@Override
 public void preCompactSelection(
     ObserverContext<RegionCoprocessorEnvironment> c, Store store, List<StoreFile> candidates)
     throws IOException {
   if (LOG.isDebugEnabled())
     SpliceLogUtils.debug(LOG, "BackupEndpointObserver.preCompactSelection()");
   BackupUtils.waitForBackupToComplete(tableName, regionName, path);
   super.preCompactSelection(c, store, candidates);
 }