Update uwsgi.ini file:

- use master process
- comment lazy-apps

etc/uwsgi.ini

@@ -1,20 +1,36 @@
 [uwsgi]
 http-socket = 0.0.0.0:5000
+
 # Uncomment if you installed from distribution packaging
 # plugin = python
 # Uncomment if you installed from distribution packaging
 # plugin = logfile
+
+# Python module
 module = alignak_backend.app:app
+
 enable-threads = true
 processes = 4
+
+# Each detached worker loads its own app instance
+lazy-apps = true
+
+# Log activity in those files
 req-logger = file:/usr/local/var/log/alignak-backend-access.log
 logger = file:/usr/local/var/log/alignak-backend-error.log
+
+# Report memory activity to the stats
 memory-report = true
-# uid = root
-# guid = root
+
+# Define specific uid/gid if uWSGI started as root
+# uid = alignak
+# guid = alignak
+
+# Default buffer size for HTTP header is very low (4096)
 buffer-size = 32768
 
-# uWSGI master process pid
+# uWSGI master process: use a master process and store its pid
+master = true
 pidfile = /tmp/alignak-backend.pid
 
 # ---