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https://issues.apache.org/jira/browse/DRILL-4680?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Khurram Faraaz updated DRILL-4680:
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    Priority: Critical  (was: Major)

> Cancel query that is in Planing state - user RPC thread of the foreman 
> Drillbit will block waiting for query to finish planing
> ------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DRILL-4680
>                 URL: https://issues.apache.org/jira/browse/DRILL-4680
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 1.7.0
>         Environment: 4 node cluster CentOS
>            Reporter: Khurram Faraaz
>            Priority: Critical
>
> Unfortunately, if you try to cancel a query that's still in planing, the user 
> RPC thread of the foreman Drillbit will block waiting for the query to finish 
> planing, this will cause any other query submitted to the same Drillbit to 
> block as well. It's a known issue (actually a serious Drill  limitation).



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