added info to ugprade docs to restart celery

docs/upgrade.rst

@@ -1,55 +1,58 b''
 .. _upgrade:
 
 =======
 Upgrade
 =======
 
 Upgrading from Cheese Shop
 --------------------------
 
 .. note::
    Firstly, it is recommended that you **always** perform a database backup 
    before doing an upgrade.
 
 The easiest way to upgrade ``rhodecode`` is to run::
 
  easy_install -U rhodecode
 
 Or::
 
  pip install --upgrade rhodecode
 
 
 Then make sure you run the following command from the installation directory::
  
  paster make-config RhodeCode production.ini
  
 This will display any changes made by the new version of RhodeCode to your
 current configuration. It will try to perform an automerge. It's always better
 to make a backup of your configuration file before hand and re check the 
 content after the automerge.
 
 .. note::
    Please always make sure your .ini files are up to date. Often errors are
    caused by missing params added in new versions.
 
 
 It is also recommended that you rebuild the whoosh index after upgrading since 
 the new whoosh version could introduce some incompatible index changes. Please
 Read the changelog to see if there were any changes to whoosh.
 
 
 The final step is to upgrade the database. To do this simply run::
 
     paster upgrade-db production.ini
  
 This will upgrade the schema and update some of the defaults in the database,
 and will always recheck the settings of the application, if there are no new 
 options that need to be set.
 
+.. note::
+   If you're using Celery, make sure you restart all instances of it after
+   upgrade.
 
 .. _virtualenv: http://pypi.python.org/pypi/virtualenv  
 .. _python: http://www.python.org/
 .. _mercurial: http://mercurial.selenic.com/
 .. _celery: http://celeryproject.org/
 .. _rabbitmq: http://www.rabbitmq.com/
  No newline at end of file