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From "Thiruvel Thirumoolan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9582) HCatalog should use IMetaStoreClient interface
Date Tue, 10 Mar 2015 00:20:38 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14353949#comment-14353949
] 

Thiruvel Thirumoolan commented on HIVE-9582:
--------------------------------------------

Thanks Sushanth. Thejas looked at the patch and gave a first level review. I have addressed
his comments and uploaded the patch.

> HCatalog should use IMetaStoreClient interface
> ----------------------------------------------
>
>                 Key: HIVE-9582
>                 URL: https://issues.apache.org/jira/browse/HIVE-9582
>             Project: Hive
>          Issue Type: Sub-task
>          Components: HCatalog, Metastore
>    Affects Versions: 0.14.0, 0.13.1
>            Reporter: Thiruvel Thirumoolan
>            Assignee: Thiruvel Thirumoolan
>              Labels: hcatalog, metastore, rolling_upgrade
>             Fix For: 0.14.1
>
>         Attachments: HIVE-9582.1.patch, HIVE-9582.2.patch, HIVE-9582.3.patch, HIVE-9582.4.patch,
HIVE-9583.1.patch
>
>
> Hive uses IMetaStoreClient and it makes using RetryingMetaStoreClient easy. Hence during
a failure, the client retries and possibly succeeds. But HCatalog has long been using HiveMetaStoreClient
directly and hence failures are costly, especially if they are during the commit stage of
a job. Its also not possible to do rolling upgrade of MetaStore Server.



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