# File lib/active_record/connection_adapters/abstract/connection_specification.rb, line 91
      def clear_reloadable_connections!
        if @@allow_concurrency
          # With concurrent connections @@active_connections is
          # a hash keyed by thread id.
          @@active_connections.each do |thread_id, conns|
            conns.each do |name, conn|
              if conn.requires_reloading?
                conn.disconnect!
                @@active_connections[thread_id].delete(name)
              end
            end
          end
        else
          @@active_connections.each do |name, conn|
            if conn.requires_reloading?
              conn.disconnect!
              @@active_connections.delete(name)
            end
          end
        end
      end