*** cache.rb	2011-11-28 11:39:48.861984055 +0100
--- /usr/local/lib/ruby/gems/1.9.1/gems/odba-1.0.0/lib/odba/cache.rb	2011-11-28 11:40:18.640798211 +0100
***************
*** 95,106 ****
        end
        counter = 0
        cutoff = offset + @cleaner_step
!       holder.each_value { |value|
!         counter += 1
!         if(counter > offset && value.odba_old?(retire_time))
!           value.odba_retire && @cleaned += 1
!         end
!         return cutoff if(counter > cutoff)
        }
        cutoff 
      # every once in a while we'll get a 'hash modified during iteration'-Error.
--- 95,108 ----
        end
        counter = 0
        cutoff = offset + @cleaner_step
!       @cache_mutex.synchronize {
!         holder.each_value { |value|
!           counter += 1
!           if(counter > offset && value.odba_old?(retire_time))
!             value.odba_retire && @cleaned += 1
!           end
!           return cutoff if(counter > cutoff)
!         }
        }
        cutoff 
      # every once in a while we'll get a 'hash modified during iteration'-Error.