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From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-16546) LLAP: Fail map join tasks if hash table memory exceeds threshold
Date Tue, 02 May 2017 08:23:04 GMT

     [ https://issues.apache.org/jira/browse/HIVE-16546?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Prasanth Jayachandran updated HIVE-16546:
-----------------------------------------
    Attachment: HIVE-16546.5.patch

The dreaded integer overflow caused some failures in large scale testing. Fixed it in .5 patch.


> LLAP: Fail map join tasks if hash table memory exceeds threshold
> ----------------------------------------------------------------
>
>                 Key: HIVE-16546
>                 URL: https://issues.apache.org/jira/browse/HIVE-16546
>             Project: Hive
>          Issue Type: Bug
>          Components: llap
>    Affects Versions: 3.0.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>         Attachments: HIVE-16546.1.patch, HIVE-16546.2.patch, HIVE-16546.3.patch, HIVE-16546.4.patch,
HIVE-16546.5.patch, HIVE-16546.WIP.patch
>
>
> When map join task is running in llap, it can potentially use lot more memory than its
limit which could be memory per executor or no conditional task size. If it uses more memory,
it can adversely affect other query performance or it can even bring down the daemon. In such
cases, it is better to fail the query than to bring down the daemon. 



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