protected List<RecordUpdater> initializeBuckets() {
    List<RecordUpdater> result = new ArrayList<>(totalBuckets);
    for (int bucket = 0; bucket < totalBuckets; bucket++) {
      result.add(bucket, null); //so that get(i) returns null rather than ArrayOutOfBounds
    }
    return result;
  }
Returns the file that would be used to store rows under this.
parameters
@param partitionValues partition values
@param bucketId bucket id
@param minWriteId min write Id
@param maxWriteId max write Id
@param statementId statement Id
@param table table
@return the location of the file.
@throws StreamingException when the path is not found
streaming/src/java/org/apache/hive/streaming/AbstractRecordWriter.java