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From "John Omernik (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-4604) Generate warning on Web UI if drillbits have different versions
Date Thu, 14 Apr 2016 13:53:25 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15241185#comment-15241185
] 

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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