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Bug 746654 - SSSD backend gets killed on slow systems
Summary: SSSD backend gets killed on slow systems
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: sssd
Version: 6.1
Hardware: Unspecified
OS: Unspecified
high
unspecified
Target Milestone: rc
: ---
Assignee: Stephen Gallagher
QA Contact: IDM QE LIST
URL:
Whiteboard:
Depends On: 728343 748864
Blocks: 748554 748893
TreeView+ depends on / blocked
 
Reported: 2011-10-17 12:31 UTC by Jan Zeleny
Modified: 2020-05-02 16:28 UTC (History)
6 users (show)

Fixed In Version: sssd-1.5.1-59.el6
Doc Type: Bug Fix
Doc Text:
Do not document
Clone Of:
: 748893 (view as bug list)
Environment:
Last Closed: 2011-12-06 16:41:10 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github SSSD sssd issues 2101 0 None None None 2020-05-02 16:28:13 UTC
Red Hat Product Errata RHBA-2011:1529 0 normal SHIPPED_LIVE sssd bug fix and enhancement update 2011-12-06 00:50:20 UTC

Description Jan Zeleny 2011-10-17 12:31:00 UTC 
On system with slow network connections or on system under heavy load, the SSSD backend fails to response to monitor pings through SBUS in time and it gets killed repeatedly.

This results in logins taking several minutes. Sometimes the login process gets frozen altogether.
Comment 1 Stephen Gallagher 2011-10-17 12:33:46 UTC 
The cause of this bug was that the timeout option is specified in seconds and we were not multiplying it by 1000 before passing it to a function argument requiring milliseconds. Thus 10s (default) was being treated as 10ms. This is far too short a time to reasonably expect a response.
Comment 3 Jan Zeleny 2011-10-17 12:50:55 UTC 
Steps to reproduce:
1. Set timeout=1 in config file
2. Remove cache and logs
3. Start sssd
4. tail -f /var/log/sssd/sssd.log
5. log in as a user stored on remote server to invoke backend operation

You should see messages in the log that connection to backend timed out. If the operation of backend is long enough, the monitor sends SIGTERM to the backend and it has to restart, potentially leaving ongoing auth requests to hang.
Comment 7 Kaushik Banerjee 2011-10-18 07:47:10 UTC 
Verified that auth works appropriately and backend doesn't get killed on a slow system.

Verified in version:
# rpm -qi sssd | head
Name        : sssd                         Relocations: (not relocatable)
Version     : 1.5.1                             Vendor: Red Hat, Inc.
Release     : 59.el6                        Build Date: Mon 17 Oct 2011 04:59:48 PM EDT
Install Date: Tue 18 Oct 2011 01:22:41 AM EDT      Build Host: x86-003.build.bos.redhat.com
Group       : Applications/System           Source RPM: sssd-1.5.1-59.el6.src.rpm
Size        : 3615305                          License: GPLv3+
Signature   : (none)
Packager    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
URL         : http://fedorahosted.org/sssd/
Summary     : System Security Services Daemon
Comment 8 Jakub Hrozek 2011-10-25 15:27:22 UTC 
Upstream ticket:
https://fedorahosted.org/sssd/ticket/1059
Comment 9 Jakub Hrozek 2011-10-27 14:32:17 UTC 
    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:
Do not document
Comment 10 errata-xmlrpc 2011-12-06 16:41:10 UTC 
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
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