diff --git a/nailgun/api/handlers.py b/nailgun/api/handlers.py
index c5c5ffb87..710fe82ae 100644
--- a/nailgun/api/handlers.py
+++ b/nailgun/api/handlers.py
@@ -260,7 +260,7 @@ class ClusterChangesHandler(JSONHandler):
         allowed_statuses = ("discover", "ready")
         for node in cluster.nodes:
             if node.status not in allowed_statuses:
-                raise Exception(
+                raise web.badrequest(
                     "Node %s (%s) status:%s not in %s" % (
                         node.mac,
                         node.ip,
diff --git a/nailgun/wsgi.py b/nailgun/wsgi.py
index a38ef93b7..bf0e733b0 100644
--- a/nailgun/wsgi.py
+++ b/nailgun/wsgi.py
@@ -1,11 +1,14 @@
 import os
 import sys
+import logging
 
 import web
 
 curdir = os.path.dirname(__file__)
 sys.path.insert(0, curdir)
 
+logging.basicConfig(stream=sys.stderr, level=logging.DEBUG)
+
 from api.handlers import check_client_content_type
 from db import load_db_driver
 from urls import urls