[jira] [Created] (HIVE-10321) Execution error for Parquet table and GROUP BY involving VARCHAR data type

["Ryan Pridgeon (JIRA)" <ji...@apache.org>]

Ryan Pridgeon created HIVE-10321:
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             Summary: Execution error for Parquet table and GROUP BY involving VARCHAR data type
                 Key: HIVE-10321
                 URL: https://issues.apache.org/jira/browse/HIVE-10321
             Project: Hive
          Issue Type: Bug
          Components: Hive
            Reporter: Ryan Pridgeon


When executing a SELECT Distinct on a field of type VARCHAR hive fails with the following error:

FATAL [main] org.apache.hadoop.hive.ql.exec.mr.ExecMapper: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row {"hp_process_date":null,"dw_sequence_nbr":null,"de2_card_nbr":"ACTUAL VALUE MASKED BY JAA","pds1_paypass_acct_nbr":null,"dw_process_date":"2014-01-10"}
at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:549)
at org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:177)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:450)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1642)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:163)
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ClassCastException: org.apache.hadoop.io.Text cannot be cast to org.apache.hadoop.hive.serde2.io.HiveVarcharWritable
at org.apache.hadoop.hive.ql.exec.GroupByOperator.processOp(GroupByOperator.java:808)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:796)
at org.apache.hadoop.hive.ql.exec.SelectOperator.processOp(SelectOperator.java:87)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:796)
at org.apache.hadoop.hive.ql.exec.TableScanOperator.processOp(TableScanOperator.java:92)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:796)
at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:539)
... 9 more
Caused by: java.lang.ClassCastException: org.apache.hadoop.io.Text cannot be cast to org.apache.hadoop.hive.serde2.io.HiveVarcharWritable
at org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableHiveVarcharObjectInspector.copyObject(WritableHiveVarcharObjectInspector.java:109)
at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils.copyToStandardObject(ObjectInspectorUtils.java:309)
at org.apache.hadoop.hive.ql.exec.KeyWrapperFactory$ListKeyWrapper.deepCopyElements(KeyWrapperFactory.java:150)
at org.apache.hadoop.hive.ql.exec.KeyWrapperFactory$ListKeyWrapper.deepCopyElements(KeyWrapperFactory.java:142)
at org.apache.hadoop.hive.ql.exec.KeyWrapperFactory$ListKeyWrapper.copyKey(KeyWrapperFactory.java:119)
at org.apache.hadoop.hive.ql.exec.GroupByOperator.processHashAggr(GroupByOperator.java:821)
at org.apache.hadoop.hive.ql.exec.GroupByOperator.processKey(GroupByOperator.java:735)
at org.apache.hadoop.hive.ql.exec.GroupByOperator.processOp(GroupByOperator.java:803)

I understand that Varchar support with parquet was introduced in Hive 0.14: 

https://cwiki.apache.org/confluence/display/Hive/Parquet

This issue seems similar to:
https://issues.apache.org/jira/browse/HIVE-9371

Which was closed as a duplicate. Which I believe was marked as such do to 
https://issues.apache.org/jira/browse/HIVE-7735

Even with this fix however I am experiencing the issue. 

Thank you, 
Ryan



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