Package: cowdancer
Version: 0.44
Severity: normal
When several cowbuilder instances are started in parallel, dpkg/aptitude
in each instance will try to lock its lock file. However, since the
files are linked across chroots, only the first succeeds and all other
fail with
Could not get lock /var/lib/dpkg/lock - open (11 Resource
temporarily unavailable)
The strace output is
fcntl64(4, F_SETLK, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}) =
-1 EAGAIN (Resource temporarily unavailable)
As a workaround, it seems to be possible to do
rm /var/cache/pbuilder/base.cow/var/lib/dpkg/lock
rm /var/cache/pbuilder/base.cow/var/lock/aptitude
But it would be better if cowdancer would implicitly copy a file if
a process in the chroot tries to lock it.
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