Re: very odd nfs behaviour

From	Richard Kettlewell <invalid@invalid.invalid>
Newsgroups	alt.os.linux.mint, comp.os.linux.networking
Subject	Re: very odd nfs behaviour
Date	2025-01-24 17:55 +0000
Organization	terraraq NNTP server
Message-ID	<wwvldv0rt9i.fsf@LkoBDZeT.terraraq.uk> (permalink)
References	<vn0gn0$2ajlc$1@dont-email.me>

Cross-posted to 2 groups.

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Mike Scott <usenet.16@scottsonline.org.uk.invalid> writes:
> A very odd situation here.
>
> I have a (freebsd) server serving a tree of photos and information
> files. It's large, and the paths quite long - whether that's relevant
> I don't know.

How many files in the directory?

> On two of three machines all running mint at various versions all is
> well; I have problems on the third, which happens to be my desktop
> box. An example good listing would be (sorry about wrap):
>
> mike@troi ~ $ ls
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.*
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG.exif
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--info.html
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG.sha
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--slide.html
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--slide.png
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--thumb.png
>
> That corresponds exactly to what's on the server.
>
>
> However, on my desktop m/c, the same command complains about a missing
> file, and triplicates all the lines bar the first, which is
> duplicated, and there's an error about not finding a file that has an
> incorrect name anyway:
>
> Desktop> ls
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.*
> ls: cannot access
> '/nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.2':
> No such file or directory
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG.exif
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG.exif
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--info.html
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--info.html
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--info.html
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG.sha
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG.sha
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG.sha
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--slide.html
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--slide.html
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--slide.html
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--slide.png
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--slide.png
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--slide.png
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--thumb.png
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--thumb.png
> /nfs/mmedia/pictures/originals-index4/mike/camera2014/20140531b/2014-04-24/2014-04-15_10-21-47.JPG--thumb.png
>
>
> If I unmount and remount the file system, I get different results -
> always works on the other machines, and fails /differently/ each time
> on mine.
>
>
> I've also seen this happen in a virtual machine running on my box.
>
> It happens whether I hard mount or use the automounter.
>
>
> The OS versions are different - I'm running mint 21.2, the VM is at
> 21.3; while the others are both rather older versions (and different
> hardware). The machines are all configured the same.
>
>
> I'm at a loss! Can anyone suggest what's going on here please? I'm
> sure this used to work!

Formerly, Linux NFS servers could get confused by large directories.
https://lwn.net/Articles/544520/ is the best writeup I’ve found.

In your case the server is FreeBSD, so Linux’s historical bugs aren’t
directly relevant, beyond highlighting that merely listing a directory
is more complex than you might initially imagine. I’m not sure why a
hypothetical similar bug in FreeBSD would only be visible on a subset of
clients either.

-- 
https://www.greenend.org.uk/rjk/

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Thread

very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-24 16:56 +0000
  Re: very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-24 17:00 +0000
  Re: very odd nfs behaviour Edmund <nomail@hotmail.com> - 2025-01-24 18:01 +0100
    Re: very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-24 17:30 +0000
  Re: very odd nfs behaviour Richard Kettlewell <invalid@invalid.invalid> - 2025-01-24 17:55 +0000
    (resolved) Re: very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-27 15:41 +0000
      Re: (resolved) Re: very odd nfs behaviour Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-01-27 23:24 +0000
        Re: (resolved) Re: very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-28 08:06 +0000
          Re: (resolved) Re: very odd nfs behaviour "Carlos E.R." <robin_listas@es.invalid> - 2025-01-28 12:34 +0100
          Re: (resolved) Re: very odd nfs behaviour pinnerite <pinnerite@gmail.com> - 2025-01-28 22:58 +0000
  Re: very odd nfs behaviour "Carlos E.R." <robin_listas@es.invalid> - 2025-01-24 22:56 +0100
    Re: very odd nfs behaviour Paul <nospam@needed.invalid> - 2025-01-24 17:34 -0500
      Re: very odd nfs behaviour "Carlos E.R." <robin_listas@es.invalid> - 2025-01-25 01:45 +0100
    Re: very odd nfs behaviour Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-01-25 17:02 +0000
  Re: very odd nfs behaviour "Arti F. Idiot" <addr@is.invalid> - 2025-01-24 17:13 -0700
  Re: very odd nfs behaviour Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-01-26 00:01 +0000
  Re: very odd nfs behaviour Grant Taylor <gtaylor@tnetconsulting.net> - 2025-01-25 20:08 -0600

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