I just upgraded from 9.2.1.7 to 9.2.1.8 - no other changes. Now samba refuses to start.
The problem seems to have something to do with DNS.
How can I troubleshoot this?
Oct 1 13:04:58 home samba[3914]: [2014/10/01 13:04:58.350340, 0] ../source4/smbd/server.c:370(binary_smbd_main)
Oct 1 13:04:58 home kernel: OK
Oct 1 13:04:58 home samba[3914]: samba version 4.1.12 started.
Oct 1 13:04:58 home samba[3914]: Copyright Andrew Tridgell and the Samba Team 1992-2013
Oct 1 13:04:59 home samba[3915]: [2014/10/01 13:04:59.288799, 0] ../source4/smbd/server.c:488(binary_smbd_main)
Oct 1 13:04:59 home samba[3915]: samba: using 'standard' process model
Oct 1 13:04:59 home samba[3915]: [2014/10/01 13:04:59.327856, 0] ../source4/smbd/service.c:98(server_service_startup)
Oct 1 13:04:59 home samba[3915]: Failed to start service 'dns' - NT_STATUS_INVALID_SYSTEM_SERVICE
Oct 1 13:04:59 home samba[3915]: [2014/10/01 13:04:59.328696, 0] ../lib/util/become_daemon.c:124(exit_daemon)
Oct 1 13:04:59 home samba[3915]: STATUS=daemon failed to start: Samba failed to start services, error code -1073741796
Oct 1 13:05:02 home su: in openpam_check_error_code(): pam_sm_setcred(): unexpected return value 12
Oct 1 13:04:58 home kernel: OK
Oct 1 13:04:58 home samba[3914]: samba version 4.1.12 started.
Oct 1 13:04:58 home samba[3914]: Copyright Andrew Tridgell and the Samba Team 1992-2013
Oct 1 13:04:59 home samba[3915]: [2014/10/01 13:04:59.288799, 0] ../source4/smbd/server.c:488(binary_smbd_main)
Oct 1 13:04:59 home samba[3915]: samba: using 'standard' process model
Oct 1 13:04:59 home samba[3915]: [2014/10/01 13:04:59.327856, 0] ../source4/smbd/service.c:98(server_service_startup)
Oct 1 13:04:59 home samba[3915]: Failed to start service 'dns' - NT_STATUS_INVALID_SYSTEM_SERVICE
Oct 1 13:04:59 home samba[3915]: [2014/10/01 13:04:59.328696, 0] ../lib/util/become_daemon.c:124(exit_daemon)
Oct 1 13:04:59 home samba[3915]: STATUS=daemon failed to start: Samba failed to start services, error code -1073741796
Oct 1 13:05:02 home su: in openpam_check_error_code(): pam_sm_setcred(): unexpected return value 12
The problem seems to have something to do with DNS.
How can I troubleshoot this?