Hello,
I am currently experiencing an issue with my scheduler workers crashing on 
startup with the following error:

Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 801, in __bootstrap_inner
    self.run()
  File "/usr/share/vidjil/server/web2py/gluon/scheduler.py", line 637, in 
run
    self.send_heartbeat(counter)
  File "/usr/share/vidjil/server/web2py/gluon/scheduler.py", line 1161, in 
send_heartbeat
    self.db._uri, folder=self.db._adapter.folder, decode_credentials=True)
  File "/usr/share/vidjil/server/web2py/gluon/packages/dal/pydal/base.py", 
line 169, in __call__
    obj = super(MetaDAL, cls).__call__(*args, **kwargs)
  File "/usr/share/vidjil/server/web2py/gluon/packages/dal/pydal/base.py", 
line 474, in __init__
    "Failure to connect, tried %d times:\n%s" % (attempts, tb)
RuntimeError: Failure to connect, tried 5 times:
Traceback (most recent call last):
  File "/usr/share/vidjil/server/web2py/gluon/packages/dal/pydal/base.py", 
line 454, in __init__
    self._adapter = adapter(**kwargs)
  File 
"/usr/share/vidjil/server/web2py/gluon/packages/dal/pydal/adapters/__init__.py"
, line 40, in __call__
    obj = super(AdapterMeta, cls).__call__(*args, **kwargs)
  File 
"/usr/share/vidjil/server/web2py/gluon/packages/dal/pydal/adapters/base.py", 
line 368, in __init__
    super(SQLAdapter, self).__init__(*args, **kwargs)
  File 
"/usr/share/vidjil/server/web2py/gluon/packages/dal/pydal/adapters/base.py", 
line 50, in __init__
    self._initialize_(do_connect)
  File 
"/usr/share/vidjil/server/web2py/gluon/packages/dal/pydal/adapters/mysql.py"
, line 24, in _initialize_
    user = self.credential_decoder(m.group('user'))
  File "/usr/share/vidjil/server/web2py/gluon/packages/dal/pydal/base.py", 
line 403, in <lambda>
    credential_decoder = lambda cred: urllib.unquote(cred)
NameError: global name 'urllib' is not defined

The workers are running inside a docker container and are started with the 
following command:
/usr/local/bin/gosu www-data python web2py.py -K myapp


I have made sure urllib is correctly installed, and as far as I can tell, 
it is. Or at least running a python shell and importing the module works. 
Does anyone have any insight as to why this might be happening ?

Thanks

-- 
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