database is locked

Keep seeing database is locked error.

Process Process-2:
Traceback (most recent call last):
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/process.py", line 267, in _bootstrap
self.run()
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/process.py", line 114, in run
self._target(*self._args, **self._kwargs)
File "/Users/peter/Downloads/trape/core/user.py", line 200, in getHostsAlive
hDB.sentences_victim('delete_hostalive', vId, 2)
File "/Users/peter/Downloads/trape/core/db.py", line 153, in sentences_victim
return self.sql_insert(self.prop_sentences_victim(type, data))
File "/Users/peter/Downloads/trape/core/db.py", line 54, in sql_insert
self.cursor.execute(sentence[0], sentence[1])
OperationalError: database is locked

Start with core/user.py around getHostsAlive and core/db.py around sentences_victim and sql_insert, following the reported traceback. Reproduce the multiprocessing scenario that raises OperationalError: database is locked, then confirm the reported operation completes without that error.

Written by the indexing model from the issue text.