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https://issues.apache.org/jira/browse/HIVE-12370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14998540#comment-14998540
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Yi Zhou commented on HIVE-12370:
--------------------------------
Oh..Thank you [~leftylev] correct me..
Hi [~xuefuz],
In our case, it got failure with larger data set..but small data set is OK.
Could you please help to identify this Hive issue ?
> Hive Query got failure with larger scale data set with enablng sampling order
> optimization
> ------------------------------------------------------------------------------------------
>
> Key: HIVE-12370
> URL: https://issues.apache.org/jira/browse/HIVE-12370
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 1.1.0
> Reporter: Yi Zhou
>
> Found that hive would get failure on Hive on MR with larger scale
> data(e.g.,3TB/10TB) when enabling sampling optimization(it got passed with
> 1GB data set).
> hive.optimize.sampling.orderby=true
> hive.optimize.sampling.orderby.number=20000
> hive.optimize.sampling.orderby.percent=0.1
> Error: java.lang.RuntimeException:
> org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while
> processing row
> at
> org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:179)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54)
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:453)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:343)
> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
> Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime
> Error while processing row
> at
> org.apache.hadoop.hive.ql.exec.vector.VectorMapOperator.process(VectorMapOperator.java:52)
> at
> org.apache.hadoop.hive.ql.exec.mr.ExecMapper.map(ExecMapper.java:170)
> ... 8 more
> Caused by: java.lang.ClassCastException:
> org.apache.hadoop.hive.ql.io.orc.OrcStruct cannot be cast to
> org.apache.hadoop.hive.ql.exec.vector.VectorizedRowBatch
> at
> org.apache.hadoop.hive.ql.exec.vector.VectorSelectOperator.processOp(VectorSelectOperator.java:121)
> at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:815)
> at
> org.apache.hadoop.hive.ql.exec.TableScanOperator.processOp(TableScanOperator.java:95)
> at
> org.apache.hadoop.hive.ql.exec.MapOperator$MapOpCtx.forward(MapOperator.java:157)
> at
> org.apache.hadoop.hive.ql.exec.vector.VectorMapOperator.process(VectorMapOperator.java:45)
> ... 9 more
> FAILED: Execution Error, return code 2 from
> org.apache.hadoop.hive.ql.exec.mr.MapRedTask
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