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https://issues.apache.org/jira/browse/DRILL-4286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16240795#comment-16240795
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ASF GitHub Bot commented on DRILL-4286:
---------------------------------------
Github user dvjyothsna commented on a diff in the pull request:
https://github.com/apache/drill/pull/921#discussion_r149186401
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/work/foreman/Foreman.java ---
@@ -348,6 +354,21 @@ public void run() {
*/
}
+ /*
+ Check if the foreman is ONLINE. If not dont accept any new queries.
+ */
+ public void checkForemanState() throws ForemanException{
+ DrillbitEndpoint foreman = drillbitContext.getEndpoint();
+ Collection<DrillbitEndpoint> dbs = drillbitContext.getAvailableBits();
--- End diff --
DrillbitEndPoint is protobuf generated code so I cannot modify that. Can I
add isOnline() method in foreman or a new Class ?
> 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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