Bug 1325870

Summary:	dbus-daemon fails to close correct file descriptors
Product:	Red Hat Enterprise Linux 7	Reporter:	Siteshwar Vashisht <svashisht>
Component:	dbus	Assignee:	David King <dking>
Status:	CLOSED ERRATA	QA Contact:	Desktop QE <desktop-qa-list>
Severity:	high	Docs Contact:	Milan Navratil <mnavrati>
Priority:	high
Version:	7.2	CC:	alanm, ayadav, chorn, hmatsumo, jwright, kcleveng, mcepl, mkolbas, mnavrati, mpoole, neil, ssahoo, tpelka, vagrawal, vbenes
Target Milestone:	rc	Keywords:	Regression, ZStream
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	dbus-1.6.12-14.el7	Doc Type:	Release Note
Doc Text:	The dbus-daemon service no longer becomes unresponsive due to leaking file descriptors Previously, the dbus-daemon service incorrectly handled multiple messages containing file descriptors if they were received in a short time period. As a consequence, dbus-daemon leaked file descriptors and became unresponsive. A patch has been applied to correctly handle multiple file descriptors from different messages inside dbus-daemon. As a result, dbus-daemon closes and passes file descriptors correctly and no longer becomes unresponsive in the described situation.	Story Points:	---
Clone Of:
Clones:	1348830 (view as bug list)		Environment:
Last Closed:	2016-11-04 06:41:05 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1203710, 1348830, 1364088

Description Siteshwar Vashisht 2016-04-11 12:06:28 UTC

Description of problem:
dbus-daemon fails to close correct file descriptors.

Version-Release number of selected component (if applicable):
dbus-1.6.12-11.el7.x86_64

How reproducible:
Always

Actual results:
'dbus-daemon: Failed to close file descriptor: Could not close fd' messages appear in journal logs


Expected results:
Correct file descriptors should be closed.

Additional info:

This is a known bug which was fixed through https://cgit.freedesktop.org/dbus/dbus/commit/?id=07f4c12efe3b9bd45d109bc5fbaf6d9dbf69d78e

Comment 3 neil 2016-05-03 19:58:49 UTC

We're hitting this bug often enough that dbus-daemon hits the open fd limit (2144 by default). Once this happens, dbus-daemon starts chewing through 100% CPU time of a core until dbus-daemon is restarted.

In a cluster of 8 machines with the same workload and same uptime we've observed a wide variance in the number of "leaked" fds per hour, ranging from ~0.42 fds/hour to 1.38 fds/hour. However, all machines are leaking fds over time, just at different rates.

Observed with dbus-1.6.12-13.el7.x86_64.

Comment 6 neil 2016-05-04 14:37:49 UTC

It would be ideal if this could be fixed in time for RHEL 7.3.

Comment 19 errata-xmlrpc 2016-11-04 06:41:05 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.

https://rhn.redhat.com/errata/RHBA-2016-2453.html