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From "Paul Rogers (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (DRILL-5060) External Sort does not recognize query cancellation during long events
Date Mon, 19 Jun 2017 18:41:00 GMT

     [ https://issues.apache.org/jira/browse/DRILL-5060?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Paul Rogers reassigned DRILL-5060:
----------------------------------

    Assignee: Paul Rogers

> External Sort does not recognize query cancellation during long events
> ----------------------------------------------------------------------
>
>                 Key: DRILL-5060
>                 URL: https://issues.apache.org/jira/browse/DRILL-5060
>             Project: Apache Drill
>          Issue Type: Bug
>    Affects Versions: 1.8.0
>            Reporter: Paul Rogers
>            Assignee: Paul Rogers
>            Priority: Minor
>
> The external sort operator performs in-memory or on-disk sorting. Several functions within
external sort can take an extended time. During this time, the operator does not check if
a query cancellation has occurred. These long events are:
> * Spilling a group of batches to disk
> * In-memory sort
> Note that "re-spilling" of spill files is covered by the first item above: re-spill uses
the same code to write the new file as is used for the original "first generation" spill files.
> Also, the final merge is handled because the downstream operator will check for cancellation
prior to fetching each batch from the sort operator.



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