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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-2925) [HOD] Create mapred system directory using a naming convention that will avoid clashes in multi-user shared cluster scenario.
Date Mon, 03 Mar 2008 11:36:50 GMT
[HOD] Create mapred system directory using a naming convention that will avoid clashes in multi-user
shared cluster scenario.
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                 Key: HADOOP-2925
                 URL: https://issues.apache.org/jira/browse/HADOOP-2925
             Project: Hadoop Core
          Issue Type: Bug
          Components: contrib/hod
    Affects Versions: 0.16.0
            Reporter: Hemanth Yamijala
            Assignee: Hemanth Yamijala
             Fix For: 0.16.1


Currently, HOD generates the name of the mapredsystem directory using the name /mapredsystem/hostname-of-jobtracker.

In HADOOP-2899, we ran into a scenario where this naming convention could lead to problems
in case dfs permissions are enabled. While the bug should ideally be addressed in Hadoop M/R,
it will be better that HOD does not generate names that can potentially clash across runs.
One way to solve the problem is to do what HOD already does for local log and temp directories
- name it using username.torque-job-id, which is going to be pretty unique mostly.

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