diff --git a/senlin_dashboard/cluster/clusters/forms.py b/senlin_dashboard/cluster/clusters/forms.py
index 33b4b427..21bcbd78 100644
--- a/senlin_dashboard/cluster/clusters/forms.py
+++ b/senlin_dashboard/cluster/clusters/forms.py
@@ -86,10 +86,10 @@ class CreateForm(forms.SelfHandlingForm):
             msg = _('Creating cluster "%s" successfully') % data['name']
             messages.success(request, msg)
             return cluster
-        except Exception as e:
+        except Exception:
             redirect = reverse(INDEX_URL)
             exceptions.handle(request,
-                              _("Unable to create cluster: %s") % e,
+                              _("Unable to create cluster."),
                               redirect=redirect)
 
 
@@ -124,8 +124,8 @@ class ManagePoliciesForm(forms.SelfHandlingForm):
                                        "cluster": data['cluster_id']}
             messages.success(request, msg)
             return attach
-        except Exception as e:
+        except Exception:
             redirect = reverse(INDEX_URL)
             exceptions.handle(request,
-                              _("Unable to attach policy: %s") % e,
+                              _("Unable to attach policy."),
                               redirect=redirect)
diff --git a/senlin_dashboard/cluster/clusters/views.py b/senlin_dashboard/cluster/clusters/views.py
index 7339d0ba..0d3e4172 100644
--- a/senlin_dashboard/cluster/clusters/views.py
+++ b/senlin_dashboard/cluster/clusters/views.py
@@ -57,10 +57,10 @@ class IndexView(tables.DataTableView):
                 paginate=True,
                 reversed_order=reversed_order,
                 filters=filters)
-        except Exception as e:
+        except Exception:
             self._prev = self._more = False
             clusters = []
-            msg = _('Unable to retrieve clusters: %s') % e
+            msg = _('Unable to retrieve clusters.')
             exceptions.handle(self.request, msg)
         return clusters
 
@@ -91,8 +91,8 @@ class DetailView(tabs.TabView):
             cluster = senlin.cluster_get(self.request, cluster_id)
             cluster.profile_url = reverse_lazy(self.profile_url,
                                                args=[cluster.profile_id])
-        except Exception as e:
-            msg = _("Unable to retrieve cluster: %s") % e
+        except Exception:
+            msg = _("Unable to retrieve cluster.")
             url = reverse_lazy(clusters_forms.INDEX_URL)
             exceptions.handle(self.request, msg, redirect=url)
         return cluster
diff --git a/senlin_dashboard/cluster/nodes/forms.py b/senlin_dashboard/cluster/nodes/forms.py
index 986674b5..8a552f57 100644
--- a/senlin_dashboard/cluster/nodes/forms.py
+++ b/senlin_dashboard/cluster/nodes/forms.py
@@ -85,10 +85,10 @@ class CreateForm(forms.SelfHandlingForm):
             msg = _('Creating node "%s" successfully') % data['name']
             messages.info(request, msg)
             return node
-        except Exception as e:
+        except Exception:
             redirect = reverse("horizon:cluster:nodes:index")
             exceptions.handle(request,
-                              _("Unable to create node: %s") % e,
+                              _("Unable to create node."),
                               redirect=redirect)
 
 
@@ -132,9 +132,9 @@ class UpdateNodeForm(forms.SelfHandlingForm):
                   ' has been accepted for processing.') %
                 data['name'])
             return node
-        except Exception as e:
+        except Exception:
             redirect = reverse("horizon:cluster:nodes:index")
             exceptions.handle(request,
-                              _("Unable to update node: %s") % e,
+                              _("Unable to update node."),
                               redirect=redirect)
             return False
diff --git a/senlin_dashboard/cluster/nodes/views.py b/senlin_dashboard/cluster/nodes/views.py
index 4a65b073..990d1d7f 100644
--- a/senlin_dashboard/cluster/nodes/views.py
+++ b/senlin_dashboard/cluster/nodes/views.py
@@ -57,10 +57,10 @@ class IndexView(tables.DataTableView):
                 paginate=True,
                 reversed_order=reversed_order,
                 filters=filters)
-        except Exception as e:
+        except Exception:
             self._prev = self._more = False
             nodes = []
-            msg = _('Unable to retrieve nodes: %s') % e
+            msg = _('Unable to retrieve nodes.')
             exceptions.handle(self.request, msg)
         return nodes
 
@@ -90,8 +90,8 @@ class DetailView(tabs.TabView):
             # Get initial node information
             node_id = self.kwargs["node_id"]
             node = senlin.node_get(self.request, node_id)
-        except Exception as e:
-            msg = _("Unable to retrieve node: %s") % e
+        except Exception:
+            msg = _("Unable to retrieve node.")
             url = reverse_lazy("horizon:cluster:nodes:index")
             exceptions.handle(self.request, msg, redirect=url)
         return node
@@ -145,8 +145,8 @@ class UpdateView(forms.ModalFormView):
                          "role": node.role,
                          "metadata": metadata}
 
-        except Exception as e:
-            msg = _("Unable to retrieve node: %s") % e
+        except Exception:
+            msg = _("Unable to retrieve node.")
             url = reverse_lazy("horizon:cluster:nodes:index")
             exceptions.handle(self.request, msg, redirect=url)
         return node_dict
diff --git a/senlin_dashboard/cluster/policies/forms.py b/senlin_dashboard/cluster/policies/forms.py
index 09a4a8d6..731c3c43 100644
--- a/senlin_dashboard/cluster/policies/forms.py
+++ b/senlin_dashboard/cluster/policies/forms.py
@@ -90,9 +90,9 @@ class CreatePolicyForm(forms.SelfHandlingForm):
                              _('Your policy %s has been created.') %
                              args['name'])
             return policy
-        except Exception as e:
+        except Exception:
             redirect = reverse(INDEX_URL)
-            msg = _('Unable to create new policy: %s') % e
+            msg = _('Unable to create new policy.')
             exceptions.handle(request, msg, redirect=redirect)
             return False
 
@@ -113,8 +113,8 @@ class UpdatePolicyForm(forms.SelfHandlingForm):
         except ValidationError as e:
             self.api_error(e.messages[0])
             return False
-        except Exception as e:
+        except Exception:
             redirect = reverse(INDEX_URL)
-            msg = _('Unable to update policy: %s') % e
+            msg = _('Unable to update policy.')
             exceptions.handle(request, msg, redirect=redirect)
             return False
diff --git a/senlin_dashboard/cluster/policies/views.py b/senlin_dashboard/cluster/policies/views.py
index c8c6f6a2..01c31652 100644
--- a/senlin_dashboard/cluster/policies/views.py
+++ b/senlin_dashboard/cluster/policies/views.py
@@ -57,10 +57,10 @@ class IndexView(tables.DataTableView):
                 paginate=True,
                 reversed_order=reversed_order,
                 filters=filters)
-        except Exception as e:
+        except Exception:
             self._prev = self._more = False
             policies = []
-            msg = _('Unable to retrieve policies: %s') % e
+            msg = _('Unable to retrieve policies.')
             exceptions.handle(self.request, msg)
         return policies
 
@@ -90,8 +90,8 @@ class DetailView(tabs.TabView):
             policy = senlin.policy_get(self.request, policy_id)
             policy.policy_spec = yaml.safe_dump(policy.spec,
                                                 default_flow_style=False)
-        except Exception as e:
-            msg = _("Unable to retrieve policy: %s") % e
+        except Exception:
+            msg = _("Unable to retrieve policy.")
             url = reverse_lazy(policies_forms.INDEX_URL)
             exceptions.handle(self.request, msg, redirect=url)
         return policy
@@ -129,8 +129,8 @@ class UpdateView(forms.ModalFormView):
             policy = senlin.policy_get(self.request, policy_id)
             policy_dict = {"policy_id": policy_id,
                            "name": policy.name}
-        except Exception as e:
-            msg = _("Unable to retrieve policy: %s") % e
+        except Exception:
+            msg = _("Unable to retrieve policy.")
             url = reverse_lazy(policies_forms.INDEX_URL)
             exceptions.handle(self.request, msg, redirect=url)
         return policy_dict
diff --git a/senlin_dashboard/cluster/receivers/forms.py b/senlin_dashboard/cluster/receivers/forms.py
index a3ce1f05..bdbdf8b5 100644
--- a/senlin_dashboard/cluster/receivers/forms.py
+++ b/senlin_dashboard/cluster/receivers/forms.py
@@ -95,8 +95,8 @@ class CreateReceiverForm(forms.SelfHandlingForm):
                 _('Your receiver %s has been created successfully.') %
                 data['name'])
             return receiver
-        except Exception as e:
+        except Exception:
             redirect = reverse(INDEX_URL)
-            msg = _('Unable to create new receiver: %s') % e
+            msg = _('Unable to create new receiver.')
             exceptions.handle(request, msg, redirect=redirect)
             return False
diff --git a/senlin_dashboard/cluster/receivers/views.py b/senlin_dashboard/cluster/receivers/views.py
index 54344fcc..5b606e25 100644
--- a/senlin_dashboard/cluster/receivers/views.py
+++ b/senlin_dashboard/cluster/receivers/views.py
@@ -55,10 +55,10 @@ class IndexView(tables.DataTableView):
                 paginate=True,
                 reversed_order=reversed_order,
                 filters=filters)
-        except Exception as e:
+        except Exception:
             self._prev = self._more = False
             receivers = []
-            msg = _('Unable to retrieve receivers: %s') % e
+            msg = _('Unable to retrieve receivers.')
             exceptions.handle(self.request, msg)
         return receivers
 
@@ -87,8 +87,8 @@ class DetailView(tabs.TabView):
             # Get initial receiver information
             receiver_id = self.kwargs["receiver_id"]
             receiver = senlin.receiver_get(self.request, receiver_id)
-        except Exception as e:
-            msg = _("Unable to retrieve receiver: %s") % e
+        except Exception:
+            msg = _("Unable to retrieve receiver.")
             url = reverse_lazy("horizon:cluster:receivers:index")
             exceptions.handle(self.request, msg, redirect=url)
         return receiver