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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-4596) Drill should do version check among drillbits
Date Mon, 11 Apr 2016 19:41:25 GMT

    [ https://issues.apache.org/jira/browse/DRILL-4596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15235813#comment-15235813
] 

ASF GitHub Bot commented on DRILL-4596:
---------------------------------------

Github user arina-ielchiieva commented on the pull request:

    https://github.com/apache/drill/pull/474#issuecomment-208521519
  
    I thought it's hard to maintain backward compatibility. Quoting Parth comment from Jira:
    "Drill needs to be able to run queries that depend only on features that are in the oldest
version of Drill in the cluster. Say for example, most drillbits are at version N and some
are at version N+1. You added support for a new type foo in version N+1. Any queries not using
or depending on type foo should run successfully. Queries depending on foo can only run successfully
after all the drillbits are upgraded to N+1."


> Drill should do version check among drillbits
> ---------------------------------------------
>
>                 Key: DRILL-4596
>                 URL: https://issues.apache.org/jira/browse/DRILL-4596
>             Project: Apache Drill
>          Issue Type: New Feature
>    Affects Versions: 1.6.0
>            Reporter: Arina Ielchiieva
>            Assignee: Arina Ielchiieva
>             Fix For: Future
>
>
> Before registering new drillbit in zookeeper, we should do version check, and make sure
all the running drillbits are in the same version.
> Using drillbits of different version can lead to unexpected results.



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