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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2092) Create a light inner conf class in DFSClient
Date Fri, 24 Jun 2011 17:51:47 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13054577#comment-13054577
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Tsz Wo (Nicholas), SZE commented on HDFS-2092:
----------------------------------------------

Hi Aaron, we did see some cases in the past that some users put a large object in conf and
then JT/TT ran out of memory.  Indeed, users can put arbitrary large objects in conf.  So
this change also prevents such problems.

> Create a light inner conf class in DFSClient
> --------------------------------------------
>
>                 Key: HDFS-2092
>                 URL: https://issues.apache.org/jira/browse/HDFS-2092
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>    Affects Versions: 0.23.0
>            Reporter: Bharath Mundlapudi
>            Assignee: Bharath Mundlapudi
>             Fix For: 0.23.0
>
>         Attachments: HDFS-2092-1.patch, HDFS-2092-2.patch
>
>
> At present, DFSClient stores reference to configuration object. Since, these configuration
objects are pretty big at times can blot the processes which has multiple DFSClient objects
like in TaskTracker. This is an attempt to remove the reference of conf object in DFSClient.

> This patch creates a light inner conf class and copies the required keys from the Configuration
object.

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