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[Bug 1366829] Re: 7.4.4-1ubuntu2.1 makes rsyslogd to take all the CPU in OpenVZ

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1366829@xxxxxxxxxxxxxxxxxx>
Date: Fri, 19 Dec 2014 00:24:31 -0000
Reply-to: Bug 1366829 <1366829@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

This bug was fixed in the package rsyslog - 7.4.4-1ubuntu13

---------------
rsyslog (7.4.4-1ubuntu13) vivid; urgency=medium

  * Applied upstream patch fixing infinite loop on OpenVZ VMs. Thanks to Paul
    Donohue for the patch. (LP: #1366829)
 -- Brian Murray <brian@xxxxxxxxxx>   Thu, 18 Dec 2014 15:20:23 -0800

** Changed in: rsyslog (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1366829

Title:
  7.4.4-1ubuntu2.1 makes rsyslogd to take all the CPU in OpenVZ

Status in rsyslog package in Ubuntu:
  Fix Released
Status in rsyslog source package in Trusty:
  Triaged
Status in rsyslog source package in Utopic:
  Triaged

Bug description:
  After updating  rsyslog from 7.4.4-1ubuntu2 to 7.4.4-1ubuntu2.1 the rsyslogd process started to take all the CPU on my machine.
  The modification made by this release is described in #1274444, it is the activation of KLogPermitNonKernelFacility option.
  I don't know exactly the effect of this option but it seems to have a permanent effect : even after downgrading the package or manually removing the option from /etc/rsyslog.conf the issue remains.
  My syslog is full of :
  Sep  8 10:28:40 sentry rsyslogd: imklog: error reading kernel log - shutting down: Bad file descriptor
  Sep  8 10:28:40 sentry rsyslogd: message repeated 498 times: [imklog: error reading kernel log - shutting down: Bad file descriptor]
  Sep  8 10:28:46 sentry rsyslogd-2177: rsyslogd[internal_messages]: 519517 messages lost due to rate-limiting
  I guess this is what causes the CPU load.

  I am running Ubuntu 14.04.1 LTS in an OpenVZ container on Proxmox 3.2. The kernel is 2.6.32-28-pve
  ---
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  DistroRelease: Ubuntu 14.04
  Package: rsyslog 7.4.4-1ubuntu2.1
  PackageArchitecture: amd64
  Tags:  trusty
  Uname: Linux 2.6.32-28-pve x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  _MarkForUpload: True

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