[jira] [Commented] (HIVE-25101) Remove HBase libraries from Hive distribution

["Istvan Toth (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-25101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17343018#comment-17343018 ] 

Istvan Toth commented on HIVE-25101:
------------------------------------

We could also solve the problem the other way around, by not adding the shaded HBase libraries to the classpath, and standardizing on the unshaded libraries, but I prefer this one due to the reasons above.

> Remove HBase libraries from Hive distribution
> ---------------------------------------------
>
>                 Key: HIVE-25101
>                 URL: https://issues.apache.org/jira/browse/HIVE-25101
>             Project: Hive
>          Issue Type: Improvement
>          Components: HBase Handler, Hive
>    Affects Versions: 4.0.0
>            Reporter: Istvan Toth
>            Assignee: Istvan Toth
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Hive currently packages HBase libraries into its lib directory.
> It also adds the HBase libraries separately to its classpath in the hive startup script.
> Having both mechanisms is redundant, and it also causes errors, as the standard HBase libraries packaged into Hive are unshaded, while the libraries added by _hbase mapredcp_
> are shaded, and the two are NOT compatible when custom coprocessors are used, and in some cases the classpaths during local execution and for MR/TEZ jobs are mutually incompatible.
> I propose removing all HBase libraries from the distribution, and pulling them via the hbase mapredcp mechanism.
> This also solves the old problem of including ancient HBase alpha versions Hive.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)