Hive queries hangs with first stage job created with zero mappers and 1
reducer,
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Key: HIVE-2195
URL: https://issues.apache.org/jira/browse/HIVE-2195
Project: Hive
Issue Type: Bug
Affects Versions: 0.7.0
Reporter: vitthal (Suhas) Gogate
This happens when query aggregate data w/ predicate selecting bunch of
non-existing data partitions.
e,g, Table XXX has five columns, A (int), B (int), C(string), date (int) and
hour (int), where date/hour are the partition columns,
select cast((100*date+hour) as BIGINT) as datehour, sum(A) as sumA,
sum(B) as sumB from XXX where date>=20110925 and C='test' group by date, hour
order by datehour
In the above query, make a note that selected date partition range does not
exists in hive table i.e. no date partitions for date>=20110925
The above query hangs with the first map reduce job it creates, with zero
mappers and 1 reducer.
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