diff --git a/heat/openstack/common/eventlet_backdoor.py b/heat/openstack/common/eventlet_backdoor.py
index c321690f15..b4692d23e2 100644
--- a/heat/openstack/common/eventlet_backdoor.py
+++ b/heat/openstack/common/eventlet_backdoor.py
@@ -143,7 +143,7 @@ def initialize_if_enabled():
     # listen().  In any case, pull the port number out here.
     port = sock.getsockname()[1]
     LOG.info(
-        _LI('Eventlet backdoor listening on %(port)s for process %(pid)d') %
+        _LI('Eventlet backdoor listening on %(port)s for process %(pid)d'),
         {'port': port, 'pid': os.getpid()}
     )
     eventlet.spawn_n(eventlet.backdoor.backdoor_server, sock,
diff --git a/heat/openstack/common/loopingcall.py b/heat/openstack/common/loopingcall.py
index fedcb803f6..eb37709faf 100644
--- a/heat/openstack/common/loopingcall.py
+++ b/heat/openstack/common/loopingcall.py
@@ -84,9 +84,9 @@ class FixedIntervalLoopingCall(LoopingCallBase):
                         break
                     delay = end - start - interval
                     if delay > 0:
-                        LOG.warn(_LW('task %(func_name)r run outlasted '
-                                     'interval by %(delay).2f sec'),
-                                 {'func_name': self.f, 'delay': delay})
+                        LOG.warning(_LW('task %(func_name)r run outlasted '
+                                        'interval by %(delay).2f sec'),
+                                    {'func_name': self.f, 'delay': delay})
                     greenthread.sleep(-delay if delay < 0 else 0)
             except LoopingCallDone as e:
                 self.stop()
diff --git a/heat/openstack/common/threadgroup.py b/heat/openstack/common/threadgroup.py
index cc2307933a..074305f09a 100644
--- a/heat/openstack/common/threadgroup.py
+++ b/heat/openstack/common/threadgroup.py
@@ -17,6 +17,7 @@ import threading
 import eventlet
 from eventlet import greenpool
 
+from heat.openstack.common._i18n import _LE
 from heat.openstack.common import loopingcall
 
 
@@ -98,15 +99,15 @@ class ThreadGroup(object):
                 x.stop()
             except eventlet.greenlet.GreenletExit:
                 pass
-            except Exception as ex:
-                LOG.exception(ex)
+            except Exception:
+                LOG.exception(_LE('Error stopping thread.'))
 
     def stop_timers(self):
         for x in self.timers:
             try:
                 x.stop()
-            except Exception as ex:
-                LOG.exception(ex)
+            except Exception:
+                LOG.exception(_LE('Error stopping timer.'))
         self.timers = []
 
     def stop(self, graceful=False):
@@ -132,8 +133,8 @@ class ThreadGroup(object):
                 x.wait()
             except eventlet.greenlet.GreenletExit:
                 pass
-            except Exception as ex:
-                LOG.exception(ex)
+            except Exception:
+                LOG.exception(_LE('Error waiting on ThreadGroup.'))
         current = threading.current_thread()
 
         # Iterate over a copy of self.threads so thread_done doesn't
diff --git a/openstack-common.conf b/openstack-common.conf
index 9804de3188..8b393646b1 100644
--- a/openstack-common.conf
+++ b/openstack-common.conf
@@ -6,7 +6,6 @@ module=eventlet_backdoor
 module=loopingcall
 module=service
 module=threadgroup
-module=versionutils
 
 # The base module to hold the copy of openstack.common
 base=heat