Hi, On 2015-07-01 21:08, Vincent Lefevre wrote: > Package: sensord > Version: 1:3.3.5-2 > Severity: grave > Justification: causes non-serious data loss > > It seems that sensord uses an inconsistent set of data for its > RRD update, yielding data loss. "rrd update" no longer updates > the sensord.rrd database: > > -rw-r--r-- 1 root root 82480 2015-05-13 00:25:00 /var/log/sensord.rrd > > due to the following errors seen in my /var/log/syslog file: > > [...] > Jul 1 20:30:00 xvii sensord: Error updating RRD file: /var/log/sensord.rrd: > /var/log/sensord.rrd: found extra data on update argument: > 67.0:67.0:66.0:74.0:1.580000 > Jul 1 20:30:00 xvii sensord: rrd update error (-1) > Jul 1 20:35:00 xvii sensord: Error updating RRD file: /var/log/sensord.rrd: > /var/log/sensord.rrd: found extra data on update argument: > 62.0:54.0:57.0:69.0:0.520000 > Jul 1 20:35:00 xvii sensord: rrd update error (-1) > Jul 1 20:40:00 xvii sensord: Error updating RRD file: /var/log/sensord.rrd: > /var/log/sensord.rrd: found extra data on update argument: > 66.0:62.0:64.0:72.0:1.330000 > Jul 1 20:40:00 xvii sensord: rrd update error (-1) > Jul 1 20:45:00 xvii sensord: Error updating RRD file: /var/log/sensord.rrd: > /var/log/sensord.rrd: found extra data on update argument: > 63.0:54.0:57.0:70.0:0.540000 > Jul 1 20:45:00 xvii sensord: rrd update error (-1) > Jul 1 20:50:00 xvii sensord: Error updating RRD file: /var/log/sensord.rrd: > /var/log/sensord.rrd: found extra data on update argument: > 60.0:54.0:59.0:66.0:0.300000 > Jul 1 20:50:00 xvii sensord: rrd update error (-1) > [...]
From what I have been able to get the problem is that when using a single rrd file for all data, the number of columns (ie sensors) is defined when the file is created. Therefore the upgrade of your kernel changed the number of sensors, and caused this issue. From what I have been able to read in the documentation, one solution would be to use the MULTIPLE mode of RRD, which create one file per column or sensor. But this format is incompatible with the current one, which means people will have to recreate their database, and possibly the scripts extracting the data for them. I don't really know what is the solution for this bug, one might be to stop shipping sensord in Debian as it is kind of dead upstream and not build by default. -- Aurelien Jarno GPG: 4096R/1DDD8C9B [email protected] http://www.aurel32.net -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
