Just getting around to looking at this, but I have been getting the following in my Cron reports for some time now:
Exception in thread Thread-1 (most likely raised during interpreter shutdown):
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
File "/usr/lib/python2.7/threading.py", line 504, in run
File ".../piwik/misc/log-analytics/import_logs.py", line 1472, in _run_bulk
File "/usr/lib/python2.7/Queue.py", line 168, in get
File "/usr/lib/python2.7/threading.py", line 236, in wait
<type 'exceptions.TypeError'>: 'NoneType' object is not callable
Ubuntu Server 12.04.5. Has been happening with Piwik for a very long time, so several versions, including the latest 2.13.1.