@Override
    public synchronized boolean testAndSetUnrecovered() {
      boolean result = !unrecovered;
      if (result) {
        unrecovered = true;
        dr = null;
      }
      return result;
    }
Callback to indicate that this oplog has created a krf.
geode-core/src/main/java/org/apache/geode/internal/cache/Oplog.java