private List<TxnToWriteId> allocateWriteIdsImpl(final List<Long> txnIds) throws TException {
    return conn.getMSC().allocateTableWriteIdsBatch(txnIds, conn.getDatabase(),
        conn.getTable().getTableName());
  }
Represents a batch of transactions acquired from MetaStore.

@param conn - hive streaming connection
@throws StreamingException if failed to create new RecordUpdater for batch
streaming/src/java/org/apache/hive/streaming/TransactionBatch.java