CKAN: reload the service immediately after the switch to memcache backed sessions.

ckan/ckan/tasks/ckan-memcache.yml

@@ -15,13 +15,17 @@
   - name: Configure CKAN so that it uses memcache for its sessions
     ini_file: dest={{ ckan_config_file }} section={{ item.section }} option={{ item.option }} value={{ item.value }} state={{ item.state }}
     with_items: '{{ ckan_memcache_ini_opts }}'
-    notify:
-      - Restart CKAN
-      - Restart fetch and gather consumers
+    notify: Restart fetch and gather consumers
+    register: ckan_use_memcache
     tags: [ 'ckan', 'ckan_ini', 'ckan_plugins', 'ckan_sessions', 'ckan_memcache' ]
 
+  - name: Restart CKAN after enabling the memcache sessions configuration
+    service: name=apache2 state=reloaded
+    when: ckan_use_memcache is changed
+
   - name: Remove the CKAN session files
     file: dest=/tmp/{{ ckan_site_id }}/sessions state=absent
+    ignore_errors: True
 
   become: False
   when: ckan_memcache_sessions is defined and ckan_memcache_sessions