Net guests intermittently cannot contact apcupsd net host

Bug #1076177 reported by Ryan Finnie
0
Affects Status Importance Assigned to Milestone
apcupsd (Ubuntu)
New
Undecided
Unassigned

Bug Description

I have a host with apcupsd installed and an APC Back-UPS BX1000G attached. The network interface is enabled (NETSERVER on), and other machines being powered by the APC also have apcupsd installed as net guests (UPSTYPE net).

Intermittently, the guests will not be able to poll the host for a short time, resulting in commfailure and commok events:

    Broadcast Message from root@guest
        (somewhere) at 14:59 ...
    Warning communications lost with UPS host

    Broadcast Message from root@guest
        (somewhere) at 14:59 ...
    Communications restored with UPS host

I am confident it is the host (running precise) which is somehow blocking, not the guest themselves because the guests all do this at the exact same moment. The guests are also a variety of distros (Debian, Ubuntu, CentOS/SL, etc), some are physical, some are VMs on the host.

The failure is very intermittent. Sometimes there will be a series of them over the course of a few minutes, sometimes it will be hours or days between them. Load on the host does not appear to be a factor.

Unfortunately I have never been able to capture this while running apcupsd with debugging on.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: apcupsd 3.14.10-1
ProcVersionSignature: Ubuntu 3.2.0-32.51-generic 3.2.30
Uname: Linux 3.2.0-32-generic x86_64
ApportVersion: 2.0.1-0ubuntu14
Architecture: amd64
Date: Wed Nov 7 15:02:37 2012
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Beta amd64 (20120229)
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: apcupsd
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.default.apcupsd:
 # Defaults for apcupsd initscript

 # Apcupsd-devel internal configuration
 APCACCESS=/sbin/apcaccess
 ISCONFIGURED=yes
mtime.conffile..etc.apcupsd.apcupsd.conf: 2012-03-03T12:30:13
mtime.conffile..etc.default.apcupsd: 2012-03-03T12:30:46

Revision history for this message
Ryan Finnie (fo0bar) wrote :
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