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https://issues.apache.org/jira/browse/HIVE-2758?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13197997#comment-13197997
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Phabricator commented on HIVE-2758:
-----------------------------------
kevinwilfong has commented on the revision "HIVE-2758 [jira] Metastore is
caching too aggressively".
Thanks, Carl. I got it.
REVISION DETAIL
https://reviews.facebook.net/D1491
> Metastore is caching too aggressively
> -------------------------------------
>
> Key: HIVE-2758
> URL: https://issues.apache.org/jira/browse/HIVE-2758
> Project: Hive
> Issue Type: Bug
> Reporter: Kevin Wilfong
> Assignee: Kevin Wilfong
> Fix For: 0.9.0
>
> Attachments: HIVE-2758.D1491.1.patch, HIVE-2758.D1491.2.patch
>
>
> The metastore is caching values, like table names and locations too
> aggressively, leading to inconsistencies across Hive clients and metastore
> Thrift servers.
> For example, open two Hive clients, in each call
> DESCRIBE FORMATTED table_foo;
> Then in one of those clients, execute
> ALTER TABLE table_foo RENAME TO table_bar;
> Then in both clients call
> DESCRIBE FORMATTED table_bar;
> In the client that executed the alter command, the location is correct,
> however, in the other Hive client, it will still show the original location
> of table_foo.
> A similar experiment can be done using metastore Thrift servers, substituting
> get_table for DESCRIBE FORMATTED and alter_table for ALTER TABLE ... RENAME
> TO.
> On the Thrift server you can see that the one which did not execute the alter
> command, not only returns the wrong location, despite calling
> get_table('table_bar') it will return a table that still has the name
> table_foo.
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