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https://issues.apache.org/jira/browse/DRILL-4286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16252596#comment-16252596
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ASF GitHub Bot commented on DRILL-4286:
---------------------------------------
Github user paul-rogers commented on a diff in the pull request:
https://github.com/apache/drill/pull/921#discussion_r150982788
--- Diff: exec/java-exec/src/main/resources/drill-module.conf ---
@@ -368,6 +368,13 @@ drill.exec: {
// planning and managing queries. Primarily for testing.
cpus_per_node: 0,
}
+ # Grace period is the amount of time where the drillbit accepts work
after
+ # the shutdown request is triggered. The primary use of grace period is
to
+ # avoid the race conditions caused by zookeeper delay in updating the
state
+ # information of the drillbit that is shutting down. So, it is advisable
+ # to have a grace period that is atleast twice the amount of zookeeper
+ # refresh time.
+ grace_period : 10000
--- End diff --
Units? Just add a note to the end of your comment to say the units are ms.
In the future, I've found it to be handy to put the units in the name:
`grace_period_ms` for example.
> Have an ability to put server in quiescent mode of operation
> ------------------------------------------------------------
>
> Key: DRILL-4286
> URL: https://issues.apache.org/jira/browse/DRILL-4286
> Project: Apache Drill
> Issue Type: New Feature
> Components: Execution - Flow
> Reporter: Victoria Markman
> Assignee: Venkata Jyothsna Donapati
>
> I think drill will benefit from mode of operation that is called "quiescent"
> in some databases.
> From IBM Informix server documentation:
> {code}
> Change gracefully from online to quiescent mode
> Take the database server gracefully from online mode to quiescent mode to
> restrict access to the database server without interrupting current
> processing. After you perform this task, the database server sets a flag that
> prevents new sessions from gaining access to the database server. The current
> sessions are allowed to finish processing. After you initiate the mode
> change, it cannot be canceled. During the mode change from online to
> quiescent, the database server is considered to be in Shutdown mode.
> {code}
> This is different from shutdown, when processes are terminated.
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