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Re: Peculiar date problem with checkout of zero-length files

From: David Brodbeck <brodbd_at_u.washington.edu>
Date: Thu, 8 Oct 2009 15:33:50 -0700

On Oct 8, 2009, at 12:32 PM, Mark Phippard wrote:

> On Thu, Oct 8, 2009 at 3:22 PM, David Brodbeck <brodbd_at_u.washington.edu
> > wrote:
>> I have a RedHat Linux server that mounts a filesystem via NFSv4 from
>> an OpenSolaris system. I'm seeing very peculiar behavior when I
>> check
>> out zero-length files using Subversion 1.5.5. These files end up
>> with
>> random dates, often far in the past or future -- I've seen dates in
>> 1917, 1955, 1958, 1987, and 2013. Naturally this causes Subversion
>> to
>> report "bogus date" errors. I've now reproduced the behavior on
>> three
>> different systems using two different Linux distributions (Ubuntu and
>> RedHat) and both 32-bit and 64-bit kernels. Some interesting
>> details:
>> - The bug DOES NOT occur with Subversion 1.4.2.
>> - The bug DOES occur with Subversion 1.5.5 and 1.6.5.
>> - The bug DOES NOT occur when checking out to an NFSv3 filesystem
>> or a
>> local ext3 filesystem; it only seems to occur with NFSv4. (Possibly
>> ACL related?)
>> - The bug DOES NOT occur when both the client and server are
>> OpenSolaris machines.
>> Has anyone seen anything like this before? Before I noticed that the
>> behavior didn't occur in Subversion 1.4.2, I reported it to RedHat as
>> a possible kernel bug (#527580), but now I'm wondering if later
>> versions of Subversion are doing something peculiar when they create
>> zero-length files.
> It might be worth comparing the versions of APR used by the different
> versions that are working and not working. Subversion uses APR
> functions for most (perhaps all) file related routines.

Hi, Mark.

That's an excellent thought. I checked the copy of Subversion 1.5.5
(which exhibits the bug) and the copy of Subversion 1.4.2 (which
doesn't) that I used, and found both are linked against /usr/lib/
libapr-1.so.0, so I don't think it's that.

David Brodbeck
System Administrator, Linguistics
University of Washington
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Received on 2009-10-09 00:34:37 CEST

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