Are you using Java 1.5? Hive now requires Java 1.6
On Tue, Apr 6, 2010 at 7:23 AM, Aaron McCurry <[email protected]> wrote: > In the past I have used hive 0.3.0 successfully and now with a new project > coming up I decided to give hive 0.5.0 a run and everything is working as > expected, except for when I try to get a simple count of the table. > > The simple table is defined as: > > create table log_table (col1 string, col2 string, col3 string, col4 string, > col5 string, col6 string) > row format delimited > fields terminated by '\t' > stored as textfile; > > And the query I'm running is: > > select count(1) from log_table; > > From the hive command line I get the following errors: > > ... > In order to set c constant number of reducers: > set mapred.reduce.tasks=<number> > Exception during encoding:java.lang.Exception: failed to write expression: > GenericUDAFEvaluator$Mode=Class.new(); > Continue... > Exception during encoding:java.lang.Exception: failed to write expression: > GenericUDAFEvaluator$Mode=Class.new(); > Continue... > Exception during encoding:java.lang.Exception: failed to write expression: > GenericUDAFEvaluator$Mode=Class.new(); > Continue... > Exception during encoding:java.lang.Exception: failed to write expression: > GenericUDAFEvaluator$Mode=Class.new(); > Continue... > Starting Job = job_201004010912_0015, Tracking URL = ..... > > > > And when looking at the failed hadoop jobs I see the following exception: > > Caused by: java.lang.ClassCastException: > org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableIntObjectInspector > incompatible with > org.apache.hadoop.hive.serde2.objectinspector.primitive.LongObjectInspector > at > org.apache.hadoop.hive.ql.udf.generic.GenericUDAFCount$GenericUDAFCountEvaluator.merge(GenericUDAFCount.java:93) > at > org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.aggregate(GenericUDAFEvaluator.java:113) > ... > > > Is this a known issue? Am I missing something? Any guidance would be > appreciated. Thanks! > > Aaron > -- Yours, Zheng http://www.linkedin.com/in/zshao
