): Going online. Running callbacks. (Fri Jul 3 06:13:42 2015) [sssd[be[default]]] [fo_resolve_service_timeout] (0x0080): Service resolving timeout reached (Fri Jul 3 06:13:42 2015) [sssd[be[default]]] [sdap_id_op_connect_done] (0x0020): Failed to connect, going offline (5 [Input/output error]) (Fri Jul 3 06:13:42 2015) [sssd[be[default]]] [be_run_offline_cb] (0x0080): Going offline. Running callbacks. (Fri Jul 3 06:13:42 2015) [sssd[be[default]]] [ad_subdomains_get_conn_done] (0x0080): No AD server is available, cannot get the subdomain list while offline (Fri Jul 3 06:13:42 2015) [sssd[be[default]]] [sdap_dyndns_get_addrs_done] (0x0080): No LDAP server is available, dynamic DNS update is skipped in offline mode. (Fri Jul 3 06:13:42 2015) [sssd[be[default]]] [sdap_dyndns_update_addrs_done] (0x0040): Can't get addresses for DNS update (Fri Jul 3 06:13:42 2015) [sssd[be[default]]] [ad_dyndns_sdap_update_done] (0x0040): Dynamic DNS update failed [1432158230]: Dynamic DNS update not possible while offline (Fri Jul 3 06:13:42 2015) [sssd[be[default]]] [ad_dyndns_nsupdate_done] (0x0040): Updating DNS entry failed [1432158230]: Dynamic DNS update not possible while offline (Fri Jul 3 06:13:42 2015) [sssd[be[default]]] [fo_resolve_service_timeout] (0x0080): Service resolving timeout reached (Fri Jul 3 06:13:42 2015) [sssd[be[default]]] [be_ptask_enable] (0x0080): Task [Check if online (periodic)]: already enabled (Fri Jul 3 06:13:42 2015) [sssd[be[default]]] [be_run_offline_cb] (0x0080): Going offline. Running callbacks. (Fri Jul 3 06:14:52 2015) [sssd[be[default]]] [be_run_online_cb] (0x0080): Going online. Running callbacks. (Fri Jul 3 06:14:58 2015) [sssd[be[default]]] [fo_resolve_service_timeout] (0x0080): Service resolving timeout reached (Fri Jul 3 06:14:58 2015) [sssd[be[default]]] [be_run_offline_cb] (0x0080): Going offline. Running callbacks. (Fri Jul 3 06:15:00 2015) [sssd[be[default]]] [sss_ldap_init_sys_connect_done] (0x0020): sdap_async_sys_connect request failed. (Fri Jul 3 06:15:00 2015) [sssd[be[default]]] [sdap_sys_connect_done] (0x0020): sdap_async_connect_call request failed. (Fri Jul 3 06:15:06 2015) [sssd[be[default]]] [sss_ldap_init_sys_connect_done] (0x0020): sdap_async_sys_connect request failed. And strangely also: (Fri Jul 3 06:19:37 2015) [sssd[be[default]]] [be_resolve_server_process] (0x0080): Couldn't resolve server (SRV lookup meta-server), resolver returned (1432158227) (Fri Jul 3 06:19:37 2015) [sssd[be[default]]] [be_resolve_server_process] (0x0080): Couldn't resolve server (xxx.yyy.zzz), resolver returned (5) (Fri Jul 3 06:19:37 2015) [sssd[be[default]]] [be_resolve_server_process] (0x0080): Couldn't resolve server (xxx2.yyy.zzz), resolver returned (5) Looks like DNS issue but I am pretty sure DNS worked just fine. After sssd restart everything goes just fine. sssd-1.11.7-4.el6 Thanks, Ondrej ----- The information contained in this e-mail and in any attachments is confidential and is designated solely for the attention of the intended recipient(s). If you are not an intended recipient, you must not use, disclose, copy, distribute or retain this e-mail or any part thereof. If you have received this e-mail in error, please notify the sender by return e-mail and delete all copies of this e-mail from your computer system(s). Please direct any additional queries to: communications(a)s3group.com. Thank You. Silicon and Software Systems Limited (S3 Group). Registered in Ireland no. 378073. Registered Office: South County Business Park, Leopardstown, Dublin 18.