[jira] [Commented] (HIVE-6952) Hive 0.13 HiveOutputFormat breaks backwards compatibility

["Costin Leau (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-6952?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13976591#comment-13976591 ] 

Costin Leau commented on HIVE-6952:
-----------------------------------

Actually taking a closer look indicates that FSRecordWriter and RecordWriter are identical - they both implement the same two methods, with the _exact_ same signature which makes the breaking change even more puzzling.

> Hive 0.13 HiveOutputFormat breaks backwards compatibility
> ---------------------------------------------------------
>
>                 Key: HIVE-6952
>                 URL: https://issues.apache.org/jira/browse/HIVE-6952
>             Project: Hive
>          Issue Type: Bug
>          Components: File Formats, Serializers/Deserializers
>    Affects Versions: 0.13.0
>            Reporter: Costin Leau
>            Priority: Blocker
>
> Hive 0.13 changed the signature of HiveOutputFormat (through commit r1527149) breaking backwards compatibility with previous releases; the return type of getHiveRecordWriter has been changed from RecordWriter to FSRecordWriter.
> FSRecordWriter introduces one new method on top of RecordWriter however it does not extend the previous interface and it lives in a completely new package.
> Thus code running fine on Hive 0.12 breaks on Hive 0.13. After the upgrade, code running on HIve 0.13, will break on anything lower than this.
> This could have easily been avoided by extending the existing interface or introducing a new one that RecordWriter could have extended going forward. By changing the signature, the existing contract (and compatibility) has been voided.



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