a11y scanner freezes on certain domains about domain-scan HOT 7 OPEN

[afadvantage.gov][a11y]
the_domain_is_cached: False
the_cache_is_not_forced: True
	Not cached.
[afadvantage.gov][a11y]
^CTraceback (most recent call last):
  File "./scan", line 178, in <module>
    run(options)
  File "./scan", line 84, in run
    scan_domains(scans, domains)
  File "./scan", line 142, in scan_domains
    executor.map(process_scan, tasks)
  File "/usr/lib/python3.4/concurrent/futures/_base.py", line 574, in __exit__
    self.shutdown(wait=True)
  File "/usr/lib/python3.4/concurrent/futures/thread.py", line 131, in shutdown
    t.join()
  File "/usr/lib/python3.4/threading.py", line 1060, in join
    self._wait_for_tstate_lock()
  File "/usr/lib/python3.4/threading.py", line 1076, in _wait_for_tstate_lock
    elif lock.acquire(block, timeout):
KeyboardInterrupt
Writing to cache: afadvantage.gov
Writing data for afadvantage.gov

[bankhelp.gov][a11y]
the_domain_is_cached: False
the_cache_is_not_forced: True
	Not cached.
[bankhelp.gov][a11y]
Writing to cache: bankhelp.gov
Writing data for bankhelp.gov
[banknet.gov][a11y]
the_domain_is_cached: False
the_cache_is_not_forced: True
	Not cached.
[banknet.gov][a11y]
^CError in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/usr/lib/python3.4/concurrent/futures/thread.py", line 38, in _python_exit
    t.join()
  File "/usr/lib/python3.4/threading.py", line 1060, in join
    self._wait_for_tstate_lock()
  File "/usr/lib/python3.4/threading.py", line 1076, in _wait_for_tstate_lock
    elif lock.acquire(block, timeout):
KeyboardInterrupt

afadvantage.gov
banknet.gov
biomassboard.gov
dea.gov
export.gov
flightschoolcandidates.gov
grantsolutions.gov
gsaadvantage.gov
gsaauctions.gov
hrsa.gov
hydrogen.gov
idmanagement.gov
nationalbank.gov
pay.gov
realestatesales.gov
safetyact.gov
sciencebase.gov
selectusa.gov
stopfakes.gov
usdebitcard.gov