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From "Radim Kolar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4594) Add init/shutdown methods to Partitioner and RawComparator
Date Mon, 27 Aug 2012 07:25:09 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13442316#comment-13442316

Radim Kolar commented on MAPREDUCE-4594:

If you have component based application where partitioner is one of application components
it needs to have support for its own lifecycle if it does anything which allocate resources
in init (setConf()) method.
> Add init/shutdown methods to Partitioner and RawComparator
> ----------------------------------------------------------
>                 Key: MAPREDUCE-4594
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4594
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: client
>    Affects Versions: trunk
>            Reporter: Radim Kolar
> The Partitioner and the RawComparator interfaces/extension points support only the Configurable
API, which can be used for basic
> init in setConf(). Problem is that there is no shutdown function.
> I propose to use standard setup() cleanup() functions like in mapper / reducer.
> Use case is that I need to start and stop spring context and datagrid client.

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