[jira] [Assigned] (HIVE-25976) Cleaner may remove files being accessed from a fetch-task-converted reader

["László Végh (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-25976?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

László Végh reassigned HIVE-25976:
----------------------------------

    Assignee: László Végh

> Cleaner may remove files being accessed from a fetch-task-converted reader
> --------------------------------------------------------------------------
>
>                 Key: HIVE-25976
>                 URL: https://issues.apache.org/jira/browse/HIVE-25976
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Zoltan Haindrich
>            Assignee: László Végh
>            Priority: Major
>         Attachments: fetch_task_conv_compactor_test.patch
>
>
> in a nutshell the following happens:
> * query is compiled in fetch-task-converted mode
> * no real execution happens....but the locks are released
> * the HS2 is communicating with the client and uses the fetch-task to get the rows - which in this case will directly read files from the table's directory....
> * client sleeps between reads - so there is ample time for other events...
> * cleaner wakes up and removes some files....
> * in the next read the fetch-task encounters a read error...



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