rawhide report: 20081006 changes

[Jesse Keating]

On Mon, 2008-10-06 at 20:33 +0200, Michael Schwendt wrote:
> On Mon, 06 Oct 2008 10:19:46 -0700, Jesse Keating wrote:
> 
> > The yum folks are still looking into it.  The really bizarre thing is
> > that there is no problem with the package itself, in fact it's seen in
> > other arches, and in those other arch directories it's a hardlink back
> > to the actual file somewhere else on the filesystem.  That's the way it
> > is for each of those arch trees.  It's a real headscratcher of a
> > problem.
> 
> Unless I'm misreading the code, it's a race-condition. mash creates the
> metadata for all architectures in parallel. One process per arch. The
> createrepo checksum cache file I/O [1] is not protected against concurrent
> access. With odd timing, it can happen that one process reads an empty
> checksum file that has just been opened for writing by another process.
> Give it a try. Add a safety check after reading a checksum file.
> 

That tickles a part of my brain, I think I speculated that this was the
problem while in the shower or something, and then completely forgot to
pursue it once I got ready to work.  It is a possibility.

-- 
Jesse Keating
Fedora -- Freedom² is a feature!
identi.ca: http://identi.ca/jkeating
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