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From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-1443) DBInputFormat can leak connections
Date Tue, 02 Feb 2010 21:26:21 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Aaron Kimball updated MAPREDUCE-1443:

    Attachment: MAPREDUCE-1443.patch

This patch refactors some internals of DBInputFormat so that both DBInputFormat and DataDrivenDBInputFormat
can close connections opened in the {{getSplits()}} call.

This patch does not include explicit tests. I used Oracle and MySQL administration tools to
verify that connections are closed in a timely fashion and that open connections do not accrue
over time, as they previously did.

> DBInputFormat can leak connections
> ----------------------------------
>                 Key: MAPREDUCE-1443
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1443
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: client
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>         Attachments: MAPREDUCE-1443.patch
> The DBInputFormat creates a Connection to use when enumerating splits, but never closes
it. This can leak connections to the database which are not cleaned up for a long time.

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