query with FIST_VALUE/LAST_VALUE functions keep running forever

[Dima Fadeyev <df...@pragsis.com>]

Hello everyone,

I'm trying to run a query on an 8 node cluster with hive-0.13 (MapR 3.1.1):

SELECT FIRST_VALUE(col_a) OVER (PARTITION BY col_b ORDER BY col_c) FROM 
test;

If any partition is over 30000 rows, the reduce phase of my query keeps 
running forever (until job is being killed by JobTracker).

Is this normal behavior? A normal ORDER BY on a table of 7 millions of 
rows takes about 70 seconds to complete on the same cluster.

Thanks and best regards,
-- 

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