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

[Roger Leigh]

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.


Regards,
Roger

-- 
  .''`.  Roger Leigh
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