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https://issues.apache.org/jira/browse/HIVE-25976?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17531212#comment-17531212
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Zoltan Haindrich commented on HIVE-25976:
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attached a unit test which reproduces the behaviour
> 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
> 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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