rsync - Sep 2007 - DO NOT REPLY [Bug 4977] New: rsync: failed to set times on

https://bugzilla.samba.org/show_bug.cgi?id=4977

           Summary: rsync: failed to set times on
           Product: rsync
           Version: 2.6.9
          Platform: x86
               URL: http://www.mikerubel.org/computers/rsync_snapshots/
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: core
        AssignedTo: wayned@samba.org
        ReportedBy: erwin.vd.glind@home.nl
         QAContact: rsync-qa@samba.org


Hello, I'm using the backup script from
http://www.mikerubel.org/computers/rsync_snapshots/ for some time now without
probs.
But lately (like 2 weeks) rsync gives me errors like these:
rsync: failed to set times on
"/root/snapshot/home/hourly.0/var/www/localhost/htdocs/squirrelmail/plugins/ldapuserdata/doc/ldapuserdata":
Function not implemented (38)

But it continues to backup... but i don't know if the backup actually
worked...

It also exits like this:
rsync error: some files could not be transferred (code 23) at main.c(980)
[sender=2.6.9]

So i guess that some files aren't backupped :O

Ehm i don't know if you want more information, if so, let me know.
I did tried for the search function but i couldn't find any answer...

Greetz
Erwin


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------- Comment #1 from erwin.vd.glind@home.nl  2007-09-16 16:52 CST -------
Ah yes the command i use is:
$RSYNC                                                          \
        -va --delete --delete-excluded                          \
        --exclude-from="$EXCLUDES"                              \
        /home/ $SNAPSHOT_RW/home/hourly.0


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------- Comment #2 from hashproduct+rsync@gmail.com  2007-09-16 17:10 CST
-------
(In reply to comment #0)
> Hello, I'm using the backup script from
> http://www.mikerubel.org/computers/rsync_snapshots/ for some time now
without
> probs.
> But lately (like 2 weeks) rsync gives me errors like these:
> rsync: failed to set times on
>
"/root/snapshot/home/hourly.0/var/www/localhost/htdocs/squirrelmail/plugins/ldapuserdata/doc/ldapuserdata":
> Function not implemented (38)
That means rsync issued a system call to set the times but the operating system
returned an error.  Such errors usually are not rsync's fault.  Try setting
the
times of that file manually using "touch
--reference=/home/var/www/localhost/htdocs/squirrelmail/plugins/ldapuserdata/doc/ldapuserdata
/root/snapshot/home/hourly.0/var/www/localhost/htdocs/squirrelmail/plugins/ldapuserdata/doc/ldapuserdata"
to see if you get the same error.
> But it continues to backup... but i don't know if the backup actually
worked...
Rsync considers most filesystem errors non-fatal: it reports them but continues
with the copy.  You can usually assume that all files are copied correctly
except those specifically mentioned in error messages.
> It also exits like this:
> rsync error: some files could not be transferred (code 23) at main.c(980)
> [sender=2.6.9]
> 
> So i guess that some files aren't backupped :O
That message is just referring to the failure to set times.  If some files were
not copied, rsync would have printed additional errors about that.


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------- Comment #3 from erwin.vd.glind@home.nl  2007-09-16 17:26 CST -------
Well i tried your command and it worked without errors...

But i saw also that all files were symlinks, maybe thats the reason why it
doesnt works?

Gr
Erwin


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------- Comment #4 from hashproduct+rsync@gmail.com  2007-09-16 19:16 CST
-------
(In reply to comment #3)
> Well i tried your command and it worked without errors...
> 
> But i saw also that all files were symlinks, maybe thats the reason why it
> doesnt works?
That explains it.  I bet rsync is trying to call lutimes to set the symlink
times but the kernel doesn't support it.  Since support for lutimes was
added
to Linux in version 2.6.22, this could happen if you build rsync on a system
with kernel >= 2.6.22 and run the result on a system with kernel < 2.6.22.
Is
this your situation?

Symlink mtimes usually don't mean anything terribly important, so you
probably
don't need to worry about the errors.  If you want them to go away, rebuild
rsync on the system that is running it and use that copy of rsync.


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------- Comment #5 from erwin.vd.glind@home.nl  2007-09-17 05:00 CST -------
I will look tonight for that, but the rsync was builded on the same system i
use the script with so it must be built with the kernel my system is running
with....

Gr
Erwin


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------- Comment #6 from wayned@samba.org  2007-09-17 09:47 CST -------
You can comment out the define of HAVE_LCHMOD in config.h if configure thought
you had lchmod(), but it's not really working.


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------- Comment #7 from hashproduct+rsync@gmail.com  2007-09-17 11:07 CST
-------
Good point, except the relevant system call is lutimes, controlled by
HAVE_LUTIMES in config.h.


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me@shadsterling.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |me@shadsterling.com




------- Comment #8 from me@shadsterling.com  2007-10-12 16:14 CST -------
I had the same problem with my backups, and rebuilding it on the same machine
didn't help.  I suspect it's because support for lutimes is fs-specific,
and I
have ext3 (which supports lutimes) on /home (where the build was done), and
reiserfs (which apparently does not support lutimes) on /volumes/backup (where
the backups are stored)

A rebuild with HAVE_LUTIMES forcibly undefined does not give the error.

I think a real solution would be for rsync to detect lutimes support per-fs at
runtime, before attempting to use it.  I'd be happy if it never bothered to
try, or not unless given something like --have_lutimes.  I'm not happy
having
the default be to throw a bunch of errors about something I don't care about
that can't be done on that disk anyway.

[polyergic@seneschal ~]$ uname -a
Linux seneschal 2.6.21.7-1 #1 SMP Sat Aug 4 18:59:20 UTC 2007 i686
AMD_Athlon(tm)_Processor PLD Linux


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wayned@samba.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
            Version|2.6.9                       |3.0.0




------- Comment #9 from wayned@samba.org  2007-10-12 20:33 CST -------
Why not upgrade to 3.0.0 then?  This is one of the things that is improved --
it doesn't bother to output an error about failing to set the time on a
symlink.


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------- Comment #10 from hashproduct+rsync@gmail.com  2007-10-12 20:42 CST
-------
(In reply to comment #8)
> I suspect it's because support for lutimes is fs-specific, and I
> have ext3 (which supports lutimes) on /home (where the build was done)
> Linux seneschal 2.6.21.7-1 #1 SMP Sat Aug 4 18:59:20 UTC 2007 i686
BTW: lutimes isn't going to work on any filesystem with a kernel before
2.6.22.
 For HAVE_LUTIMES, the configure script tests only whether the
"lutimes"
function exists in glibc as a non-stub, not whether it actually works.  Thus,
if your copy of glibc was built on a machine with kernel >= 2.6.22, it will
contain a non-stub lutimes and rsync's HAVE_LUTIMES test will pass.


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------- Comment #11 from erwin.vd.glind@home.nl  2007-10-13 02:00 CST -------
Well indeed i use the 2.6.21 kernel and im building a 2.6.22 kernel right now.

Version 3 isnt out on gentoo isnt?


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------- Comment #12 from hashproduct+rsync@gmail.com  2007-10-13 14:21 CST
-------
(In reply to comment #11)
> Version 3 isnt out on gentoo isnt?
Version 3.0.0 has not been released yet, but you could use the current
pre-release, rsync 3.0.0pre2 .  I don't know whether Gentoo offers the
pre-releases, but you could always compile and install rsync from source
yourself.


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