Your message dated Sat, 24 Sep 2016 22:23:35 +0200
with message-id <[email protected]>
and subject line Re: Bug#600433: collectd: rrd: gets terribly confused when
entering DST (daylight savings time)
has caused the Debian Bug report #600433,
regarding collectd: rrd: issuing uc_update: Value too old messages
to be marked as done.
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If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
600433: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=600433
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: collectd
Version: 4.10.1-1+squeeze1
Severity: important
Tags: upstream
Those who do not learn from the past, are bound to repeat the same
errors forever. collectd does not use UTC. Yet, it expects to be able
to ignore timezone shifts that happen twice an year on a very very large
number of systems.
It results in this sort of crap:
collectd[2139]: Filter subsystem: Built-in target `write': Dispatching value to
all write plugins failed with
status -1.
collectd[2139]: uc_update: Value too old:name = <REMOVED>/temperature-temp1;
value time = 1287260393; last cache update = 1287260393;
being logged to syslog, for an entire hour. And it obviously inserts a
lot of bogosity in the RRD.
It needs to detect transitions in and out of DST, and do the right
thing. If it doesn't want to deal with this, it MUST use UTC.
Entering DST (non-UTC wall time goes forward): cleanly skip one hour
(leave a hole in the RRD).
Leaving DST (non-UTC wall time goes backwards): do NOT log to the RRD
either the hour preceding the DST->ST change, or the hour right after
the DST->ST change. Maybe RRDtool safeties against braindamage will
already enforce this (I didn't test).
And, obviously, log just ONCE to syslog that it is dealing with timezone
shift.
-- System Information:
Debian Release: squeeze/sid
APT prefers testing
APT policy: (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.32.23 (SMP w/8 CPU cores)
Locale: LANG=pt_BR.UTF-8, LC_CTYPE=pt_BR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages collectd depends on:
ii collectd-core 4.10.1-1+squeeze1 statistics collection and monitori
ii libc6 2.11.2-6 Embedded GNU C Library: Shared lib
ii librrd4 1.4.3-1 time-series data storage and displ
Versions of packages collectd recommends:
ii iptables 1.4.8-3 administration tools for packet fi
ii libatk1.0-0 1.30.0-1 The ATK accessibility toolkit
ii libc6 2.11.2-6 Embedded GNU C Library: Shared lib
ii libcairo2 1.8.10-6 The Cairo 2D vector graphics libra
ii libcurl3-gnutls 7.21.0-1 Multi-protocol file transfer libra
ii libdbi0 0.8.2-3 Database Independent Abstraction L
ii libdbus-1-3 1.2.24-3 simple interprocess messaging syst
ii libdbus-glib-1-2 0.88-2 simple interprocess messaging syst
ii libesmtp5 1.0.4-5 LibESMTP SMTP client library
ii libfontconfig1 2.8.0-2.1 generic font configuration library
ii libfreetype6 2.4.2-1 FreeType 2 font engine, shared lib
ii libgcrypt11 1.4.5-2 LGPL Crypto library - runtime libr
ii libglib2.0-0 2.24.2-1 The GLib library of C routines
ii libgtk2.0-0 2.20.1-1+b1 The GTK+ graphical user interface
ii libhal1 0.5.14-3 Hardware Abstraction Layer - share
pn libmemcached5 <none> (no description available)
ii libmysqlclient16 5.1.49-1 MySQL database client library
ii libnotify1 [libnotify1-gtk2 0.5.0-2 sends desktop notifications to a n
pn libopenipmi0 <none> (no description available)
pn liboping0 <none> (no description available)
ii libpango1.0-0 1.28.1-1 Layout and rendering of internatio
ii libpcap0.8 1.1.1-2 system interface for user-level pa
ii libperl5.10 5.10.1-14 shared Perl library
pn libpq5 <none> (no description available)
pn libprotobuf-c0 <none> (no description available)
ii libpython2.6 2.6.6-3 Shared Python runtime library (ver
ii librrd4 1.4.3-1 time-series data storage and displ
ii libsensors4 1:3.1.2-6 library to read temperature/voltag
ii libsnmp15 5.4.3~dfsg-1 SNMP (Simple Network Management Pr
ii libssl0.9.8 0.9.8o-2 SSL shared libraries
pn libtokyotyrant3 <none> (no description available)
ii libupsclient1 2.4.3-1+b1 network UPS tools - client library
ii libvirt0 0.8.3-3 library for interfacing with diffe
ii libxml2 2.7.7.dfsg-4 GNOME XML library
pn libyajl1 <none> (no description available)
collectd suggests no packages.
-- Configuration Files:
/etc/collectd/collectd.conf changed [not included]
-- no debconf information
--- End Message ---
--- Begin Message ---
On Sat, Sep 24, 2016 at 11:59:29AM -0300, Henrique de Moraes Holschuh wrote:
> On Sat, 24 Sep 2016, Sebastian Harl wrote:
> > Is this still happening? I believe there were a few fixes that could be
> > related to this in the past years. If it's still happening, we'll have
> > to look into more details.
>
> I wouldn't know if the bug still exists: I have stopped using collectd a
> long while ago.
>
> Sorry I can't give you better info anymore.
No worries. It's been a while :-/
I'm going to assume this isn't relevant anymore.
Cheers,
Sebastian
--
Sebastian "tokkee" Harl +++ GnuPG-ID: 0x2F1FFCC7 +++ http://tokkee.org/
Those who would give up Essential Liberty to purchase a little Temporary
Safety, deserve neither Liberty nor Safety. -- Benjamin Franklin
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