694146 – SSSD consumes GBs of RAM, possible memory leak

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Bug 694146 - SSSD consumes GBs of RAM, possible memory leak

Summary: SSSD consumes GBs of RAM, possible memory leak

Keywords:
Status:	CLOSED ERRATA
Alias:	None
Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	sssd
Sub Component:
Version:	6.1
Hardware:	x86_64
OS:	Linux
Priority:	high
Severity:	high
Target Milestone:	rc
Target Release:	---
Assignee:	Stephen Gallagher
QA Contact:	Chandrasekar Kannan
Docs Contact:
URL:
Whiteboard:
Depends On:	692251
Blocks:	694149 694217
TreeView+	depends on / blocked

Reported:	2011-04-06 15:08 UTC by Stephen Gallagher
Modified:	2015-01-04 23:47 UTC (History)
CC List:	11 users (show)
Fixed In Version:	sssd-1.5.1-29.el6
Doc Type:	Bug Fix
Doc Text:
Clone Of:	692251
Clones:	694149 694217 (view as bug list)
Environment:
Last Closed:	2011-05-19 11:40:48 UTC
Target Upstream Version:
Embargoed:

Attachments	(Terms of Use)
LDIF for bulk user creation (2.64 MB, text/plain) 2011-04-14 15:23 UTC, Stephen Gallagher	no flags	Details
LDIF for bulk group membership addition (1.13 MB, text/plain) 2011-04-14 15:23 UTC, Stephen Gallagher	no flags	Details
LDIF for bulk group membership removal (1.13 MB, text/plain) 2011-04-14 15:28 UTC, Stephen Gallagher	no flags	Details
View All

Links
System	ID	Private	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2011:0560	0	normal	SHIPPED_LIVE	Low: sssd security, bug fix, and enhancement update	2011-05-19 11:38:17 UTC

Comment 2 RHEL Program Management 2011-04-06 15:24:06 UTC

Since RHEL 6.1 External Beta has begun, and this bug remains
unresolved, it has been rejected as it is not proposed as
exception or blocker.

Red Hat invites you to ask your support representative to
propose this request, if appropriate and relevant, in the
next release of Red Hat Enterprise Linux.

Comment 5 Stephen Gallagher 2011-04-14 15:23:20 UTC

Created attachment 492144 [details]
LDIF for bulk user creation

Comment 6 Stephen Gallagher 2011-04-14 15:23:50 UTC

Created attachment 492145 [details]
LDIF for bulk group membership addition

Comment 8 Stephen Gallagher 2011-04-14 15:28:16 UTC

Created attachment 492148 [details]
LDIF for bulk group membership removal

Comment 9 Stephen Gallagher 2011-04-14 15:42:04 UTC

These steps are a bit contrived, but they should adequately demonstrate the problem and the solution. Copy the three LDIF files attached to this bug to the test system. DO NOT PERFORM THIS TEST ON BARE IRON. Use a VM. If you don't kill the test before the memory grows too large, the OOM killer will start causing problems and you may have to forcibly kill the VM.

Steps to reproduce (all performed as root):
1) Set up SSSD with a single LOCAL domain (domain name must be LOCAL to use the attached LDIf files):

[sssd]
config_file_version = 2

services = nss, pam

domains = LOCAL

[nss]

[pam]
[domain/LOCAL]
description = LOCAL Users domain
id_provider = local
min_id = 1000


2) Stop SSSD, rm -f /var/lib/db/sssd.ldb; restart SSSD

3) Bulk load 10,000 users into the local domain using the usersadd.ldif
ldbadd -H /var/lib/db/sssd.ldb usersadd.ldif

4) Add the following two groups with the sss_groupadd command:
sss_groupadd largegroup1
sss_groupadd largegroup2
(They must be named largegroup1 and largegroup2 for the attached LDIFs to work properly)

5) Add the 10,000 users to each of those groups using groupadd.ldif
ldbmodify -H /var/lib/db/sssd.ldb groupadd.ldif

6) Open a separate window and run 'top'. Keep this window visible.

7) Remove group members from the two large groups using groupdel.ldif
ldbmodify -H /var/lib/db/sssd.ldb groupdel.ldif

While watching the 'top' window, you will see the memory percentage increase rapidly. Be prepared to kill the ldbmodify command before memory grows too high.

Comment 11 Gowrishankar Rajaiyan 2011-04-15 15:19:40 UTC

# rpm -q sssd
sssd-1.5.1-26.el6.x86_64

top - 14:48:32 up  2:08,  4 users,  load average: 0.91, 0.63, 0.36
Tasks: 125 total,   2 running, 123 sleeping,   0 stopped,   0 zombie
Cpu(s): 26.0%us,  1.3%sy,  0.0%ni, 72.6%id,  0.0%wa,  0.0%hi,  0.1%si,  0.0%st
Mem:  15377228k total, 13581608k used,  1795620k free,    19096k buffers
Swap: 15470584k total,        0k used, 15470584k free,   234996k cached


# rpm -q sssd
sssd-1.5.1-29.el6.x86_64

top - 14:54:03 up  2:14,  4 users,  load average: 0.99, 0.79, 0.49
Tasks: 125 total,   2 running, 123 sleeping,   0 stopped,   0 zombie
Cpu(s): 24.4%us,  0.7%sy,  0.0%ni, 75.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:  15377228k total,   767704k used, 14609524k free,    19980k buffers
Swap: 15470584k total,        0k used, 15470584k free,   247280k cached


Memory doesn't keep growing. Verified. 
# rpm -qi sssd
Name        : sssd                         Relocations: (not relocatable)
Version     : 1.5.1                             Vendor: Red Hat, Inc.
Release     : 29.el6                        Build Date: Thu 14 Apr 2011 09:56:12 PM IST
Install Date: Fri 15 Apr 2011 02:49:16 PM IST      Build Host: ls20-bc2-14.build.redhat.com
Group       : Applications/System           Source RPM: sssd-1.5.1-29.el6.src.rpm
Size        : 3462869                          License: GPLv3+
Signature   : (none)
Packager    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
URL         : http://fedorahosted.org/sssd/
Summary     : System Security Services Daemon

Comment 12 errata-xmlrpc 2011-05-19 11:40:48 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0560.html

Comment 13 errata-xmlrpc 2011-05-19 13:10:20 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2011-0560.html

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