[buildd-tools-devel] Bug#602891: Bug#602891: Bug#602891: [ovs-dev] Bug#602891: openvswitch: FTBFS on all arches

[Roger Leigh]

On Tue, Nov 09, 2010 at 09:33:33PM +0000, Roger Leigh wrote:
> On Tue, Nov 09, 2010 at 01:21:59PM -0800, Ben Pfaff wrote:
> > On Tue, Nov 09, 2010 at 09:26:25PM +0100, Sebastian Andrzej Siewior wrote:
> > > I just built via
> > > | sbuild --apt-update --batch --dist=unstable --arch=powerpcspe \
> > > |    openvswitch_1.1.0~pre2-2
> > > and got the same error message. On buildds it hang in the perl test case
> > > but here it continued. I just tar _my_ folder and it available at [0] in
> > > case it is any help for you.
> > 
> > Thanks for the hint.  I was able to reproduce the problem locally with
> > sbuild.  I'm sure that I can track it down now.
> 
> Looking at the logs, it may be the case that it's due to
> path length restrictions on UNIX domain socket filenames.  I'm
> checking if that's the case now.  If so, I suggest that any
> sockets are created in /tmp or TMPDIR rather than the build
> tree to avoid such issues.  TMPDIR can always be set to /tmp.
> 
> Since sbuild/buildd build in
> /build/$user-$package_$version-$arch-XXXXX/$package_$version, that's a
> large chunk of the (114? char length) socket restriction.
> 
> We've had this issue before.  Ultimately:
> - we can mitigate the restriction by making the path shorter, but
>   we can't make any guarantees even than since package names and
>   version numbers don't have any fixed limit.  You still have to
>   factor in the relative path length under the build tree as well.
> - using a guaranteed short path under /tmp is the only way to ensure
>   success.  My home dir at work is over five levels deep from the
>   root, so upstream really should deal with the limitation since
>   users don't always have the choice of shortening the path.

Confirmed, at least for path length limits:

/tmp/openvswitch-1.1.0~pre2 works
/tmp/XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/openvswitch-1.1.0~pre2 fails

This isn't an sbuild issue, and we can't reliably work around it in
sbuild either, for the reasons stated above.


Regards,
Roger

-- 
  .''`.  Roger Leigh
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