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https://issues.apache.org/jira/browse/HIVE-22633?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17101300#comment-17101300
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Renukaprasad C commented on HIVE-22633:
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[~zhangbutao] are you working on this issue?
> GroupByOperator may throw NullPointerException when setting data skew
> optimization parameters
> ---------------------------------------------------------------------------------------------
>
> Key: HIVE-22633
> URL: https://issues.apache.org/jira/browse/HIVE-22633
> Project: Hive
> Issue Type: Bug
> Affects Versions: 3.1.0, 4.0.0, 3.1.1
> Reporter: zhangbutao
> Priority: Major
>
> if hive.map.aggr and hive.groupby.skewindata set true，exception will be
> thrown.
> step to repro:
> 1. create table:
> set hive.map.aggr=true;
> set hive.groupby.skewindata=true;
> create table test1 (id1 bigint);
> create table test2 (id2 bigint) partitioned by(dt2 string);
> insert into test2 partition(dt2='2020') select a.id1 from test1 a group by
> a.id1;
> 2.NullPointerException:
> {code:java}
> ], TaskAttempt 2 failed, info=[Error: Error while running task ( failure ) :
> attempt_1585641455670_0001_2_03_000000_2:java.lang.RuntimeException:
> java.lang.NullPointerException
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:296)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.run(TezProcessor.java:250)
> at
> org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:374)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:73)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable$1.run(TaskRunner2Callable.java:61)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1682)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:61)
> at
> org.apache.tez.runtime.task.TaskRunner2Callable.callInternal(TaskRunner2Callable.java:37)
> at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
> at
> com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:108)
> at
> com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:41)
> at
> com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:77)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hive.ql.udf.generic.GenericUDAFComputeStats$GenericUDAFNumericStatsEvaluator.init(GenericUDAFComputeStats.java:373)
> at
> org.apache.hadoop.hive.ql.exec.GroupByOperator.initializeOp(GroupByOperator.java:373)
> at
> org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:360)
> at
> org.apache.hadoop.hive.ql.exec.tez.ReduceRecordProcessor.init(ReduceRecordProcessor.java:191)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:266)
> {code}
>
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