Commits on Jul 22, 2012

1. Make the ring manager responsible for loading the ring …

   Change riak_core_ring_manager and riak_core_app so that the ring manager
   is responsible for loading the ring file from the disk rather than starting
   with an initially empty ring and then relying upon the riak_core app to
   later load the ring. This avoids a race condition with the ring manager
   writing the empty ring to the disk before the riak_core app loads the
   prior ring.
   
   Note: Riak previously relied upon starting with a fresh ring in order to
   ensure secondary vnodes were started in case any had fallback data that
   needed to be handed off. The act of starting secondaries has long since
   been moved to the riak_core_vnode_manager that periodically starts up
   secondary vnodes over time, therefore there is no longer any need to
   start with a fresh ring. This commit will therefore always load a saved
   ring when the ring_manager starts, rather than starting with a fresh ring.

   

   jtuple committed Jul 22, 2012
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