Description of problem:

All yumdownloader commands fail in Rawhide for some bizarre reason,
since yesterday.  This has only been seen on i686.

The error is:

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/urlgrabber/grabber.py", line 1307, in _retrieve
    self.fo.write(buf.decode('utf-8'))
  File "/usr/lib/python2.7/encodings/utf_8.py", line 16, in decode
    return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xd2 in position 16: invalid continuation byte
file:///builddir/build/BUILD/libguestfs-1.27.34/repo/repodata/5687369b77501c31620f70fb1036e9e39471969b5e9b3672472f7dfbef610dfc-primary.sqlite.bz2: [Errno 14] curl#23 - "Failed writing body (0 != 16383)"
Trying other mirror.
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/urlgrabber/grabber.py", line 1307, in _retrieve
    self.fo.write(buf.decode('utf-8'))
  File "/usr/lib/python2.7/encodings/utf_8.py", line 16, in decode
    return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xd2 in position 16: invalid continuation byte
file:///builddir/build/BUILD/libguestfs-1.27.34/repo/repodata/5687369b77501c31620f70fb1036e9e39471969b5e9b3672472f7dfbef610dfc-primary.sqlite.bz2: [Errno 14] curl#23 - "Failed writing body (0 != 16383)"
Trying other mirror.
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/urlgrabber/grabber.py", line 1307, in _retrieve
    self.fo.write(buf.decode('utf-8'))
  File "/usr/lib/python2.7/encodings/utf_8.py", line 16, in decode
    return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xd2 in position 16: invalid continuation byte
file:///builddir/build/BUILD/libguestfs-1.27.34/repo/repodata/5687369b77501c31620f70fb1036e9e39471969b5e9b3672472f7dfbef610dfc-primary.sqlite.bz2: [Errno 14] curl#23 - "Failed writing body (0 != 16383)"
Trying other mirror.
failure: repodata/5687369b77501c31620f70fb1036e9e39471969b5e9b3672472f7dfbef610dfc-primary.sqlite.bz2 from local: [Errno 256] No more mirrors to try.
file:///builddir/build/BUILD/libguestfs-1.27.34/repo/repodata/5687369b77501c31620f70fb1036e9e39471969b5e9b3672472f7dfbef610dfc-primary.sqlite.bz2: [Errno 14] curl#23 - "Failed writing body (0 != 16383)"
supermin: /usr/bin/yumdownloader -c '/builddir/build/BUILD/libguestfs-1.27.34/yum.conf' --destdir '/tmp/supermine6e4e6.tmpdir/9tcf1x40' 'e2fsprogs.i686' 'iproute.i686' 'nilfs-utils.i686' 'openssh-clients.i686' 'syslinux-extlinux.i686' 'systemd.i686' 'vim-minimal.i686' 'zfs-fuse.i686' 'bash.i686' 'coreutils.i686' 'file.i686' 'grep.i686' 'lvm2.i686' 'mdadm.i686' 'util-linux.i686' 'audit-libs.i686' 'dbus.i686' 'fuse.i686' 'glibc.i686' 'glibc-common.i686' 'groff-base.i686' 'info.i686' 'iptables.i686' 'krb5-libs.i686' 'libattr.i686' 'libpwquality.i686' 'libuser.i686' 'mtools.i686' 'openldap.i686' 'openssh.i686' 'openssl-libs.i686' 'pam.i686' 'shadow-utils.i686' 'crypto-policies.noarch' 'dracut.i686' 'libsemanage.i686' 'nss.i686' 'setup.noarch' 'trousers.i686' 'fedora-release.noarch' 'fedora-repos.noarch' 'fedora-repos-rawhide.noarch': command failed, see earlier errors

Version-Release number of selected component (if applicable):

yum-utils 1.1.31-24.fc21

How reproducible:

100%

Steps to Reproduce:
1. See yumdownloader command at the end of that trace above.