segment.expand();
      }
      assertEquals(i, segment.table.length());
      assertEquals(liveCount, countLiveEntries(map, 0));
      // expansion cleanup is sloppy, with a goal of avoiding unnecessary copies
      assertTrue(segment.count >= liveCount);
      assertTrue(segment.count <= originalCount);
      assertEquals(originalMap, ImmutableMap.copyOf(map));
    }
  }

        } catch (final Exception e) {
            logger.debug("Failed to check {} index status.", indexName, e);
        }
        return exists;
    }

    /**
     * Copies documents from one index to another with optional transformation.
     *
     * @param fromIndex        the source index name
     * @param toIndex          the destination index name