private void testMemberRemoveAckInteraction(final boolean delete) {
    createGroup(groupSize);
    Transaction txn;
    Database db;
    try {
      MasterTxn.setFactory(new TxnFactory(delete));
      ReplicatedEnvironment master = repEnvInfo[0].getEnv();

      txn = master.beginTransaction(null, null);
      /* Write to the environment. */
      db = master.openDatabase(txn, "random", dbconfig);
      db.close();
      txn.commit();
    } catch (InsufficientAcksException e) {
      fail("No exception expected.");
    } finally {
      MasterTxn.setFactory(null);
    }
  }