diff --git a/IPython/parallel/apps/baseapp.py b/IPython/parallel/apps/baseapp.py
index 614fa7f..203b9af 100755
--- a/IPython/parallel/apps/baseapp.py
+++ b/IPython/parallel/apps/baseapp.py
@@ -162,6 +162,10 @@ class BaseParallelApplication(BaseIPythonApplication):
             self._log_formatter = logging.Formatter("[%(name)s] %(message)s")
             self._log_handler.setFormatter(self._log_formatter)
             self.log.addHandler(self._log_handler)
+        # do not propagate log messages to root logger
+        # ipcluster app will sometimes print duplicate messages during shutdown
+        # if this is 1 (default):
+        self.log.propagate = False
 
     def write_pid_file(self, overwrite=False):
         """Create a .pid file in the pid_dir with my pid.
diff --git a/IPython/parallel/util.py b/IPython/parallel/util.py
index fb83640..b9a5153 100644
--- a/IPython/parallel/util.py
+++ b/IPython/parallel/util.py
@@ -40,6 +40,7 @@ import zmq
 from zmq.log import handlers
 
 # IPython imports
+from IPython.config.application import Application
 from IPython.utils.pickleutil import can, uncan, canSequence, uncanSequence
 from IPython.utils.newserialized import serialize, unserialize
 from IPython.zmq.log import EnginePUBHandler
@@ -391,7 +392,8 @@ def select_random_ports(n):
 def signal_children(children):
     """Relay interupt/term signals to children, for more solid process cleanup."""
     def terminate_children(sig, frame):
-        logging.critical("Got signal %i, terminating children..."%sig)
+        log = Application.instance().log
+        log.critical("Got signal %i, terminating children..."%sig)
         for child in children:
             child.terminate()