private void cleanupTransaction(TXStateProxy tx) {
    if (txUniqId != TXManagerImpl.NOTX) {
      InternalCache cache = GemFireCacheImpl.getInstance();
      if (cache == null) {
        // ignore and return, we are shutting down!
        return;
      }
      TXManagerImpl mgr = cache.getTXMgr();
      mgr.unmasquerade(tx);
    }
  }
default exception to ensure a false-positive response is never returned
geode-core/src/main/java/org/apache/geode/internal/cache/DistributedRegionFunctionStreamingMessage.java