XML incompatible + no exit on keyboard interrupt

sir.reindex.log

2019-05-15 13:12:32,157: Checking whether the versions of the Solr cores are supported
2019-05-15 13:12:44,462: All strings must be XML compatible: Unicode or ASCII, no NULL bytes or control characters
Traceback (most recent call last):
  File "sir/indexing.py", line 149, in _multiprocessed_import
    for r in results:
  File "/usr/local/lib/python2.7/multiprocessing/pool.py", line 668, in next
    raise value
ValueError: All strings must be XML compatible: Unicode or ASCII, no NULL bytes or control characters

^CProcess Solr-1:
Process Solr-0:
Process PoolWorker-155:
Traceback (most recent call last):
Process PoolWorker-156:
  File "/usr/local/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/local/lib/python2.7/multiprocessing/process.py", line 114, in run
    self.run()
  File "/usr/local/lib/python2.7/multiprocessing/process.py", line 114, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python2.7/multiprocessing/pool.py", line 102, in worker
    self._target(*self._args, **self._kwargs)
    task = get()
  File "/usr/local/lib/python2.7/multiprocessing/queues.py", line 378, in get
  File "/usr/local/lib/python2.7/multiprocessing/pool.py", line 102, in worker
    task = get()
  File "/usr/local/lib/python2.7/multiprocessing/queues.py", line 376, in get
    racquire()
    return recv()
KeyboardInterrupt
KeyboardInterrupt
Traceback (most recent call last):
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/local/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/local/lib/python2.7/multiprocessing/process.py", line 114, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/local/lib/python2.7/multiprocessing/process.py", line 114, in run
  File "sir/indexing.py", line 272, in queue_to_solr
    self._target(*self._args, **self._kwargs)
  File "sir/indexing.py", line 272, in queue_to_solr
    item = queue.get()
  File "<string>", line 2, in get
  File "/usr/local/lib/python2.7/multiprocessing/managers.py", line 759, in _callmethod
    item = queue.get()
  File "<string>", line 2, in get
  File "/usr/local/lib/python2.7/multiprocessing/managers.py", line 759, in _callmethod
    kind, result = conn.recv()
KeyboardInterrupt
    kind, result = conn.recv()
KeyboardInterrupt