artemis-commons/src/main/java/org/apache/activemq/artemis/utils/collections/ConcurrentLongHashSet.java [99:110]:
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   public boolean isEmpty() {
      for (Section s : sections) {
         //read-acquire s.size that was write-released by s.unlockWrite
         s.tryOptimisticRead();
         //a stale value won't hurt: anyway it's subject to concurrent modifications
         if (s.size != 0) {
            return false;
         }
      }

      return true;
   }
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artemis-commons/src/main/java/org/apache/activemq/artemis/utils/collections/ConcurrentLongHashMap.java [103:114]:
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   public boolean isEmpty() {
      for (Section<V> s : sections) {
         //read-acquire s.size that was write-released by s.unlockWrite
         s.tryOptimisticRead();
         //a stale value won't hurt: anyway it's subject to concurrent modifications
         if (s.size != 0) {
            return false;
         }
      }

      return true;
   }
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