Traceback (most recent call last):
  File "/home/users/sio2/sio2/deployment/manage.py", line 14, in <module>
    execute_from_command_line(sys.argv)
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/home/users/sio2/sio2/venv/src/oioioi/oioioi/workers/management/commands/start_receive_from_workers.py", line 43, in handle
    settings.SIOWORKERS_LISTEN_PORT), Handler)
  File "/usr/lib/python2.7/SocketServer.py", line 419, in __init__
    self.server_bind()
  File "/usr/lib/python2.7/SocketServer.py", line 430, in server_bind
    self.socket.bind(self.server_address)
  File "/usr/lib/python2.7/socket.py", line 224, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 98] Address already in use
Traceback (most recent call last):
  File "/home/users/sio2/sio2/deployment/manage.py", line 14, in <module>
    execute_from_command_line(sys.argv)
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/home/users/sio2/sio2/venv/src/oioioi/oioioi/workers/management/commands/start_receive_from_workers.py", line 43, in handle
    settings.SIOWORKERS_LISTEN_PORT), Handler)
  File "/usr/lib/python2.7/SocketServer.py", line 419, in __init__
    self.server_bind()
  File "/usr/lib/python2.7/SocketServer.py", line 430, in server_bind
    self.socket.bind(self.server_address)
  File "/usr/lib/python2.7/socket.py", line 224, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 98] Address already in use
Traceback (most recent call last):
  File "/home/users/sio2/sio2/deployment/manage.py", line 14, in <module>
    execute_from_command_line(sys.argv)
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/home/users/sio2/sio2/venv/local/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/home/users/sio2/sio2/venv/src/oioioi/oioioi/workers/management/commands/start_receive_from_workers.py", line 43, in handle
    settings.SIOWORKERS_LISTEN_PORT), Handler)
  File "/usr/lib/python2.7/SocketServer.py", line 419, in __init__
    self.server_bind()
  File "/usr/lib/python2.7/SocketServer.py", line 430, in server_bind
    self.socket.bind(self.server_address)
  File "/usr/lib/python2.7/socket.py", line 224, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 98] Address already in use