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From "John Omernik (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-2656) Add ability to specify options for clean shutdown of a Drillbit
Date Tue, 03 May 2016 18:20:12 GMT

    [ 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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