Bug 1325870

Summary: dbus-daemon fails to close correct file descriptors
Product: Red Hat Enterprise Linux 7 Reporter: Siteshwar Vashisht <svashisht>
Component: dbusAssignee: David King <dking>
Status: CLOSED ERRATA QA Contact: Desktop QE <desktop-qa-list>
Severity: high Docs Contact: Milan Navratil <mnavrati>
Priority: high    
Version: 7.2CC: alanm, ayadav, chorn, hmatsumo, jwright, kcleveng, mcepl, mkolbas, mnavrati, mpoole, neil, ssahoo, tpelka, vagrawal, vbenes
Target Milestone: rcKeywords: Regression, ZStream
Target Release: ---   
Hardware: x86_64   
OS: Linux   
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:
: 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: ---
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):

How reproducible:

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.