Task: crashed but not reaped

slave log

I0827 23:42:46.648185 70000640 exec.cpp:293] Executor asked to run task '00000-crwl'
I0827 23:42:46.648599 70000640 exec.cpp:302] Executor::launchTask took 415us
I0827 23:42:46.648707 68927488 process.cpp:2771] Resuming executor(1)@192.168.178.36:58556 at 2014-08-27 21:42:46.648720128+00:00
I0827 23:42:46.656939 68927488 exec.cpp:525] Executor sending status update TASK_RUNNING (UUID: 31a53d20-45de-4a30-8d9d-d41a77e7222c) for task 00000-crwl of framework 20140827-112812-16777343-5050-71902-0016
I0827 23:42:46.657642 72683520 pid.cpp:87] Attempting to parse 'slave(1)@192.168.178.36:5051' into a PID
I0827 23:42:46.657665 72683520 process.cpp:875] Parsed message name 'mesos.internal.StatusUpdateAcknowledgementMessage' for executor(1)@192.168.178.36:58556 from slave(1)@192.168.178.36:5051
I0827 23:42:46.657691 71073792 process.cpp:2771] Resuming executor(1)@192.168.178.36:58556 at 2014-08-27 21:42:46.657704960+00:00
I0827 23:42:46.657695 70537216 process.cpp:2771] Resuming __gc__@192.168.178.36:58556 at 2014-08-27 21:42:46.657705984+00:00
I0827 23:42:46.657727 71073792 exec.cpp:339] Executor received status update acknowledgement 31a53d20-45de-4a30-8d9d-d41a77e7222c for task 00000-crwl of framework 20140827-112812-16777343-5050-71902-0016
I0827 23:42:46.657742 72683520 process.cpp:2761] Spawned process __http__(2)@192.168.178.36:58556
I0827 23:42:46.657747 71610368 process.cpp:2771] Resuming __http__(2)@192.168.178.36:58556 at 2014-08-27 21:42:46.657758976+00:00
I0827 23:42:46.657770 72683520 process.cpp:1084] Socket closed while receiving
I0827 23:42:46.657822 71610368 process.cpp:2771] Resuming __http__(2)@192.168.178.36:58556 at 2014-08-27 21:42:46.657833216+00:00
I0827 23:42:46.657845 71610368 process.cpp:2878] Cleaning up __http__(2)@192.168.178.36:58556
I0827 23:42:46.657892 68927488 process.cpp:2771] Resuming __gc__@192.168.178.36:58556 at 2014-08-27 21:42:46.657900032+00:00
Exception in thread Thread-1:
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 808, in __bootstrap_inner
    self.run()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 761, in run
    self.__target(*self.__args, **self.__kwargs)
  File "crawl_executor.py", line 73, in run_task
    soup = BeautifulSoup(source)
TypeError: 'module' object is not callable

I0827 23:43:21.717475 72683520 pid.cpp:87] Attempting to parse 'slave(1)@192.168.178.36:5051' into a PID
I0827 23:43:21.717520 72683520 process.cpp:875] Parsed message name 'mesos.internal.ShutdownExecutorMessage' for executor(1)@192.168.178.36:58556 from slave(1)@192.168.178.36:5051
I0827 23:43:21.717564 70000640 process.cpp:2771] Resuming executor(1)@192.168.178.36:58556 at 2014-08-27 21:43:21.717575168+00:00
I0827 23:43:21.717566 71610368 process.cpp:2771] Resuming __gc__@192.168.178.36:58556 at 2014-08-27 21:43:21.717576960+00:00
I0827 23:43:21.717592 70000640 exec.cpp:379] Executor asked to shutdown