RuntimeError: Concurrent access to R is not allowed.

[Fclem]

View details in Rollbar: https://rollbar.com/fclem/Breeze/items/333/

Traceback (most recent call last):
  File "/homes/breeze/code/venv/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 111, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/homes/breeze/code/venv/local/lib/python2.7/site-packages/django/contrib/auth/decorators.py", line 20, in _wrapped_view
    return view_func(request, *args, **kwargs)
  File "/homes/breeze/code/isbio/breeze/views.py", line 692, in ajax_patients_data
    data_tbl = rora.get_patients_info(params, str(which))
  File "/homes/breeze/code/isbio/breeze/rora.py", line 159, in get_patients_info
    row_values = exported_data.rx(row, True)
  File "/homes/breeze/code/venv/local/lib/python2.7/site-packages/rpy2/robjects/vectors.py", line 55, in __call__
    conv_args[i] = conversion.py2ro(x)
  File "/homes/breeze/code/venv/local/lib/python2.7/site-packages/rpy2/robjects/__init__.py", line 161, in default_py2ro
    return conversion.ri2py(res)
  File "/homes/breeze/code/venv/local/lib/python2.7/site-packages/rpy2/robjects/__init__.py", line 90, in default_ri2py
    res = vectors.Vector(o)
  File "/homes/breeze/code/venv/local/lib/python2.7/site-packages/rpy2/robjects/vectors.py", line 222, in __init__
    super(Vector, self).__init__(o)
RuntimeError: Concurrent access to R is not allowed.