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From "Chris Westin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-2656) Add ability to specify options for clean shutdown of a Drillbit
Date Wed, 01 Apr 2015 18:36:55 GMT
Chris Westin created DRILL-2656:

             Summary: 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
            Assignee: Chris Westin
             Fix For: 1.0.0

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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