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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-6043) Document incompatible changes in Hive 0.12 and trunk
Date Tue, 17 Dec 2013 19:30:07 GMT

    [ https://issues.apache.org/jira/browse/HIVE-6043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13850810#comment-13850810
] 

Sergey Shelukhin commented on HIVE-6043:
----------------------------------------

HIVE-4914? It does have backward compat

> Document incompatible changes in Hive 0.12 and trunk
> ----------------------------------------------------
>
>                 Key: HIVE-6043
>                 URL: https://issues.apache.org/jira/browse/HIVE-6043
>             Project: Hive
>          Issue Type: Task
>            Reporter: Brock Noland
>            Priority: Blocker
>
> We need to document incompatible changes. For example
> * HIVE-5372 changed object inspector hierarchy breaking most if not all custom serdes
> * HIVE-1511/HIVE-5263 serializes ObjectInspectors with Kryo so all custom serdes (fixed
by HIVE-5380)
> * Hive 0.12 separates MapredWork into MapWork and ReduceWork which is used by Serdes
> * HIVE-5411 serializes expressions with Kryo which are used by custom serdes
> * HIVE-4827 removed the flag of "hive.optimize.mapjoin.mapreduce" (This flag was introduced
in Hive 0.11 by HIVE-3952).



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