[jira] [Assigned] (IMPALA-8739) FileMetadataLoader skips empty directories

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

     [ https://issues.apache.org/jira/browse/IMPALA-8739?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zoltán Borók-Nagy reassigned IMPALA-8739:
-----------------------------------------

    Assignee: Zoltán Borók-Nagy

> FileMetadataLoader skips empty directories
> ------------------------------------------
>
>                 Key: IMPALA-8739
>                 URL: https://issues.apache.org/jira/browse/IMPALA-8739
>             Project: IMPALA
>          Issue Type: Bug
>            Reporter: Vihang Karajgaonkar
>            Assignee: Zoltán Borók-Nagy
>            Priority: Major
>              Labels: impala-acid
>
> {{FileMetadataLoader}} has certain code paths like the one below which using {{listFiles}} API on the filesystem. This API ignores empty directories which is okay for non-transactional tables. However, in case of transactional table an empty base directory provides writeId information which is used to skip loading files which are not relevant for a given writeId. See {{AcidUtils#filterFilesForAcidState}} usage for details.



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