@Override
  public void rmRegion(LocalRegion r) {
    TXRegionState txr = regions.remove(r);
    if (txr != null) {
      txr.cleanup(r);
    }
  }
keeps track of TransactionDataRebalancedException during txPutEntry
geode-core/src/main/java/org/apache/geode/internal/cache/TXState.java