something is resetting modification times on my files

Bug #459011 reported by Tormod Volden
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Ubuntu
Expired
Undecided
Unassigned

Bug Description

Many of my files have gotten a modification time of "1980-01-01 00:00:00" on a vfat partition, or "1940-10-24 02:26:18" on my ext3 root partition. Only normal files are affected, not directories.

Only files in my home directory are affected on the root partition, and on the vfat partition only files in a directory for which I had a shortcut or link on my desktop and in my Nautilus bookmarks. I therefore think it is a user program that is doing something bad.

Earlier suspicions were vfat (but I have now seen it on ext3), nautilus (but I have seen it in directories I never browsed with nautilus), tracker (I have uninstalled it).

The change times of the affected files are grouped together in spans of several minutes or hours, so it can seem like there is a program/daemon going through file trees and messing up modification times.

For instance, in my home directory, almost all the file inodes concerned were changed between 11:54:17-11:54:26 (4000 files) or 11:55:01-11:55:10 (900 files) on 2009-10-14.

On the vfat partition, 2008-07-14 14:14:24-14:16:53 (4000 files) then some other dates as well. I will attach the "stat | grep ^Change" list for these files. There are some "holes" of several seconds where no inodes were updated. I wonder if it is some kind of "niced" process that takes a pause if something else using the system.

In some directories some files have kept their correct modification time, but their change time is the same as for those files in the same directory which had their modification time reset.

I am using a pretty standard Gnome setup. The only "special" with my setup is the use of dmraid mirror, but I don't see how that would reset mtimes without messing other things up.

This is so far a vague bug report, because I have no idea what is going on. I am not sure which package is responsible if any. Anyway I am filing it to track my own investigation and to see if other people have experienced this.

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
Package: ubuntu-standard 1.140
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-meta
Uname: Linux 2.6.31-11-generic i686

Revision history for this message
Tormod Volden (tormodvolden) wrote :
description: updated
Revision history for this message
Tormod Volden (tormodvolden) wrote :
affects: ubuntu-meta (Ubuntu) → ubuntu
description: updated
Revision history for this message
Tormod Volden (tormodvolden) wrote :

I try to remember what I did 2009-10-14, I think I was moving directories around, but (mostly) using mv and not nautilus. Is it possible that some inotify stuff is triggered and something like a misbehaving thumbnailer or indexer is started?

Revision history for this message
Tormod Volden (tormodvolden) wrote :

Looking through backups, this happened the first time between 20070316 and 20070613 on the vfat fs. The system was initially installed with dmraid and set up in dual boot with XP in March 2006.

Revision history for this message
David Tombs (dgtombs) wrote :

Weird, I've never seen anything like this on my box. Still an issue with later versions of Ubuntu?

Changed in ubuntu:
status: New → Incomplete
Revision history for this message
Tormod Volden (tormodvolden) wrote :

Well, hard to say, since this does not happen regularly. I will have to do a scan again to see if more files have lost their date. I haven't heard of anyone else having this problem. Definitely weird.

Revision history for this message
Launchpad Janitor (janitor) wrote :

[Expired for Ubuntu because there has been no activity for 60 days.]

Changed in ubuntu:
status: Incomplete → Expired
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