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From "Amareshwari Sriramadasu (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2914) extend DistributedCache to work locally (LocalJobRunner)
Date Mon, 01 Jun 2009 06:16:07 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12714988#action_12714988
] 

Amareshwari Sriramadasu commented on HADOOP-2914:
-------------------------------------------------

bq. It's my belief that SVN r696957 (HADOOP-249) turned off the symlink feature and that it
hasn't worked since then. That said, I haven't yet written the test that would confirm this.
symlinks are not created TaskRunner.run(). They are created in setupWorkDir(), called from
child. This is an optimization introduced in HADOOP-249. The test TestMiniMRDFSCaching tests
DistributedCache and symlinks in it also .

> extend DistributedCache to work locally (LocalJobRunner)
> --------------------------------------------------------
>
>                 Key: HADOOP-2914
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2914
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: sam rash
>            Assignee: Philip Zeyliger
>            Priority: Minor
>         Attachments: HADOOP-2914-v1-full.patch, HADOOP-2914-v1-since-4041.patch
>
>
> The DistributedCache does not work locally when using the outlined recipe at http://hadoop.apache.org/core/docs/r0.16.0/api/org/apache/hadoop/filecache/DistributedCache.html

> Ideally, LocalJobRunner would take care of populating the JobConf and copying remote
files to the local file sytem (http, assume hdfs = default fs = local fs when doing local
development.

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