void recoverRegionId(long drId) {
    long newVal = drId + 1;
    if (regionIdCtr.get() < newVal) { // fixes bug 41421
      regionIdCtr.set(newVal);
    }
  }
Called when we are doing recovery and we find a new id.
geode-core/src/main/java/org/apache/geode/internal/cache/DiskStoreImpl.java