[jira] [Assigned] (IMPALA-14840) Pool can use more memory than Max Memory when Min/Max Query Memory limit is not set

["Zoltán Borók-Nagy (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-14840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zoltán Borók-Nagy reassigned IMPALA-14840:
------------------------------------------

    Assignee: Zoltán Borók-Nagy

> Pool can use more memory than Max Memory when Min/Max Query Memory limit is not set
> -----------------------------------------------------------------------------------
>
>                 Key: IMPALA-14840
>                 URL: https://issues.apache.org/jira/browse/IMPALA-14840
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Backend
>            Reporter: Zoltán Borók-Nagy
>            Assignee: Zoltán Borók-Nagy
>            Priority: Major
>
> Based on the following comments a query can use unlimited resources if
> * Pool has no Min and Max Query Memory LImit
> * Query option MEM_LIMIT is not set
> https://github.com/apache/impala/blob/787b63a4b88b91bf441200e336ca0bac873541b9/be/src/scheduling/schedule-state.cc#L301-L303
> {noformat}
>   // If the min_query_mem_limit and max_query_mem_limit are not set in the pool config
>   // then it falls back to traditional(old) behavior, which means that, it sets the
>   // mem_limit if it is set in the query options, else sets it to -1 (no limit).
> {noformat}
> https://github.com/apache/impala/blob/787b63a4b88b91bf441200e336ca0bac873541b9/be/src/scheduling/schedule-state.cc#L411
> This can lead to using more memory than the specified "Max Memory" for the pool.



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