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Posted to issues@hive.apache.org by "Mostafa Mokhtar (JIRA)" <ji...@apache.org> on 2015/06/14 01:21:01 UTC

[jira] [Updated] (HIVE-10704) Errors in Tez HashTableLoader when estimated table size is 0

     [ https://issues.apache.org/jira/browse/HIVE-10704?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mostafa Mokhtar updated HIVE-10704:
-----------------------------------
    Assignee: Jason Dere  (was: Mostafa Mokhtar)

> Errors in Tez HashTableLoader when estimated table size is 0
> ------------------------------------------------------------
>
>                 Key: HIVE-10704
>                 URL: https://issues.apache.org/jira/browse/HIVE-10704
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Jason Dere
>            Assignee: Jason Dere
>             Fix For: 1.2.1
>
>         Attachments: HIVE-10704.1.patch, HIVE-10704.2.patch, HIVE-10704.3.patch
>
>
> Couple of issues:
> - If the table sizes in MapJoinOperator.getParentDataSizes() are 0 for all tables, the largest small table selection is wrong and could select the large table (which results in NPE)
> - The memory estimates can either divide-by-zero, or allocate 0 memory if the table size is 0. Try to come up with a sensible default for this.



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