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https://issues.apache.org/jira/browse/HIVE-5279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13770007#comment-13770007
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Edward Capriolo commented on HIVE-5279:
---------------------------------------
I just solved a similar issue here:
https://issues.apache.org/jira/browse/HIVE-5294
We are probably best off turning things that need to be serialized into
JavaBean like classe no-arg constructor setters + getters. I know that is not
always the most elegant way, but at least it would be consistent, when you dive
around the code best you usually get tripped up by some weird construct with a
static initializer, or something.
> Kryo cannot instantiate GenericUDAFEvaluator in GroupByDesc
> -----------------------------------------------------------
>
> Key: HIVE-5279
> URL: https://issues.apache.org/jira/browse/HIVE-5279
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Priority: Critical
> Attachments: 5279.patch, D12963.1.patch, D12963.2.patch,
> D12963.3.patch
>
>
> We didn't forced GenericUDAFEvaluator to be Serializable. I don't know how
> previous serialization mechanism solved this but, kryo complaints that it's
> not Serializable and fails the query.
> The log below is the example,
> {noformat}
> java.lang.RuntimeException: com.esotericsoftware.kryo.KryoException: Class
> cannot be created (missing no-arg constructor):
> org.apache.hadoop.hive.serde2.objectinspector.StandardListObjectInspector
> Serialization trace:
> inputOI
> (org.apache.hadoop.hive.ql.udf.generic.GenericUDAFGroupOn$VersionedFloatGroupOnEval)
> genericUDAFEvaluator (org.apache.hadoop.hive.ql.plan.AggregationDesc)
> aggregators (org.apache.hadoop.hive.ql.plan.GroupByDesc)
> conf (org.apache.hadoop.hive.ql.exec.GroupByOperator)
> childOperators (org.apache.hadoop.hive.ql.exec.SelectOperator)
> childOperators (org.apache.hadoop.hive.ql.exec.TableScanOperator)
> aliasToWork (org.apache.hadoop.hive.ql.plan.MapWork)
> at
> org.apache.hadoop.hive.ql.exec.Utilities.getBaseWork(Utilities.java:312)
> at
> org.apache.hadoop.hive.ql.exec.Utilities.getMapWork(Utilities.java:261)
> at
> org.apache.hadoop.hive.ql.io.HiveInputFormat.init(HiveInputFormat.java:256)
> at
> org.apache.hadoop.hive.ql.io.HiveInputFormat.pushProjectionsAndFilters(HiveInputFormat.java:383)
> at org.apache.h
> {noformat}
> If this cannot be fixed in somehow, some UDAFs should be modified to be run
> on hive-0.13.0
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