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https://issues.apache.org/jira/browse/HADOOP-6317?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12768339#action_12768339
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Arun C Murthy commented on HADOOP-6317:
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I was thinking along the lines of the tasktracker doing something like:
conf.setFinalInt("mapred.task.id", taskAttemptId);
or
conf.setInt("mapred.task.id", taskAttemptId, true);
where we have the necessary apis like so:
Configuration.setFinalInt(String key, int value);
or
Configuration.setInt(String key, int value, boolean finalParam);
Does that make sense?
> Serialize the 'final'ness of Configuration keys
> -----------------------------------------------
>
> Key: HADOOP-6317
> URL: https://issues.apache.org/jira/browse/HADOOP-6317
> Project: Hadoop Common
> Issue Type: Improvement
> Components: conf
> Reporter: Arun C Murthy
> Assignee: Aaron Kimball
> Fix For: 0.22.0
>
> Attachments: HADOOP-6317.patch
>
>
> Currently Configuration.writeXml doesn't serialize the 'final' attribute.
> There are some scenarios where it is useful:
> # TaskTracker should mark the tasks' 'localized' parameters as 'final'
> # GUI tools
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