[jira] Commented: (HADOOP-4491) Per-job local data on the TaskTracker node should have right access-control

["Vinod K V (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-4491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12716581#action_12716581 ] 

Vinod K V commented on HADOOP-4491:
-----------------------------------

Here's an overview of the problem(with most of the input from [~sreekanth]):

*Objective*:
 - Setup secure permissions for task files and job files. Secure permissions means permission only to the user running the job (700).

*Problems to solve*:
With HADOOP-4490, framework is in place to run the user's process as the user himself/herself. To continue to run jobs successfully, HADOOP-4490 set permissions of all files to 777. The scope of this issue is o set secure permissions for these files. After setting these,
 - we should be able to run jobs successfully as a user different from the TaskTracker user,
 - all the files the user owns have to be set 700 permissions,
 - TT should continue to be able to serve map intermediate outputs to reduces and serve user-logs via TaskLogServlet.

*Issues involved:*
 - handling localization for tasks.
 - handling intermediate output files.
 - handling intermediate output serving.

> Per-job local data on the TaskTracker node should have right access-control
> ---------------------------------------------------------------------------
>
>                 Key: HADOOP-4491
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4491
>             Project: Hadoop Core
>          Issue Type: Sub-task
>          Components: mapred, security
>            Reporter: Arun C Murthy
>


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