pool.map() из многопроцессорной библиотеки python вызывает ошибку JSON

Question

Я использую многопроцессорную библиотеку, что очень затрудняет отладку ошибки при ее возникновении. Простая структура кода:

import multiprocessing
from multiprocessing import Pool
import traceback

def myFunction(row):
    try:
       # Create some log strings from row
       string = "[time]: "+row[0]
       # Send log strings to a file
    except Exception as e:
       print "Caught Exception"
       traceback.print_exc()
       print()
       raise e
no_processors = multiprocessing.cpu_count()
with closing(Pool(processes=no_processors)) as pool:
    pool.map(myFunction, list)

Тем не менее, я получаю эту ошибку при запуске:

Caught exception in worker thread (row = 0):
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/py2neo/packages/httpstream/http.py", line 634, in read
  File "filename.multi2.py", line 190, in myFunction
    data = self._response.read()
  File "/usr/lib/python2.7/httplib.py", line 543, in read
    tx.execute()
  File "/usr/local/lib/python2.7/dist-packages/py2neo/cypher.py", line 233, in execute
    return self._post(self._execute or self._begin)
  File "/usr/local/lib/python2.7/dist-packages/py2neo/cypher.py", line 208, in _post
    j = rs.json
  File "/usr/local/lib/python2.7/dist-packages/py2neo/packages/httpstream/http.py", line 562, in json
    return self._read_chunked(amt)
    raise TypeError("Content is not JSON")
TypeError: Content is not JSON
  File "/usr/lib/python2.7/httplib.py", line 597, in _read_chunked
()
    raise IncompleteRead(''.join(value))
IncompleteRead: IncompleteRead(198 bytes read)
()

    pool.map(myFunction, list)
  File "/usr/lib/python2.7/multiprocessing/pool.py", line 251, in map
    return self.map_async(func, iterable, chunksize).get()
  File "/usr/lib/python2.7/multiprocessing/pool.py", line 558, in get
    raise self._value
TypeError: Content is not JSON

Кто-нибудь знает причину / решение?