[jira] [Commented] (DRILL-2656) Add ability to specify options for clean shutdown of a Drillbit

["John Omernik (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-2656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15269275#comment-15269275 ] 

John Omernik commented on DRILL-2656:
-------------------------------------

This feature would be very important for multi-tenant clusters and clusters where say you want to be able to shutdown half of the available drillbits for the evening when no one is running queries to be able to free up resources for other things in the cluster.   Lots of reasons for this, +1 from me. 

> Add ability to specify options for clean shutdown of a Drillbit
> ---------------------------------------------------------------
>
>                 Key: DRILL-2656
>                 URL: https://issues.apache.org/jira/browse/DRILL-2656
>             Project: Apache Drill
>          Issue Type: New Feature
>          Components: Execution - Flow
>    Affects Versions: 0.8.0
>            Reporter: Chris Westin
>             Fix For: Future
>
>
> When we shut down a Drillbit, we should provide some options similar to those available from Oracle's shutdown command (see https://docs.oracle.com/cd/B28359_01/server.111/b28310/start003.htm#ADMIN11156) .
> At present, in order to avoid problems like DRILL-2654, we try to do a short wait for executing queries, but that times out after 5 seconds, and doesn't help with long-running queries.
> Someone that is running a long query might be unhappy about losing work for something that was near completion, so we can do better.
> And, in order to avoid spurious cleanup problems and exceptions, we should explicitly cancel any remaining queries before we do complete the shutdown.
> As in the Oracle example, we might have shutdown immediate issue cancellations to the running queries.  A clean shutdown might not have a timeout, or might allow the specification of a longer timeout, and even when the timeout goes off, we should still cleanly cancel any remaining queries, and wait for the cancellations to complete.



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