Your problem solution is here. Go to the githubLink, there is lot of udfs are created by klout. Download, crate the JAR and add the JAR in the hive. Example

 CREATE TEMPORARY FUNCTION combine AS 'brickhouse.udf.collect.CombineUDF';
 CREATE TEMPORARY FUNCTION combine_unique AS 'brickhouse.udf.collect.CombineUniqueUDAF';

select combine_unique(combine(array('a','b','c'), array('b','c','d'))) from reqtable;

OK
["d","b","c","a"]