@Override
  public void setConf(Configuration configuration) {
    conf = configuration;
    txnHandler = TxnUtils.getTxnStore(conf);
    initTasks();
  }
Performs background tasks for Transaction management in Hive.
Runs inside Hive Metastore Service.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/txn/service/AcidHouseKeeperService.java