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Description of problem: SSSD will terminate itself if for some reason it can't use inotify to monitor /etc/resolv.conf Version-Release number of selected component (if applicable): kernel-2.6.32-131.0.15.el6.x86_64 sssd-1.5.1-34.el6.x86_64 How reproducible: intermittent Steps to Reproduce: 1. set up and run SSSD 2. Suspend 3. Resume from suspend Actual results: Sometimes SSSD will terminate due to a crash in notification-daemon Expected results: SSSD should keep running and not shut down. Additional info: This could effectively lock a user out of a system if he or she is not the administrator of the system and has no way to restart SSSD
Upstream ticket opened: https://fedorahosted.org/sssd/ticket/895
A reliable way to reproduce: 1. Start sssd 2. Limit the max number of watches per instance to 1 (/proc/sys/fs/inotify/max_user_watches) 3. Make inotify to send an event IN_IGNORED (in my case, just editing and saving it in vim did the trick
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Previously, SSSD relied on the inotify kernel subsystem to detect whether a DNS resolver file had been changed. If inotify returned an error (for example due to resource exhaustion), SSSD terminated unexpectedly and network logins no longer worked. With this update, SSSD itself detects the failure in the described scenario and falls back to the five-second polling, fixing this bug.
Verification steps: 1. # echo 1 > /proc/sys/fs/inotify/max_user_watches 2. Open and edit any file. 3. /var/log/sssd/sssd.log shows: (Thu Sep 22 16:15:08 2011) [sssd] [rewatch_config_file] (1): Could not add inotify watch for file [/etc/resolv.conf]. Error [28:No space left on device] (Thu Sep 22 16:15:13 2011) [sssd] [rewatch_config_file] (0): Could not restore inotify watch. Switching to polling! 4. # service sssd status sssd (pid 1894) is running... Verified in version: # rpm -qi sssd | head Name : sssd Relocations: (not relocatable) Version : 1.5.1 Vendor: Red Hat, Inc. Release : 52.el6 Build Date: Tue 20 Sep 2011 09:11:03 PM IST Install Date: Wed 21 Sep 2011 03:07:04 PM IST Build Host: x86-010.build.bos.redhat.com Group : Applications/System Source RPM: sssd-1.5.1-52.el6.src.rpm Size : 3550647 License: GPLv3+ Signature : (none) Packager : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla> URL : http://fedorahosted.org/sssd/ Summary : System Security Services Daemon
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2011-1529.html