2015-12-14 02:16:02,188 DEBUG nodepool.stack_dump: Thread: DiskImageBuilder queue (139903216101120)
  File "/usr/lib64/python2.7/threading.py", line 784, in __bootstrap
    self.__bootstrap_inner()
  File "/usr/lib64/python2.7/threading.py", line 811, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/site-packages/nodepool/nodepool.py", line 841, in run
    image_id = self.queue.get()
  File "/usr/lib64/python2.7/Queue.py", line 168, in get
    self.not_empty.wait()
  File "/usr/lib64/python2.7/threading.py", line 339, in wait
    waiter.acquire()
Thread: Gearman client connect (139903232886528)
  File "/usr/lib64/python2.7/threading.py", line 784, in __bootstrap
    self.__bootstrap_inner()
  File "/usr/lib64/python2.7/threading.py", line 811, in __bootstrap_inner
    self.run()
  File "/usr/lib64/python2.7/threading.py", line 764, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.7/site-packages/gear/__init__.py", line 739, in _doConnectLoop
    self.connections_condition.wait()
  File "/usr/lib64/python2.7/threading.py", line 339, in wait
    waiter.acquire()
Thread: NodePool (139903654074112)
  File "/usr/lib64/python2.7/threading.py", line 784, in __bootstrap
    self.__bootstrap_inner()
  File "/usr/lib64/python2.7/threading.py", line 811, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/site-packages/nodepool/nodepool.py", line 1906, in run
    time.sleep(self.watermark_sleep)
Thread: MainThread (139903959209792)
  File "/bin/nodepoold", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/site-packages/nodepool/cmd/nodepoold.py", line 154, in main
    npd.main()
  File "/usr/lib/python2.7/site-packages/nodepool/cmd/nodepoold.py", line 137, in main
    signal.pause()
  File "/usr/lib/python2.7/site-packages/nodepool/cmd/nodepoold.py", line 52, in stack_dump_handler
    log_str += "".join(traceback.format_stack(stack_frame))
Thread: jenkins01 (139903623878400)
  File "/usr/lib64/python2.7/threading.py", line 784, in __bootstrap
    self.__bootstrap_inner()
  File "/usr/lib64/python2.7/threading.py", line 811, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/site-packages/nodepool/task_manager.py", line 84, in run
    task = self.queue.get()
  File "/usr/lib64/python2.7/Queue.py", line 168, in get
    self.not_empty.wait()
  File "/usr/lib64/python2.7/threading.py", line 339, in wait
    waiter.acquire()
Thread: oslab (139903640663808)
  File "/usr/lib64/python2.7/threading.py", line 784, in __bootstrap
    self.__bootstrap_inner()
  File "/usr/lib64/python2.7/threading.py", line 811, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/site-packages/nodepool/task_manager.py", line 84, in run
    task = self.queue.get()
  File "/usr/lib64/python2.7/Queue.py", line 168, in get
    self.not_empty.wait()
  File "/usr/lib64/python2.7/threading.py", line 339, in wait
    waiter.acquire()
Thread: Gearman client poll (139903241279232)
  File "/usr/lib64/python2.7/threading.py", line 784, in __bootstrap
    self.__bootstrap_inner()
  File "/usr/lib64/python2.7/threading.py", line 811, in __bootstrap_inner
    self.run()
  File "/usr/lib64/python2.7/threading.py", line 764, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.7/site-packages/gear/__init__.py", line 821, in _doPollLoop
    self._pollLoop()
  File "/usr/lib/python2.7/site-packages/gear/__init__.py", line 847, in _pollLoop
    ret = poll.poll()
Thread: jenkins02 (139903632271104)
  File "/usr/lib64/python2.7/threading.py", line 784, in __bootstrap
    self.__bootstrap_inner()
  File "/usr/lib64/python2.7/threading.py", line 811, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/site-packages/nodepool/task_manager.py", line 84, in run
    task = self.queue.get()
  File "/usr/lib64/python2.7/Queue.py", line 168, in get
    self.not_empty.wait()
  File "/usr/lib64/python2.7/threading.py", line 339, in wait
    waiter.acquire()