sensor container crash

gistfile1.txt

2015-03-20 12:56:02,971 140331965379760 INFO __init__ [-] Connecting to database "st2" @ "0.0.0.0:27017" as user "None".
2015-03-20 12:56:03,640 140331965379760 INFO utils [-] Registering exchanges...
2015-03-20 12:56:03,968 140331965379760 INFO utils [-] registered exchange st2.execution.
2015-03-20 12:56:03,969 140331965379760 INFO utils [-] registered exchange st2.liveaction.
2015-03-20 12:56:03,970 140331965379760 INFO utils [-] registered exchange st2.trigger.
2015-03-20 12:56:03,970 140331965379760 INFO utils [-] registered exchange st2.trigger_instances_dispatch.
2015-03-20 12:56:04,737 140331965379760 INFO sensormanager [-] Found 3 sensors.
2015-03-20 12:56:04,756 140331965379760 INFO manager [-] Setting up container to run 3 sensors.
2015-03-20 12:56:04,757 140331965379760 INFO manager [-] (PID:3804) SensorContainer started.
2015-03-20 12:56:04,775 140331965379760 INFO process_container [-] Running sensor HelloSensor
2015-03-20 12:56:04,839 140331965379760 AUDIT access [-] Access granted to user "sensors_container" with the token set to expire at "2015-03-21T12:56:04.819805Z".
2015-03-20 12:56:05,416 42575824 INFO triggers [-] Trigger st2.generic.actiontrigger is already registered.
2015-03-20 12:56:05,549 140331965379760 INFO process_container [-] Sensor HelloSensor started
2015-03-20 12:56:05,549 140331965379760 INFO process_container [-] Running sensor EverySixty
2015-03-20 12:56:05,635 140331965379760 AUDIT access [-] Access granted to user "sensors_container" with the token set to expire at "2015-03-21T12:56:05.609920Z".
2015-03-20 12:56:05,886 140331965379760 INFO process_container [-] Sensor EverySixty started
2015-03-20 12:56:05,886 140331965379760 INFO process_container [-] Running sensor FileWatchSensor
2015-03-20 12:56:05,982 140331965379760 AUDIT access [-] Access granted to user "sensors_container" with the token set to expire at "2015-03-21T12:56:05.956892Z".
2015-03-20 12:56:06,067 140331965379760 INFO process_container [-] Sensor FileWatchSensor started
2015-03-20 12:56:06,124 42575824 INFO triggers [-] Trigger st2.sensor.process_spawn is already registered.
2015-03-20 12:56:06,253 42575824 INFO triggers [-] Trigger st2.sensor.process_exit is already registered.
2015-03-20 12:56:10,928 140357299869648 INFO sensor_wrapper [-] Using config "/opt/stackstorm/packs/hello-st2/config.yaml" for sensor "HelloSensor"
2015-03-20 12:56:10,929 140357299869648 INFO sensor_wrapper [-] Watcher started
2015-03-20 12:56:10,929 140357299869648 INFO sensor_wrapper [-] Running sensor initialization code
2015-03-20 12:56:10,930 140357299869648 INFO sensor_wrapper [-] Running sensor in passive mode
2015-03-20 12:56:10,931 140357299869648 AUDIT sensor_wrapper [-] Retrieving value from the datastore (name=hello-st2.HelloSensor:hello-st2.count)
2015-03-20 12:56:11,058 22443984 INFO sensor_wrapper [-] Using config "/opt/stackstorm/packs/ChangeRecord/config.yaml" for sensor "EverySixty"
2015-03-20 12:56:11,084 32157200 INFO mixins [-] Connected to amqp://guest:**@127.0.0.1:5672//
2015-03-20 12:56:11,134 140357299869648 AUDIT sensor_wrapper [-] Setting value in the datastore (name=hello-st2.HelloSensor:hello-st2.count)
2015-03-20 12:56:11,155 140357299869648 WARNING sensor_wrapper [-] Sensor "HelloSensor" run method raised an exception: 503 Server Error: Service Unavailable
Unable to retrieve detailed message from the HTTP response. No JSON object could be decoded
.
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/st2reactor/container/sensor_wrapper.py", line 336, in run
    self._sensor_instance.run()
  File "/home/fedora/src/hub/packs/hello-st2/sensors/sensor1.py", line 21, in run
    self._sensor_service.set_value('hello-st2.count', payload['count'])
  File "/usr/lib/python2.7/site-packages/st2reactor/container/sensor_wrapper.py", line 188, in set_value
    client.keys.update(instance=instance)
  File "/usr/lib/python2.7/site-packages/st2client/models/core.py", line 33, in decorate
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/st2client/models/core.py", line 245, in update
    self.handle_error(response)
  File "/usr/lib/python2.7/site-packages/st2client/models/core.py", line 127, in handle_error
    response.raise_for_status()
  File "/usr/lib/python2.7/site-packages/requests/models.py", line 831, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
HTTPError: 503 Server Error: Service Unavailable
Unable to retrieve detailed message from the HTTP response. No JSON object could be decoded

2015-03-20 12:56:11,157 140357299869648 INFO sensor_wrapper [-] Stopping trigger watcher
2015-03-20 12:56:11,194 140357299869648 INFO sensor_wrapper [-] Invoking cleanup on sensor
2015-03-20 12:56:16,073 140331965379760 INFO process_container [-] Process for sensor HelloSensor has exited with code 1
2015-03-20 12:56:16,077 140331965379760 INFO process_container [-] Process for sensor EverySixty has exited with code 1
2015-03-20 12:56:16,084 140331965379760 INFO process_container [-] Process for sensor FileWatchSensor has exited with code 1
2015-03-20 12:56:21,093 140331965379760 INFO process_container [-] Container has no active sensors running.
2015-03-20 12:56:21,093 140331965379760 INFO manager [-] (PID:3804) SensorContainer stopped. Reason - run ended.

Any solution found?