while ((e = recencyQueue.poll()) != null) {
        // An entry may be in the recency queue despite it being removed from
        // the map . This can occur when the entry was concurrently read while a
        // writer is removing it from the segment or after a clear has removed
        // all the segment's entries.
        if (accessQueue.contains(e)) {
          accessQueue.add(e);
        }
      }
    }

      while ((e = recencyQueue.poll()) != null) {
        // An entry may be in the recency queue despite it being removed from
        // the map . This can occur when the entry was concurrently read while a
        // writer is removing it from the segment or after a clear has removed
        // all the segment's entries.
        if (accessQueue.contains(e)) {
          accessQueue.add(e);
        }
      }
    }