public long getHashCode(BytesWritable currentKey) throws HiveException, IOException {
    return INSTANCE.getHashCode(currentKey);
  }
HashTableLoader for Tez constructs the hashtable from records read from
a broadcast edge.
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/mapjoin/fast/VectorMapJoinFastTableContainer.java