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https://issues.apache.org/jira/browse/HIVE-13021?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15155372#comment-15155372
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Gopal V commented on HIVE-13021:
--------------------------------
I investigated both failures on CliDriver and came up with nothing.
Thanks for point out the 2nd failure, I think compute_stats is broken in
StatsOptimizer when Tez is enabled.
{code}
java.lang.NullPointerException
at
org.apache.hadoop.hive.ql.udf.generic.GenericUDAFComputeStats$GenericUDAFNumericStatsEvaluator$NumericStatsAgg.estimate(GenericUDAFComputeStats.java:434)
at
org.apache.hadoop.hive.ql.udf.generic.GenericUDAFComputeStats$GenericUDAFDoubleStatsEvaluator$DoubleStatsAgg.estimate(GenericUDAFComputeStats.java:643)
at
org.apache.hadoop.hive.ql.optimizer.stats.annotation.StatsRulesProcFactory$GroupByStatsRule.checkMapSideAggregation(StatsRulesProcFactory.java:996)
at
org.apache.hadoop.hive.ql.optimizer.stats.annotation.StatsRulesProcFactory$GroupByStatsRule.process(StatsRulesProcFactory.java:726)
at
org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:90)
{code}
> GenericUDAFEvaluator.isEstimable(agg) always returns false
> ----------------------------------------------------------
>
> Key: HIVE-13021
> URL: https://issues.apache.org/jira/browse/HIVE-13021
> Project: Hive
> Issue Type: Bug
> Components: UDF
> Affects Versions: 1.2.1
> Reporter: Sergey Zadoroshnyak
> Assignee: Gopal V
> Priority: Critical
> Labels: Performance
> Fix For: 1.3.0, 2.1.0
>
> Attachments: HIVE-13021.1.patch
>
>
> GenericUDAFEvaluator.isEstimable(agg) always returns false, because
> annotation AggregationType has default RetentionPolicy.CLASS and cannot be
> retained by the VM at run time.
> As result estimate method will never be executed.
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