[jira] [Resolved] (IMPALA-9140) Get rid of the unnecessary load submitter thread pool in tblLoadingMgr

["Vihang Karajgaonkar (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-9140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vihang Karajgaonkar resolved IMPALA-9140.
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    Resolution: Won't Fix

Based on the discussion above, it looks like there is no significant benefit by fixing this JIRA. Closing this as "won't fix".

> Get rid of the unnecessary load submitter thread pool in tblLoadingMgr
> ----------------------------------------------------------------------
>
>                 Key: IMPALA-9140
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9140
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Catalog
>            Reporter: Vihang Karajgaonkar
>            Priority: Major
>
> This JIRA is created as a followup on the discussion on https://gerrit.cloudera.org/#/c/14611 related to various pools used for loading tables.
> It looks like there are 2 pools of threads both of the size {{num_metadata_loading_threads}}. One pool is used to submit the load requests to another pool {{tblLoadingPool_}} which does the actual loading of the tables. I think we can get rid of the pool which submits the tasks since it is not very time-consuming operation and can be done synchronously (all it needs to do submit the task in the queue in the front or back based on whether its a prioritized load or background load). This will simplify the loading code and  reduce unnecessary number of threads being created by {{TblLoadingMgr}}



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