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Date: Thu, 11 Sep 2008 21:47:44 -0700 (PDT)
From: "Vinod K V (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Updated: (HADOOP-4060) [HOD] Make HOD to roll log files on
 the client
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     [ https://issues.apache.org/jira/browse/HADOOP-4060?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vinod K V updated HADOOP-4060:
------------------------------

    Hadoop Flags: [Reviewed]  (was: [Reviewed, Incompatible change])

The change is backwards compatible. A value of zero for -L brings back the old behaviour.

> [HOD] Make HOD to roll log files on the client 
> -----------------------------------------------
>
>                 Key: HADOOP-4060
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4060
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/hod
>            Reporter: Hemanth Yamijala
>            Assignee: Vinod K V
>            Priority: Blocker
>             Fix For: 0.18.1
>
>         Attachments: HOD-LOG-ROTATION.1.txt, HOD-LOG-ROTATION.txt
>
>
> Currently HOD writes a log file on the client in the cluster directory, named hod-<username>.log. This file is appended to for each run of hod allocation that runs on the same cluster directory. Thus, the file can become quite large - particularly if the job is queued for a long time. If there are problems with the HOD client subsequently, this could result in stale file handles pointing to this large file, and cause disk space to fill up. Another problem is that a large log file is usually unusable for a user.

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