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From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-840) DBInputFormat leaves open transaction
Date Fri, 07 Aug 2009 21:47:14 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aaron Kimball updated MAPREDUCE-840:
------------------------------------

    Attachment: MAPREDUCE-840.patch

Attaching trivial patch for this issue. No new tests because I've only seen this issue manifest
in interacting with postgresql. I've verified that with this fix in place, it works with postgresql.
The TestDBJob unit test also works.

> DBInputFormat leaves open transaction
> -------------------------------------
>
>                 Key: MAPREDUCE-840
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-840
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>            Priority: Minor
>         Attachments: MAPREDUCE-840.patch
>
>
> DBInputFormat.getSplits() does not connection.commit() after the COUNT query. This can
leave an open transaction against the database which interferes with other connections to
the same table.

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