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https://issues.apache.org/jira/browse/DRILL-4604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15241185#comment-15241185
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John Omernik commented on DRILL-4604:
-------------------------------------
So this confused me a bit, so I did some testing. There must be configuration
items stored in the Zookeeper information about the cluster. For example:
Default setting for exec.queue.enable is false.
I validated this on my cluster.
I changed it, as an admin user, with ALTER SYSTEM SET `exec.queue.enable` =
true;
This returned correctly and select * from sys.options; showed the value as
changed. Note, I did not update ANY configs on ANY drill bits, just altered
the setting in the cluster.
Then I shutdown all my drill bits, and then restarted them. Thus, there is no
place this setting was set in configuration, it was just changed with ALTER
SYSTEM (and thus I am assuming it was changed in Zookeeper).
With the restarted cluster, the setting persisted, (it was set to true after
restart). So, there must be a configuration store in Zookeeper that allowed
this setting to persist.
John
> Generate warning on Web UI if drillbits have different versions
> ---------------------------------------------------------------
>
> Key: DRILL-4604
> URL: https://issues.apache.org/jira/browse/DRILL-4604
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.6.0
> Reporter: Arina Ielchiieva
> Assignee: Arina Ielchiieva
> Fix For: 1.7.0
>
>
> Display drillbit version on web UI. If any of drillbits version doesn't match
> with current drillbit, generate warning.
> Screenshots - TBA.
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