[2015-04-27 15:03:56,927: ERROR/MainProcess] Task tarjeta.tasks.demon_2[4d6cb246-cf34-4f70-a5a5-d56677287041] raised unexpected: WorkerLostError('Worker exited prematurely: signal 9 (SIGKILL).',)
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/billiard/pool.py", line 1169, in mark_as_worker_lost
    human_status(exitcode)),