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https://issues.apache.org/jira/browse/HIVE-19202?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhuwei updated HIVE-19202:
--------------------------
    Component/s: CBO

> CBO failed due to NullPointerException in HiveAggregate.isBucketedInput()
> -------------------------------------------------------------------------
>
>                 Key: HIVE-19202
>                 URL: https://issues.apache.org/jira/browse/HIVE-19202
>             Project: Hive
>          Issue Type: Bug
>          Components: CBO
>    Affects Versions: 2.1.1
>            Reporter: zhuwei
>            Assignee: zhuwei
>            Priority: Critical
>             Fix For: 2.1.1
>
>         Attachments: HIVE-19202.1.patch
>
>
> I ran a query with join and group by with below settings, COB failed due to 
> NullPointerException in HiveAggregate.isBucketedInput()
> set hive.execution.engine=tez;
> set hive.cbo.costmodel.extended=true;
>  
> In class HiveRelMdDistribution, we implemented below functions:
> public RelDistribution distribution(HiveAggregate aggregate, RelMetadataQuery 
> mq)
> public RelDistribution distribution(HiveJoin join, RelMetadataQuery mq)
>  
> But in HiveAggregate.isBucketedInput, the argument passed to distribution is 
> "this.getInput()"
> , obviously it's not right here. The right argument needed is "this"



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