lib/rails_failover/redis/handler.rb in rails_failover-0.5.5 vs lib/rails_failover/redis/handler.rb in rails_failover-0.5.6

@@ -61,10 +61,10 @@
         frequency = RailsFailover::Redis.verify_primary_frequency_seconds
         sleep(frequency * ((rand(VERIFY_FREQUENCY_BUFFER_PRECENT) + 100) / 100.0))
 
         active_primaries_keys = {}
 
-        primaries_down.each do |key, options|
+        mon_synchronize { primaries_down.dup }.each do |key, options|
           info = nil
           options = options.dup
 
           begin
             options[:driver] = options[:original_driver]