[ubuntu-studio-devel] CD image ubuntustudio/xenial/dvd failed to build on 20160911

[CD Image]

===== Building live filesystems =====
Sun Sep 11 17:27:01 UTC 2016
ubuntustudio-amd64 on Launchpad starting at 2016-09-11 17:27:01
ubuntustudio-amd64: https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/xenial/ubuntustudio/+build/75178
ubuntustudio-i386 on Launchpad starting at 2016-09-11 17:27:36
ubuntustudio-i386: https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/xenial/ubuntustudio/+build/75179
ubuntustudio-amd64 on Launchpad finished at 2016-09-11 17:59:12 (Successfully built)
ubuntustudio-i386 on Launchpad finished at 2016-09-11 18:36:55 (Successfully built)
Unable to contact tracker: <ProtocolError for iso.qa.ubuntu.com/xmlrpc.php: 502 Bad Gateway>
===== Parallel build; waiting for Ubuntu-Studio mirror to sync =====
Sun Sep 11 18:57:41 UTC 2016
lockfile: Sorry, giving up on "/srv/cdimage.ubuntu.com/etc/.lock-archive-sync"
Timed out waiting for archive sync lock!
Traceback (most recent call last):
  File "/srv/cdimage.ubuntu.com/bin/../lib/cdimage/build.py", line 720, in build_image_set_locked
    sync_local_mirror(config, multipidfile_state)
  File "/srv/cdimage.ubuntu.com/bin/../lib/cdimage/build.py", line 266, in sync_local_mirror
    subprocess.check_call(["lockfile", "-8", "-r", "450", sync_lock])
  File "/usr/lib/python2.7/subprocess.py", line 511, in check_call
    raise CalledProcessError(retcode, cmd)
CalledProcessError: Command '['lockfile', '-8', '-r', '450', '/srv/cdimage.ubuntu.com/etc/.lock-archive-sync']' returned non-zero exit status 73