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From "Paul Yang (JIRA)" <>
Subject [jira] Commented: (HIVE-1853) downgrade JDO version
Date Thu, 16 Dec 2010 22:45:01 GMT


Paul Yang commented on HIVE-1853:

The bug is that get_table (and likely get_partition) returns null even though the object clearly
exists. This is without any pruning or filtering.

Since the bug is within the newer version JDO/datanucleus, and HIVE-1609 (listPartitionsByFilter)
depends on the newer version, it wouldn't have worked with the JDO downgrade.

This patch undoes HIVE-1660, reverts JDO back to the older version, and disables listPartitionsByFilter().

> downgrade JDO version
> ---------------------
>                 Key: HIVE-1853
>                 URL:
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.7.0
>            Reporter: Namit Jain
>            Assignee: Paul Yang
>             Fix For: 0.7.0
>         Attachments: HIVE-1853.1.patch, HIVE-1853.2.patch
> After HIVE-1609, we are seeing some table not found errors intermittently.
> We have a test case where 5 processes are concurrently issueing the same query - 
> explain extended insert .. select from <T>
> and once in a while, we get a error <T> not found - 
> When we revert back the JDO version, the error is gone.
> We can investigate later to find the JDO bug, but for now this is a show-stopper for
facebook, and needs
> to be reverted back immediately.
> This also means, that the filters will not be pushed to mysql.

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