[Buildd-tools-devel] Bug#489116: Bug#489116: schroot: possible race condition during chroot setup?

[Lucas Nussbaum]

On 03/07/08 at 20:13 +0100, Roger Leigh wrote:
> Lucas Nussbaum <lucas at lucas-nussbaum.net> writes:
> 
> > I run several instances of sbuild+schroot in parallel. Sometimes, I run
> > into the following error message:
> > Build started at 20080703-0045
> > ******************************************************************************
> > Cannot create link /etc/mtab~
> > Perhaps there is a stale lock file?
> >
> > E: lsid32-ba72d12e-d721-4f01-aa83-78ce46e9691c: Chroot setup failed: stage=setup-start
> > Chroot setup failed
> > Error creating schroot session: skipping zope-ldapmultiplugins
> > ******************************************************************************
> >
> > Could this be caused by a race condition in schroot or sbuild ? I
> > never ran into this when I was running only one instance at a time.
> 
> While it is possible that a race condition exists, I can't find any
> reference to "Cannot create link" or /etc/mtab in either the schroot
> or sbuild sources.  I don't know where that message is coming from.
> 
> Which chroot type are you using with sbuild/schroot?  The locking can
> vary between the different types, and some (e.g. plain, directory)
> shouldn't be used if you are running sbuild in parallel, though sbuild
> itself should do its own locking in this case and catch the problem.

I'm using file chroots.
-- 
| Lucas Nussbaum
| lucas at lucas-nussbaum.net   http://www.lucas-nussbaum.net/ |
| jabber: lucas at nussbaum.fr             GPG: 1024D/023B3F4F |
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