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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-19598) Acid V1 to V2 upgrade
Date Sat, 26 May 2018 16:52:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-19598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16491733#comment-16491733
] 

Ashutosh Chauhan commented on HIVE-19598:
-----------------------------------------

Changes in packaging/pom.xml will bundle this jar with 3.0 distro. But since it declares dependency
on hive-2.3.3 I suspect it will package hive-2.3 jars as well which may be trouble. I think
all dependencies of this module should be excluded from packaging and should only contain
this jar only.

> Acid V1 to V2 upgrade
> ---------------------
>
>                 Key: HIVE-19598
>                 URL: https://issues.apache.org/jira/browse/HIVE-19598
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>    Affects Versions: 3.0.0
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>            Priority: Critical
>         Attachments: HIVE-19598.02.patch, HIVE-19598.05.patch
>
>
> The on-disk layout for full acid (transactional) tables has changed 3.0.
> Any transactional table that has any update/delete events in any deltas that have not
been Major compacted, must go through a Major compaction before upgrading to 3.0.  No more
update/delete/merge should be run after/during major compaction.
> Not doing so will result in data corruption/loss.
>  
> Need to create a utility tool to help with this process.  HIVE-19233 started this but
it needs more work.



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